CMS-Flow Eddy Viscosity: Difference between revisions
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(Created page with ==Eddy Viscosity== Eddy Viscosity in CMS-Flow is not a user definable parameter. A description of the advanced cards related to eddy viscosity is shown in the table below. b...) |
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Eddy Viscosity in CMS-Flow is not a user definable parameter. A description of the advanced cards related to eddy viscosity is shown in the table below. | Eddy Viscosity in CMS-Flow is not a user definable parameter. A description of the advanced cards related to eddy viscosity is shown in the table below. | ||
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{| border=1 | {| border="1" | ||
! Card !! Arguments !! Default !! Range !! Description !! Versions | ! Card !! Arguments !! Default !! Range !! Description !! Versions | ||
|- | |- | ||
|TURBULENCE_MODEL || CHARACTER|| SUBGRID || SUBGRID nowiki|/ | |TURBULENCE_MODEL || CHARACTER|| SUBGRID || SUBGRID <nowiki>|</nowiki>FALCONER<nowiki>| </nowiki>PARABOLIC <nowiki>| </nowiki>MIXING-LENGTH || Specifies the turbulence model used || >=3.5 | ||
|- | |- | ||
| EDDY_VISCOSITY_CONSTANT || REAL|| 1.0E-6 || =1.0E-6 || Constant contribution or base value of eddy viscosity || =3.5 | | EDDY_VISCOSITY_CONSTANT || REAL|| 1.0E-6 || >=1.0E-6 || Constant contribution or base value of eddy viscosity || >=3.5 | ||
|- | |- | ||
|EDDY_VISCOSITY_BOTTOM || REAL|| 0.0667 || 0.01-0.2 || Coefficient related to the contribution to eddy viscosity from the bottom shear || =3.5 | |EDDY_VISCOSITY_BOTTOM || REAL|| 0.0667 || 0.01-0.2 || Coefficient related to the contribution to eddy viscosity from the bottom shear || >=3.5 | ||
|- | |- | ||
|EDDY_VISCOSITY_HORIZONTAL || REAL|| 0.4 || 0.2-0.6 || Coefficient related to the contribution to eddy viscosity from horizontal velocity gradients || =3.5 | |EDDY_VISCOSITY_HORIZONTAL || REAL|| 0.4 || 0.2-0.6 || Coefficient related to the contribution to eddy viscosity from horizontal velocity gradients || >=3.5 | ||
|- | |- | ||
|EDDY_VISCOSITY_WAVE || REAL|| 0.5 || 0.2-1.0 || Coefficient related to the wave bottom friction contribution to eddy viscosity || =4.0 | |EDDY_VISCOSITY_WAVE || REAL|| 0.5 || 0.2-1.0 || Coefficient related to the wave bottom friction contribution to eddy viscosity || >=4.0 | ||
|- | |- | ||
|EDDY_VISCOSITY_BREAKING || REAL|| 0.05 || 0.04-0.08 || Coefficient related to the wave breaking contribution to eddy viscosity || =4.0 | |EDDY_VISCOSITY_BREAKING || REAL|| 0.05 || 0.04-0.08 || Coefficient related to the wave breaking contribution to eddy viscosity || >=4.0 | ||
|} | |} | ||
More information can be found [[CMS-Flow:Subgrid_Turbulence_Model|'''here''']]. | More information can be found [[CMS-Flow:Subgrid_Turbulence_Model|'''here''']]. | ||
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[[CMS#Documentation Portal | Documentation Portal]] | |||
Revision as of 16:45, 16 January 2011
Eddy Viscosity
Eddy Viscosity in CMS-Flow is not a user definable parameter. A description of the advanced cards related to eddy viscosity is shown in the table below.
| Card | Arguments | Default | Range | Description | Versions |
|---|---|---|---|---|---|
| TURBULENCE_MODEL | CHARACTER | SUBGRID | SUBGRID |FALCONER| PARABOLIC | MIXING-LENGTH | Specifies the turbulence model used | >=3.5 |
| EDDY_VISCOSITY_CONSTANT | REAL | 1.0E-6 | >=1.0E-6 | Constant contribution or base value of eddy viscosity | >=3.5 |
| EDDY_VISCOSITY_BOTTOM | REAL | 0.0667 | 0.01-0.2 | Coefficient related to the contribution to eddy viscosity from the bottom shear | >=3.5 |
| EDDY_VISCOSITY_HORIZONTAL | REAL | 0.4 | 0.2-0.6 | Coefficient related to the contribution to eddy viscosity from horizontal velocity gradients | >=3.5 |
| EDDY_VISCOSITY_WAVE | REAL | 0.5 | 0.2-1.0 | Coefficient related to the wave bottom friction contribution to eddy viscosity | >=4.0 |
| EDDY_VISCOSITY_BREAKING | REAL | 0.05 | 0.04-0.08 | Coefficient related to the wave breaking contribution to eddy viscosity | >=4.0 |
More information can be found here.