sunfluidh:sgs_model_setup_namelist
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Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédenteDernière révisionLes deux révisions suivantes | ||
sunfluidh:sgs_model_setup_namelist [2016/11/11 14:10] – yann | sunfluidh:sgs_model_setup_namelist [2016/11/11 15:28] – yann | ||
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This data setup allows the user to use a LES subgrid model to modelize the subgrid scales effects of turbulence.\\ | This data setup allows the user to use a LES subgrid model to modelize the subgrid scales effects of turbulence.\\ | ||
The different models are proposed here to take into account the dynamical scales and the thermal scales (when heat transfer is considered). Some LES models results from the research performed at LIMSI. Their use depends on the type of flow considered. | The different models are proposed here to take into account the dynamical scales and the thermal scales (when heat transfer is considered). Some LES models results from the research performed at LIMSI. Their use depends on the type of flow considered. | ||
+ | ----- | ||
+ | ==== Types and definitions of the data setup ==== | ||
+ | ----- | ||
==== LES_Enabled ==== | ==== LES_Enabled ==== | ||
* Type : boolean value | * Type : boolean value | ||
Ligne 28: | Ligne 30: | ||
==== Constant_Kinematic_Model ==== | ==== Constant_Kinematic_Model ==== | ||
* Type : real value | * Type : real value | ||
+ | * This is the reference value of the constant parameter that is used in LES models related to the momentum equations. See the literature in relation with your simulation case in order to define the suitable constant. | ||
==== Constant_Thermal_Model ==== | ==== Constant_Thermal_Model ==== | ||
* Type : real value | * Type : real value | ||
+ | * This is the reference value of the constant parameter that is used in LES models related to the enthalpy equation. See the literature in relation with your simulation case in order to define the suitable constant. | ||
==== Weight_Of_Grid_Filtering ==== | ==== Weight_Of_Grid_Filtering ==== | ||
* Type : real value | * Type : real value | ||
+ | * This parameter is associated to the length-scale of the filter chosen in some LES models such as dynamic models or mixed-scales models in order to estimate the subgrid turbulence scales. By considering $\Delta$ as the grid length scale and $\hat{\Delta}$ as the filter length scale, the most classical values of the parameter are : | ||
+ | * Weight_Of_Grid_Filtering= 2.0 : $\hat{\Delta}= \sqrt{6}.\Delta$ | ||
+ | * Weight_Of_Grid_Filtering= 4.0 : $\hat{\Delta}= 2.\Delta$ | ||
+ | * Weight_Of_Grid_Filtering= 6.0 : $\hat{\Delta}= \sqrt{3}.\Delta$ | ||
+ |
sunfluidh/sgs_model_setup_namelist.txt · Dernière modification : 2016/11/28 17:50 de yann