Différences

Ci-dessous, les différences entre deux révisions de la page.

--- sunfluidh:outlet_boundary_conditions_setup_namelist [2016/11/13 15:12] – yann
+++ sunfluidh:outlet_boundary_conditions_setup_namelist [2016/11/29 15:34] (Version actuelle) – [Pressure_Reference_Value] yann
@@ Ligne 1: / Ligne 1: @@
 ===== Outlet_Boundary_Condition =====
-This data setup are used to define the inflow condition features. The inflow geometry is restricted to rectangular/line forms in 3D/2D configuration. In the particular case of cylindrical geometries, the outlets can be circular, annular or bowed retangular. In fact, the geometry of the outlet fits the grid topology.\\
+This data setup are used to define the outflow condition features. The outflow geometry is restricted to rectangular/line forms in 3D/2D configuration. In the particular case of cylindrical geometries, the outlets can be circular, annular or bowed rectangular. In fact, the geometry of the outlet fits the grid topology.\\
-Whatever the grid topology, the orientation and the span of the inflow are defined by means of :
-   * the normal vector of the outlet plane associated to a specific direction (I,J or K)
+===== Full data set of the namelist =====
-   * the coordinates associated to the position of the outlet sides along the two perpendicular directions to the normal vector (denoted the first and second span directions).\\
-When the normal vector is oriented along the I-direction, the first span direction is J and the second is K. \\
+    &Outlet_Boundary_Conditions
-When the the normal vector is oriented along the J-direction, the first span direction is I and the second is K. \\
+     Type_of_BC= "OUTLET", Direction_Normal_Plan= 1 ,
-When the the normal vector is oriented along the K-direction, the first span direction is I and the second is J.\\
+     Plan_Location_Coordinate= -0.05   ,
-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.
+     Start_Coordinate_of_First_Span = -0.01, End_Coordinate_of_First_Span = 0.01,
+     Start_Coordinate_of_Second_Span= 0.0  , End_Coordinate_of_Second_Span= 0.0 ,
+     Pressure_Reference_Value       = 0.0    ,  Length_Scale                 = 1.0  ,
+     Flow_Direction= 1 ,
+     End_of_Data_Block= .true. /
+<note important>
+   * Whatever the grid topology, the orientation and the span of the outflow are defined by means of :
+    * the normal vector of the outlet plane associated to a specific direction (I,J or K).
+    * the coordinates associated to the position of the outlet sides along the two perpendicular directions to the normal vector (denoted the first and second span directions).
+   * When the normal vector is oriented along the I-direction, the first span direction is J and the second is K.
+   * When the the normal vector is oriented along the J-direction, the first span direction is I and the second is K.
+   * When the the normal vector is oriented along the K-direction, the first span direction is I and the second is J.
+   * 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.
+Find some examples [[Inlet_Outlet_Boundary_Conditions_Examples|here]] about outflow configurations.
+</note>
+-----
+===== Definition of the data set =====
 -----
 ==== Type_of_BC ====
@@ Ligne 13: / Ligne 33: @@
    * 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.
-     * 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 (__** Not for the release SUNFLUIDH_EDU**__ ).
-     * 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 =====
@@ Ligne 44: / Ligne 64: @@
    * 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 ====
-   * Type : Real value
+   * Type : Real value (__** Not for the release SUNFLUIDH_EDU**__ )
-   * Reference value of the imposed pressure used when "OUT_PF" or "FREEBC" condition is used. This data is omitted when the "OUTLET" condition is used. At present, it is advised to set the pressure reference value to zero.
+   * Reference value of the imposed dynamical pressure used when "OUT_PF" or "FREEBC" condition is used. This data is omitted when the "OUTLET" condition is used. At present, it is advised to set the pressure reference value to zero.
 ==== 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 "FREEBC" condition is used. This data is omitted when the "OUTLET" or the "OUT_PF" condition is used.
 ==== End_of_Data_Block ====
    * Type : boolean value
    * Specify the end of the namelist or a group of this type of namelist (if true).