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lammps/tools/i-pi/examples/tutorial/tutorial-2/tutorial-2b.xml

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<simulation verbosity='high'>
<initialize nbeads='4'>
<file mode='chk'> tutorial-1_RESTART </file>
</initialize>
<output prefix='tut2b'>
<properties filename='md' stride='1'> [ step, time{picosecond}, conserved{kelvin}, temperature{kelvin}, potential{kelvin}, kinetic_cv{kelvin}, pressure_cv{megapascal}, volume ] </properties>
<properties filename='force' stride='20'> [atom_f{piconewton}(atom=0;bead=0)] </properties>
<trajectory filename='pos' stride='100' format='pdb' cell_units='angstrom'> positions{angstrom} </trajectory>
<checkpoint filename='checkpoint' stride='1000' overwrite='True'/>
</output>
<total_steps>100000</total_steps>
<prng> <seed> 31415 </seed> </prng>
<forces>
<socket mode="inet">
<address>localhost</address>
<port> 31415 </port>
</socket>
</forces>
<ensemble mode='npt'>
<barostat mode='isotropic'>
<thermostat mode='langevin'>
<tau units='femtosecond'> 250 </tau>
</thermostat>
<tau units='femtosecond'> 250 </tau>
</barostat>
<thermostat mode='pile_g'>
<tau units='femtosecond'> 25 </tau>
</thermostat>
<timestep units='femtosecond'> 1 </timestep>
<temperature units='kelvin'> 25 </temperature>
<pressure> 0 </pressure>
</ensemble>
</simulation>