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82 lines
2.8 KiB
Plaintext
82 lines
2.8 KiB
Plaintext
"CFDEMproject Website"_lws - "Main Page"_main :c
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:link(lws,http://www.cfdem.com)
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:link(main,CFDEMcoupling_Manual.html)
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:line
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forceSubModels command :h3
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[Syntax:]
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Defined in "couplingProperties"_CFDEMcoupling_dicts.html#couplingProperties
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sub-dictionary of the force model in use. If no force sub-model is applied, ImEx
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is used as default. If the keyword "forceSubModels" is provided, a choice of
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sub-model is demanded.
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forceSubModels
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(
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model_x
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model_y
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); :pre
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model = name of force sub-model to be applied :ul
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[Examples:]
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forceSubModels
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(
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ImEx
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); :pre
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NOTE: This examples list might not be complete - please look for other models
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(forceSubModel XY) in this documentation.
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[Description:]
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The force sub model is designed to hold the settings a force model can have.
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Depending on the availability within the respective force model, the following
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options are handled:
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{treatForceExplicit} - switch for the purely explicit consideration of the force
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term in the equation of motion on the CFD side (off -> the force is considered
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semi-implicitly; default off) :ulb,l
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{treatForceDEM} - switch for the consideration of the forces on the DEM side only
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(off -> calculate forces for DEM and CFD; default off) :l
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{implForceDEM} - If true, the fluid velocity and drag coefficient are communicated
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to the DEM calculation at each coupling time step and the drag force is
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calculated at each DEM time step, using the current particle velocity.
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If false, a force term is communicated to the DEM calculation at each coupling
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time step, the term is constant for one coupling interval.
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(on -> DEM forces are updated every DEM step; default off) :l
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{verbose} - switch for debug output to screen (on -> enable debug output; default
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off) :l
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{interpolation} - switch for the usage of interpolation models when getting data
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for the Lagrangian calculation from Eulerian fields;
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f false, the cell centre values are used. (default off) :l
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{useFilteredDragModel} - switch for using a coarse-grid version of the Beetstra
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drag model (takes grid-size effects into account; default = off) :l
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{useParcelSizeDependentFilteredDrag} - switch for using a coarse-grid version of
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the Beetstra drag model (takes parcel-size effects into account, will force the
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switch useFilteredDragModel to "on"; default = off) :l
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{implForceDEMaccumulated} - Can only be used in combination with implForceDEM
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switch, drag force values of each DEM time step are accumulated and passed on to
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the CFD-calculation. (default off) :l
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{scalarViscosity} - switch for the usage of a user-defined viscosity nu for the
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calculation of the drag force; The CFD calculation always uses the value of the
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transport model. (off -> use transportProperties nu; default off) :l
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:ule
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[Restrictions:]
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none
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[Related commands:]
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"ImEx"_forceSubModel_ImEx.html
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[Default:]
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none
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