Difference between revisions of "TUFLOW Message 3008"
| Line 5: | Line 5: | ||
|alt_msg= | |alt_msg= | ||
|type=[[ERROR]] | |type=[[ERROR]] | ||
| − | |message_desc=When | + | |message_desc=''SMAGORINSKY turbulence model:''<br> |
| + | 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.<br><br> | ||
| − | |suggestions= | + | ''PRANDTL turbulence model:''<br> |
| + | If the PRANDTL turbulence model is selected, the viscosity is modelled based on the turbulence length scale ''lm'' and the turbulence intensity ''k'' as follows:<br> | ||
| + | |||
| + | <br> | ||
| + | where ''nut_c'' is a constant component of the viscosity, and the maximum value of ''lm'' is limited by ''nut_m * depth'', where ''nut_m'' is a coefficient to define the turbulence length scale. | ||
| + | |suggestions=Make sure the parameters specified by the '''Viscosity Coefficients''' command is . | ||
|discussion_page=* [[Talk:TUFLOW Message 3008|Discuss Message 3008]] | |discussion_page=* [[Talk:TUFLOW Message 3008|Discuss Message 3008]] | ||
Revision as of 13:55, 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 lm and the turbulence intensity k as follows:
where nut_c is a constant component of the viscosity, and the maximum value of lm is limited by nut_m * depth, where nut_m is a coefficient to define the turbulence length scale.
Suggestions
Make sure the parameters specified by the Viscosity Coefficients command is .
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