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...")
 
(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.


<br style="clear:both" />
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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>|</nowiki>FALCONER<nowiki>| </nowiki>PARABOLIC <nowiki>| </nowiki>MIXING-LENGTH || Specifies the turbulence model used || >=3.5
|TURBULENCE_MODEL || CHARACTER|| SUBGRID || SUBGRID nowiki|/nowikiFALCONERnowiki| /nowikiPARABOLIC nowiki| /nowikiMIXING-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''']].

Revision as of 16:44, 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.

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Card Arguments Default Range Description Versions
TURBULENCE_MODEL CHARACTER SUBGRID /nowikiFALCONERnowiki| /nowikiPARABOLIC nowiki| /nowikiMIXING-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.