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71 lines
1.6 KiB
Plaintext
71 lines
1.6 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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forceModel staticPressure command :h3
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[Syntax:]
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Defined in "couplingProperties"_CFDEMcoupling_dicts.html#couplingProperties
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dictionary.
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forceModels
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(
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staticPressure
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);
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staticPressureProps
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\{
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rhoGas number1;
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voidfractionFieldName "voidfraction";
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rhoPart number2;
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DomainSolidVolumeFraction number3;
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g_DEM gravityVector;
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\} :pre
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{number1} = density of the gas phase :ulb,l
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{voidfraction} = name of the finite volume void fraction field :l
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{number2} = density of the particles :l
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{number3} = domain-average particle volume fraction (mass loading) :l
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{gravityVector} = gravity vector :l
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:ule
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[Examples:]
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forceModels
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(
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staticPressure
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);
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staticPressureProps
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\{
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rhoGas 1.2;
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voidfractionFieldName "voidfraction";
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rhoPart 1500;
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DomainSolidVolumeFraction 0.05;
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g_DEM (0 0 -9.81);
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\} :pre
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[Description:]
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As discussed in "gravityEff"_otherForceModel_gravityEff.html, in case of
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simulating periodic boxes, it is necessary to have a gravitational source term.
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Since that force is added to the gas momentum equation, we need to add the same
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force excluding the effect of the gravitational force on the particles
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(the gravitational force on the particles is already available on the LIGGGHTS side)
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to drive the particles.
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This force model performs the calculation of the following force acting on each
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DEM particle,
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:c,image(Eqs/forceModels_staticPressure_pic1.jpg)
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[Restrictions:]
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none
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[Related commands:]
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"forceModel"_forceModel.html
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