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<title>compute temp/deform command &mdash; LAMMPS documentation</title>
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<div class="lammps_version">Version: <b>19 Nov 2024</b></div>
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<p class="caption" role="heading"><span class="caption-text">Command Reference</span></p>
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<li class="toctree-l1"><a class="reference internal" href="fixes.html">Fix Styles</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="computes.html">Compute Styles</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="compute_ackland_atom.html">compute ackland/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_adf.html">compute adf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_angle.html">compute angle command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_angle_local.html">compute angle/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_angmom_chunk.html">compute angmom/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ave_sphere_atom.html">compute ave/sphere/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_basal_atom.html">compute basal/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_body_local.html">compute body/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_bond.html">compute bond command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_bond_local.html">compute bond/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_born_matrix.html">compute born/matrix command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_centro_atom.html">compute centro/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_chunk_atom.html">compute chunk/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_chunk_spread_atom.html">compute chunk/spread/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_cluster_atom.html">compute cluster/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_cluster_atom.html#compute-fragment-atom-command">compute fragment/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_cluster_atom.html#compute-aggregate-atom-command">compute aggregate/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_cna_atom.html">compute cna/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_cnp_atom.html">compute cnp/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_com.html">compute com command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_com_chunk.html">compute com/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_composition_atom.html">compute composition/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_contact_atom.html">compute contact/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_coord_atom.html">compute coord/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_count_type.html">compute count/type command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_damage_atom.html">compute damage/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dihedral.html">compute dihedral command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dihedral_local.html">compute dihedral/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dilatation_atom.html">compute dilatation/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dipole.html">compute dipole command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dipole.html#compute-dipole-tip4p-command">compute dipole/tip4p command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dipole_chunk.html">compute dipole/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dipole_chunk.html#compute-dipole-tip4p-chunk-command">compute dipole/tip4p/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_displace_atom.html">compute displace/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dpd.html">compute dpd command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dpd_atom.html">compute dpd/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_edpd_temp_atom.html">compute edpd/temp/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_efield_atom.html">compute efield/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_efield_wolf_atom.html">compute efield/wolf/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_entropy_atom.html">compute entropy/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_erotate_asphere.html">compute erotate/asphere command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_erotate_rigid.html">compute erotate/rigid command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_erotate_sphere.html">compute erotate/sphere command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_erotate_sphere_atom.html">compute erotate/sphere/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_event_displace.html">compute event/displace command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_fabric.html">compute fabric command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_fep.html">compute fep command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_fep_ta.html">compute fep/ta command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_global_atom.html">compute global/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_group_group.html">compute group/group command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_gyration.html">compute gyration command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_gyration_chunk.html">compute gyration/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_gyration_shape.html">compute gyration/shape command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_gyration_shape_chunk.html">compute gyration/shape/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_heat_flux.html">compute heat/flux command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_hexorder_atom.html">compute hexorder/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_hma.html">compute hma command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_improper.html">compute improper command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_improper_local.html">compute improper/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_inertia_chunk.html">compute inertia/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ke.html">compute ke command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ke_atom.html">compute ke/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ke_atom_eff.html">compute ke/atom/eff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ke_eff.html">compute ke/eff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ke_rigid.html">compute ke/rigid command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_mliap.html">compute mliap command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_momentum.html">compute momentum command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_msd.html">compute msd command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_msd_chunk.html">compute msd/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_msd_nongauss.html">compute msd/nongauss command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_nbond_atom.html">compute nbond/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_omega_chunk.html">compute omega/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_orientorder_atom.html">compute orientorder/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pace.html">compute pace command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pair.html">compute pair command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pair_local.html">compute pair/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pe.html">compute pe command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pe_atom.html">compute pe/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_plasticity_atom.html">compute plasticity/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pod_atom.html">compute pod/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pod_atom.html#compute-podd-atom-command">compute podd/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pod_atom.html#compute-pod-local-command">compute pod/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pod_atom.html#compute-pod-global-command">compute pod/global command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pressure.html">compute pressure command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pressure_alchemy.html">compute pressure/alchemy command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pressure_uef.html">compute pressure/uef command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_property_atom.html">compute property/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_property_chunk.html">compute property/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_property_grid.html">compute property/grid command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_property_local.html">compute property/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ptm_atom.html">compute ptm/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_rattlers_atom.html">compute rattlers/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_rdf.html">compute rdf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_reaxff_atom.html">compute reaxff/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_reduce.html">compute reduce command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_reduce.html#compute-reduce-region-command">compute reduce/region command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_reduce_chunk.html">compute reduce/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_rheo_property_atom.html">compute rheo/property/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_rigid_local.html">compute rigid/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_saed.html">compute saed command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_slcsa_atom.html">compute slcsa/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_slice.html">compute slice command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_contact_radius.html">compute smd/contact/radius command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_damage.html">compute smd/damage command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_hourglass_error.html">compute smd/hourglass/error command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_internal_energy.html">compute smd/internal/energy command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_plastic_strain.html">compute smd/plastic/strain command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_plastic_strain_rate.html">compute smd/plastic/strain/rate command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_rho.html">compute smd/rho command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_defgrad.html">compute smd/tlsph/defgrad command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_dt.html">compute smd/tlsph/dt command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_num_neighs.html">compute smd/tlsph/num/neighs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_shape.html">compute smd/tlsph/shape command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_strain.html">compute smd/tlsph/strain command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_strain_rate.html">compute smd/tlsph/strain/rate command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_stress.html">compute smd/tlsph/stress command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_triangle_vertices.html">compute smd/triangle/vertices command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_ulsph_effm.html">compute smd/ulsph/effm command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_ulsph_num_neighs.html">compute smd/ulsph/num/neighs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_ulsph_strain.html">compute smd/ulsph/strain command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_ulsph_strain_rate.html">compute smd/ulsph/strain/rate command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_ulsph_stress.html">compute smd/ulsph/stress command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_vol.html">compute smd/vol command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sna_atom.html">compute sna/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sna_atom.html#compute-snad-atom-command">compute snad/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sna_atom.html#compute-snav-atom-command">compute snav/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sna_atom.html#compute-snap-command">compute snap command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sna_atom.html#compute-sna-grid-command">compute sna/grid command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sna_atom.html#compute-sna-grid-local-command">compute sna/grid/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sph_e_atom.html">compute sph/e/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sph_rho_atom.html">compute sph/rho/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sph_t_atom.html">compute sph/t/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_spin.html">compute spin command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_stress_atom.html">compute stress/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_stress_atom.html#compute-centroid-stress-atom-command">compute centroid/stress/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_stress_cartesian.html">compute stress/cartesian command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_stress_curvilinear.html">compute stress/cylinder command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_stress_curvilinear.html#compute-stress-spherical-command">compute stress/spherical command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_stress_mop.html">compute stress/mop command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_stress_mop.html#compute-stress-mop-profile-command">compute stress/mop/profile command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tally.html">compute force/tally command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tally.html#compute-heat-flux-tally-command">compute heat/flux/tally command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tally.html#compute-heat-flux-virial-tally-command">compute heat/flux/virial/tally command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tally.html#compute-pe-tally-command">compute pe/tally command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tally.html#compute-pe-mol-tally-command">compute pe/mol/tally command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tally.html#compute-stress-tally-command">compute stress/tally command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tdpd_cc_atom.html">compute tdpd/cc/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp.html">compute temp command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_asphere.html">compute temp/asphere command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_body.html">compute temp/body command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_chunk.html">compute temp/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_com.html">compute temp/com command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_cs.html">compute temp/cs command</a></li>
<li class="toctree-l2 current"><a class="current reference internal" href="#">compute temp/deform command</a><ul>
<li class="toctree-l3"><a class="reference internal" href="#syntax">Syntax</a></li>
<li class="toctree-l3"><a class="reference internal" href="#examples">Examples</a></li>
<li class="toctree-l3"><a class="reference internal" href="#description">Description</a></li>
<li class="toctree-l3"><a class="reference internal" href="#output-info">Output info</a></li>
<li class="toctree-l3"><a class="reference internal" href="#restrictions">Restrictions</a></li>
<li class="toctree-l3"><a class="reference internal" href="#related-commands">Related commands</a></li>
<li class="toctree-l3"><a class="reference internal" href="#default">Default</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_deform_eff.html">compute temp/deform/eff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_drude.html">compute temp/drude command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_eff.html">compute temp/eff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_partial.html">compute temp/partial command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_profile.html">compute temp/profile command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_ramp.html">compute temp/ramp command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_region.html">compute temp/region command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_region_eff.html">compute temp/region/eff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_rotate.html">compute temp/rotate command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_sphere.html">compute temp/sphere command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_uef.html">compute temp/uef command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ti.html">compute ti command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_torque_chunk.html">compute torque/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_vacf.html">compute vacf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_vcm_chunk.html">compute vcm/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_viscosity_cos.html">compute viscosity/cos command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_voronoi_atom.html">compute voronoi/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_xrd.html">compute xrd command</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="pairs.html">Pair Styles</a></li>
<li class="toctree-l1"><a class="reference internal" href="bonds.html">Bond Styles</a></li>
<li class="toctree-l1"><a class="reference internal" href="angles.html">Angle Styles</a></li>
<li class="toctree-l1"><a class="reference internal" href="dihedrals.html">Dihedral Styles</a></li>
<li class="toctree-l1"><a class="reference internal" href="impropers.html">Improper Styles</a></li>
<li class="toctree-l1"><a class="reference internal" href="dumps.html">Dump Styles</a></li>
<li class="toctree-l1"><a class="reference internal" href="fix_modify_atc_commands.html">fix_modify AtC commands</a></li>
<li class="toctree-l1"><a class="reference internal" href="Bibliography.html">Bibliography</a></li>
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<p><span class="math notranslate nohighlight">\(\renewcommand{\AA}{\text{Å}}\)</span></p>
<section id="compute-temp-deform-command">
<span id="index-1"></span><span id="index-0"></span><h1>compute temp/deform command<a class="headerlink" href="#compute-temp-deform-command" title="Link to this heading"></a></h1>
<p>Accelerator Variants: <em>temp/deform/kk</em></p>
<section id="syntax">
<h2>Syntax<a class="headerlink" href="#syntax" title="Link to this heading"></a></h2>
<div class="highlight-LAMMPS notranslate"><div class="highlight"><pre><span></span><span class="k">compute </span><span class="nv nv-Identifier">ID</span><span class="w"> </span><span class="nv nv-Identifier">group-ID</span><span class="w"> </span><span class="n">temp</span><span class="o">/</span><span class="n">deform</span>
</pre></div>
</div>
<ul class="simple">
<li><p>ID, group-ID are documented in <a class="reference internal" href="compute.html"><span class="doc">compute</span></a> command</p></li>
<li><p>temp/deform = style name of this compute command</p></li>
</ul>
</section>
<section id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Link to this heading"></a></h2>
<div class="highlight-LAMMPS notranslate"><div class="highlight"><pre><span></span><span class="k">compute </span><span class="nv nv-Identifier">myTemp</span><span class="w"> </span><span class="nv nv-Identifier">all</span><span class="w"> </span><span class="n">temp</span><span class="o">/</span><span class="n">deform</span>
</pre></div>
</div>
</section>
<section id="description">
<h2>Description<a class="headerlink" href="#description" title="Link to this heading"></a></h2>
<p>Define a computation that calculates the temperature of a group of
atoms, after subtracting out a streaming velocity induced by the
simulation box changing size and/or shape, for example in a
non-equilibrium MD (NEMD) simulation. The size/shape change is
induced by use of the <a class="reference internal" href="fix_deform.html"><span class="doc">fix deform</span></a> command. A compute
of this style is created by the <a class="reference internal" href="fix_nvt_sllod.html"><span class="doc">fix nvt/sllod</span></a>
command to compute the thermal temperature of atoms for thermostatting
purposes. A compute of this style can also be used by any command
that computes a temperature (e.g., <a class="reference internal" href="thermo_modify.html"><span class="doc">thermo_modify</span></a>,
<a class="reference internal" href="fix_temp_rescale.html"><span class="doc">fix temp/rescale</span></a>, <a class="reference internal" href="fix_nh.html"><span class="doc">fix npt</span></a>).</p>
<p>The deformation fix changes the box size and/or shape over time, so
each atom in the simulation box can be thought of as having a
“streaming” velocity. For example, if the box is being sheared in <em>x</em>,
relative to <em>y</em>, then atoms at the bottom of the box (low <em>y</em>) have a
small <em>x</em> velocity, while atoms at the top of the box (high <em>y</em>) have a
large <em>x</em> velocity. This position-dependent streaming velocity is
subtracted from each atoms actual velocity to yield a thermal
velocity, which is then used to compute the temperature.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p><a class="reference internal" href="fix_deform.html"><span class="doc">Fix deform</span></a> has an option for remapping either
atom coordinates or velocities to the changing simulation box. When
using this compute in conjunction with a deforming box, fix deform
should NOT remap atom positions, but rather should let atoms respond
to the changing box by adjusting their own velocities (or let
<a class="reference internal" href="fix_deform.html"><span class="doc">fix deform</span></a> remap the atom velocities; see its remap
option). If fix deform does remap atom positions, then they appear to
move with the box but their velocity is not changed, and thus they do
NOT have the streaming velocity assumed by this compute. LAMMPS will
warn you if fix deform is defined and its remap setting is not
consistent with this compute.</p>
</div>
<p>After the streaming velocity has been subtracted from each atom, the
temperature is calculated by the formula</p>
<div class="math notranslate nohighlight">
\[\text{KE} = \frac{\text{dim}}{2} N k_B T,\]</div>
<p>where KE is the total kinetic energy of the group of atoms (sum of
<span class="math notranslate nohighlight">\(\frac12 m v^2\)</span>, dim = 2 or 3 is the dimensionality of the
simulation, <span class="math notranslate nohighlight">\(N\)</span> is the number of atoms in the group, <span class="math notranslate nohighlight">\(k_B\)</span>
is the Boltzmann constant, and <span class="math notranslate nohighlight">\(T\)</span> is the temperature. Note that
<span class="math notranslate nohighlight">\(v\)</span> in the kinetic energy formula is the atoms velocity.</p>
<p>A symmetric tensor, stored as a six-element vector, is also calculated
by this compute for use in the computation of a pressure tensor by the
<a class="reference internal" href="compute_pressure.html"><span class="doc">compute pressue</span></a> command. The formula for
the components of the tensor is the same as the above expression for
<span class="math notranslate nohighlight">\(E_\mathrm{kin}\)</span>, except that the 1/2 factor is NOT included and
the <span class="math notranslate nohighlight">\(v_i^2\)</span> is replaced by <span class="math notranslate nohighlight">\(v_{i,x} v_{i,y}\)</span> for the
<span class="math notranslate nohighlight">\(xy\)</span> component, and so on. Note that because it lacks the 1/2
factor, these tensor components are twice those of the traditional
kinetic energy tensor. The six components of the vector are ordered
<span class="math notranslate nohighlight">\(xx\)</span>, <span class="math notranslate nohighlight">\(yy\)</span>, <span class="math notranslate nohighlight">\(zz\)</span>, <span class="math notranslate nohighlight">\(xy\)</span>, <span class="math notranslate nohighlight">\(xz\)</span>,
<span class="math notranslate nohighlight">\(yz\)</span>.</p>
<p>The number of atoms contributing to the temperature is assumed to be
constant for the duration of the run; use the <em>dynamic</em> option of the
<a class="reference internal" href="compute_modify.html"><span class="doc">compute_modify</span></a> command if this is not the case.</p>
<p>The removal of the box deformation velocity component by this fix is
essentially computing the temperature after a “bias” has been removed
from the velocity of the atoms. If this compute is used with a fix
command that performs thermostatting then this bias will be subtracted
from each atom, thermostatting of the remaining thermal velocity will
be performed, and the bias will be added back in. Thermostatting
fixes that work in this way include <a class="reference internal" href="fix_nh.html"><span class="doc">fix nvt</span></a>,
<a class="reference internal" href="fix_temp_rescale.html"><span class="doc">fix temp/rescale</span></a>,
<a class="reference internal" href="fix_temp_berendsen.html"><span class="doc">fix temp/berendsen</span></a>, and
<a class="reference internal" href="fix_langevin.html"><span class="doc">fix langevin</span></a>.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>The temperature calculated by this compute is only accurate if
the atoms are indeed moving with a stream velocity profile that
matches the box deformation. If not, then the compute will subtract
off an incorrect stream velocity, yielding a bogus thermal
temperature. You should <strong>not</strong> assume that your atoms are streaming at
the same rate the box is deforming. Rather, you should monitor their
velocity profiles (e.g., via the <a class="reference internal" href="fix_ave_chunk.html"><span class="doc">fix ave/chunk</span></a>
command). You can also compare the results of this compute to
<a class="reference internal" href="compute_temp_profile.html"><span class="doc">compute temp/profile</span></a>, which actually
calculates the stream profile before subtracting it. If the two computes do
not give roughly the same temperature, then your atoms are not streaming
consistent with the box deformation. See the <a class="reference internal" href="fix_deform.html"><span class="doc">fix deform</span></a>
command for more details on ways to get atoms to stream consistently with
the box deformation.</p>
</div>
<p>This compute subtracts out degrees-of-freedom due to fixes that
constrain molecular motion, such as <a class="reference internal" href="fix_shake.html"><span class="doc">fix shake</span></a> and
<a class="reference internal" href="fix_rigid.html"><span class="doc">fix rigid</span></a>. This means the temperature of groups of
atoms that include these constraints will be computed correctly. If
needed, the subtracted degrees-of-freedom can be altered using the
<em>extra</em> option of the <a class="reference internal" href="compute_modify.html"><span class="doc">compute_modify</span></a> command.</p>
<p>See the <a class="reference internal" href="Howto_thermostat.html"><span class="doc">Howto thermostat</span></a> page for a
discussion of different ways to compute temperature and perform
thermostatting.</p>
<hr class="docutils" />
<p>Styles with a <em>gpu</em>, <em>intel</em>, <em>kk</em>, <em>omp</em>, or <em>opt</em> suffix are
functionally the same as the corresponding style without the suffix.
They have been optimized to run faster, depending on your available
hardware, as discussed on the <a class="reference internal" href="Speed_packages.html"><span class="doc">Accelerator packages</span></a>
page. The accelerated styles take the same arguments and should
produce the same results, except for round-off and precision issues.</p>
<p>These accelerated styles are part of the GPU, INTEL, KOKKOS,
OPENMP, and OPT packages, respectively. They are only enabled if
LAMMPS was built with those packages. See the <a class="reference internal" href="Build_package.html"><span class="doc">Build package</span></a> page for more info.</p>
<p>You can specify the accelerated styles explicitly in your input script
by including their suffix, or you can use the <a class="reference internal" href="Run_options.html"><span class="doc">-suffix command-line switch</span></a> when you invoke LAMMPS, or you can use the
<a class="reference internal" href="suffix.html"><span class="doc">suffix</span></a> command in your input script.</p>
<p>See the <a class="reference internal" href="Speed_packages.html"><span class="doc">Accelerator packages</span></a> page for more
instructions on how to use the accelerated styles effectively.</p>
</section>
<hr class="docutils" />
<section id="output-info">
<h2>Output info<a class="headerlink" href="#output-info" title="Link to this heading"></a></h2>
<p>This compute calculates a global scalar (the temperature) and a global
vector of length 6 (symmetric tensor), which can be accessed by
indices 16. These values can be used by any command that uses
global scalar or vector values from a compute as input. See the
<a class="reference internal" href="Howto_output.html"><span class="doc">Howto output</span></a> page for an overview of LAMMPS
output options.</p>
<p>The scalar value calculated by this compute is “intensive”. The
vector values are “extensive”.</p>
<p>The scalar value is in temperature <a class="reference internal" href="units.html"><span class="doc">units</span></a>. The vector
values are in energy <a class="reference internal" href="units.html"><span class="doc">units</span></a>.</p>
</section>
<section id="restrictions">
<h2>Restrictions<a class="headerlink" href="#restrictions" title="Link to this heading"></a></h2>
<blockquote>
<div><p>none</p>
</div></blockquote>
</section>
<section id="related-commands">
<h2>Related commands<a class="headerlink" href="#related-commands" title="Link to this heading"></a></h2>
<p><a class="reference internal" href="compute_temp_ramp.html"><span class="doc">compute temp/ramp</span></a>,
<a class="reference internal" href="compute_temp_profile.html"><span class="doc">compute temp/profile</span></a>,
<a class="reference internal" href="fix_deform.html"><span class="doc">fix deform</span></a>,
<a class="reference internal" href="fix_nvt_sllod.html"><span class="doc">fix nvt/sllod</span></a></p>
</section>
<section id="default">
<h2>Default<a class="headerlink" href="#default" title="Link to this heading"></a></h2>
<p>none</p>
</section>
</section>
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