sunfluidh:outlet_boundary_conditions_setup_namelist
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Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédente | ||
sunfluidh:outlet_boundary_conditions_setup_namelist [2016/11/28 17:11] – yann | sunfluidh:outlet_boundary_conditions_setup_namelist [2016/11/29 15:34] (Version actuelle) – [Pressure_Reference_Value] yann | ||
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===== Outlet_Boundary_Condition ===== | ===== Outlet_Boundary_Condition ===== | ||
- | This data setup are used to define the outflow condition features. The outflow geometry is restricted to rectangular/ | + | This data setup are used to define the outflow condition features. The outflow geometry is restricted to rectangular/ |
===== Full data set of the namelist ===== | ===== Full data set of the namelist ===== | ||
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* When the the normal vector is oriented along the J-direction, | * When the the normal vector is oriented along the J-direction, | ||
* When the the normal vector is oriented along the K-direction, | * When the the normal vector is oriented along the K-direction, | ||
+ | * By default the domain is enclosed. The boundary conditions defined by default at the ends of the domain are walls. When an outlet is placed at the end of the domain, it replaces the wall conditions over the outflow area. | ||
* Don't forget to set the boolean data “End_of_Data_Block” at the end of the namelist. A “.true.” value means the end of the data block when several namelists are used to create several outlets. | * Don't forget to set the boolean data “End_of_Data_Block” at the end of the namelist. A “.true.” value means the end of the data block when several namelists are used to create several outlets. | ||
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* Name to define the outflow boundary conditions type. Three kind of outlet boundary conditions are defined : | * Name to define the outflow boundary conditions type. Three kind of outlet boundary conditions are defined : | ||
* OUTLET : This boundary condition is based on the mass or volumic flowrate conservation to estimate the normal component distribution of the velocity at the outlet. Tangential velocity components are extrapolated and the a zero normal gradient is imposed for the pressure. This boundary condition can be only used if just one outflow is present. | * OUTLET : This boundary condition is based on the mass or volumic flowrate conservation to estimate the normal component distribution of the velocity at the outlet. Tangential velocity components are extrapolated and the a zero normal gradient is imposed for the pressure. This boundary condition can be only used if just one outflow is present. | ||
- | * OUT_PF : The pressure is imposed at the outlet and the normal velocity component is estimated from a simplified Navier-Stokes equation (1D equation along the normal direction of the outlet plan). Tangential velocity components are extrapolated. | + | * OUT_PF : The pressure is imposed at the outlet and the normal velocity component is estimated from a simplified Navier-Stokes equation (1D equation along the normal direction of the outlet plan). Tangential velocity components are extrapolated |
- | * FREEBC : This boundary condition rely on the same concept as the OUT_PF one but the pressure reference-value is imposed at a specific distance behind the outlet plan. | + | * FREEBC : This boundary condition rely on the same concept as the OUT_PF one but the pressure reference-value is imposed at a specific distance behind the outlet plan (__** Not for the release SUNFLUIDH_EDU**__ ). |
==== Direction_Normal_Plan ===== | ==== Direction_Normal_Plan ===== | ||
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* This value is set to 1 or -1. It indicates the presumed direction of the outflow in accordance to the position of the outlet. If the outflow is oriented along the increasing or decreasing index (for a given direction) the value is set to 1 or -1, respectively. | * This value is set to 1 or -1. It indicates the presumed direction of the outflow in accordance to the position of the outlet. If the outflow is oriented along the increasing or decreasing index (for a given direction) the value is set to 1 or -1, respectively. | ||
==== Pressure_Reference_Value ==== | ==== Pressure_Reference_Value ==== | ||
- | * Type : Real value | + | * Type : Real value (__** Not for the release SUNFLUIDH_EDU**__ ) |
- | * Reference value of the imposed pressure used when " | + | * Reference value of the imposed |
==== Length_Scale ==== | ==== Length_Scale ==== | ||
- | * Type : Real value | + | * Type : Real value (__** Not for the release SUNFLUIDH_EDU**__ ) |
* Distance between the outlet plane and the position where the pressure reference value is imposed behind the outlet plane when the " | * Distance between the outlet plane and the position where the pressure reference value is imposed behind the outlet plane when the " | ||
==== End_of_Data_Block ==== | ==== End_of_Data_Block ==== | ||
* Type : boolean value | * Type : boolean value | ||
* Specify the end of the namelist or a group of this type of namelist (if true). | * Specify the end of the namelist or a group of this type of namelist (if true). |
sunfluidh/outlet_boundary_conditions_setup_namelist.1480349476.txt.gz · Dernière modification : 2016/11/28 17:11 de yann