Différences

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

--- sunfluidh:meshgen_doc [2017/12/02 15:28] – yann
+++ sunfluidh:meshgen_doc [2017/12/02 16:33] – yann
@@ Ligne 21: / Ligne 21: @@
    * go to the directory MESHGEN/TRUNK/SOURCES
    * Run the command make: The executable file meshgen.x is created.
+==== Meshgen settings ====
+The grid parameters are set in the input data file "data_meshgen.dat". A simple example of a 2D grid is given just below :
+   * The cell size is variable along the I-direction.
+     * The I-line is split in two equal parts.
+     * The function "TANH_ONE_SIDE" is applied over each part, with a reverse distribution over the 2nd part. This way is useful to define a perfect symmetrical distribution in regard to the mid-plane.
+   * The grid is regular along the J-direction
+<file txt data_meshgen.dat>
+==============================================================================================================
+            DATA FILE FOR THE MESH GENERATOR MESHGEN (DESCRIPTIONS OF DATA ARE GIVEN BELOW)
+==============================================================================================================
+-------------------------------------------------------------------------------------------------------------
+Blocks of data are associated to segments along a specific direction (There are as many blocks as segments)
+See below the TEMPLATES to select your own block of data associated to the selected distribution law)
+-------------------------------------------------------------------------------------------------------------
+---------------------------------------
+I-DIRECTION
+---------------------------------------
+Choice of the metric system :  in meter or dimensionless  (0)  - angular in degrees (1)     :
+&METRIC_UNIT         Type_of_Metric= 0 /
+&MESH_FUNCTION_DATA Function_Name="TANH_ONE_SIDE" Number_of_Cells= 64   Length= 0.5  Left_Cell_Size= 1.2d-03 Reverse_Ordering= .false. /
+&MESH_FUNCTION_DATA Function_Name="TANH_ONE_SIDE" Number_of_Cells= 64   Length= 0.5  Left_Cell_Size= 1.2d-03 Reverse_Ordering= .true. /
+&MESH_FUNCTION_DATA End_of_Data_Block = .true./
+---------------------------------------
+J-DIRECTION
+---------------------------------------
+Choice of the metric system :  in meter or dimensionless  (0)  - angular in degrees (1)     :
+&METRIC_UNIT         Type_of_Metric= 0 /
+&MESH_FUNCTION_DATA  Function_Name="REGULAR"           Number_of_Cells= 128  Length= 1.0   Reverse_Ordering= .false. /
+&MESH_FUNCTION_DATA End_of_Data_Block = .true./
+---------------------------------------
+K-DIRECTION
+---------------------------------------
+&MESH_FUNCTION_DATA End_of_Data_Block = .true./
+END OF FILE
+</file>
+==== Data set description ====
+In the data file, each block of data is attributed to a direction (I,J or K).\\
+Each direction can be split in several parts (segments) on which a specific distribution law is applied in order to place the discrete nodes.\\
+Each distribution law is associated to a function defined by a namelist. The available functions are :
+   * Regular function (Function_name= REGULAR_MESH)
+   * Hyperbolic tangent function "one side" (Function_Name= TANH_ONE_SIDE_MESH)
+   * Hyperbolic tangent function "two sides" (Function_Name= TANH_TWO_SIDES_MESH)
+   * Gauss-Lobatto distribution (Function_Name= GAUSS_LOBATTO_MESH)
+   * Geometric series "type 1" (Function_Name= GEOMETRIC_SERIE_1_MESH)
+   * Geometric series "type 2" (Function_Name= GEOMETRIC_SERIE_2_MESH)
+These functions get a specific data set :
+   * Number_of_Cells : Number of cells over the segment (for all functions).
+   * Length          : Length of the segment (for all functions).
+   * Left_Cell_Size  : Reference size of the cell placed at the left tip of the segment (for all functions except the regular function)
+   * Right_Cell_Size : Reference size of the cell placed at the right tip of the segment (for hyperbolic function "two sides" and geometric series "Type 1" only)
+   * Reverse_Ordering : Reverse the ordering of the distribution if set to .true.
+   * End_of_Block_Data : logical set to .true. to declare the end of a data structure (by default it set to .false. by the program)