TUFLOW Message 3008: Difference between revisions
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''PRANDTL turbulence model:''<br> |
''PRANDTL turbulence model:''<br> |
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If the PRANDTL turbulence model is selected, the viscosity is modelled based on the turbulence length scale '' |
If the PRANDTL turbulence model is selected, the viscosity is modelled based on the turbulence length scale ''l'' and the turbulence intensity ''k'' as follows:<br> |
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[[File:PRANDTL.png | 150px]] |
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where ''Cc (nut_c)'' is a constant component of the viscosity, and the maximum value of '' |
where ''Cc (nut_c)'' is a constant component of the viscosity, and the maximum value of ''l'' is limited by ''Cm * depth'', where ''Cm (nut_m)'' is a coefficient to define the turbulence length scale. |
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|suggestions=Make sure the parameters specified by the <font color="blue"><tt>Viscosity Coefficients </tt></font> <font color="red"><tt>== </tt></font> command is larger than zero. |
|suggestions=Make sure the parameters specified by the <font color="blue"><tt>Viscosity Coefficients </tt></font> <font color="red"><tt>== </tt></font> command is larger than zero. |
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Revision as of 16:02, 16 July 2018
TUFLOW Message
ERROR 3008: nut_m must be >= 0.
ERROR 3008: nut_c must be >= 0
Alternate Message
Message Type
ERROR
Description
SMAGORINSKY turbulence model:
When SMAGORINSKY turbulence model is used, nut_m is the Smagorinsky coefficient and nut_c is a constant eddy viscosity component. These two parameter must be >=0.
PRANDTL turbulence model:
If the PRANDTL turbulence model is selected, the viscosity is modelled based on the turbulence length scale l and the turbulence intensity k as follows:
where Cc (nut_c) is a constant component of the viscosity, and the maximum value of l is limited by Cm * depth, where Cm (nut_m) is a coefficient to define the turbulence length scale.
Suggestions
Make sure the parameters specified by the Viscosity Coefficients == command is larger than zero.
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