Turbulence Model (2D) Data Fields
Turbulence Model (2D) data can be edited on either the Turbulence Model (2D) Grid Window of the Polygons Grid or the Turbulence Model (2D) Property Sheet.
Most data can be edited on the grid, but some fields cannot be displayed in the grid format.
To view and edit all zone data, use the Property Sheet.
The following describes all the data which can be used to define a Turbulence Model (2D).
Common Data Fields Fields that are common to the majority of objects can be found in the Common Fields topic.
Turbulence Model (2D) Data
Database Table Name: hw_2d_turbulence_model
|
Field Name |
Help Text |
Database Field |
Size |
Precision |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
ID |
The name of the turbulence model (2D). |
model_id |
Text |
64 |
|
0 |
|
|
|
|
|
| Constant eddy viscosity |
An offset parameter for the eddy viscosity. A non-negative numeric value which is used as the coefficient when calculating the constant eddy viscosity. The default value is 0. |
const_eddy_visc |
Double |
|
VI |
3 |
0 |
0 |
|
|
|
| Vertical eddy viscosity equation | Determines the method (if any) that is to be used to calculate the turbulence generated by bed friction. | vert_eddy_visc_equn | Text | 10 | 0 | None | |||||
| Parabolic eddy viscosity coefficient |
Enabled if the Vertical eddy viscosity equation field is set to Parabolic. A non-negative numeric value which is to be used as the coefficient when calculating the horizontal eddy viscosity using the parabolic model. The default value is 1. |
parab_eddy_visc_coeff | Double | 3 | 1 | 0 | 100 | ||||
| Horizontal eddy viscosity equation | Determines which method (if any) is to be used to calculate the turbulence which occurs as a result of horizontal shear stresses generated by spatial gradients in the velocity field. | horz_eddy_visc_equn | Text | 15 | 0 | None | |||||
| Mixing length eddy viscosity coefficient |
Enabled if the Horizontal eddy viscosity equation field is set to Mixing length. A non-negative numeric value which is to be used as the coefficient when calculating the horizontal eddy viscosity using the mixed length approach. The default value is 1. |
mix_eddy_visc_coeff | Double | 3 | 1 | 0 | |||||
| Smagorinsky eddy viscosity coefficient |
Enabled if the Horizontal eddy viscosity equation field is set to Smagorinsky. A non-negative numeric value which is to be used as the coefficient when calculating the horizontal eddy viscosity using the Smagorinsky approach. The default value is 0.17. |
smag_eddy_visc_coeff | Double | 3 | 0.17 | 0 |
