Différences

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

--- sunfluidh:meshgen_doc [2017/12/02 16:47] – yann
+++ sunfluidh:meshgen_doc [2017/12/03 00:33] – [Templates for each function] yann
@@ Ligne 69: / Ligne 69: @@
 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 :
+Each distribution law is defined by means of namelists that are described at the end of this page. The available functions are (click on it for details):
-   * Regular function (Function_name= REGULAR_MESH)
+   * [[Reg_fct_meshgen | Regular function]] (Function_name= REGULAR_MESH)
-   * Hyperbolic tangent function "one side" (Function_Name= TANH_ONE_SIDE_MESH)
+   * [[TH1S_meshgen |Hyperbolic tangent function "one side"]] (Function_Name= TANH_ONE_SIDE_MESH)
-   * Hyperbolic tangent function "two sides" (Function_Name= TANH_TWO_SIDES_MESH)
+   * [[TH2S_meshgen |Hyperbolic tangent function "two sides"]] (Function_Name= TANH_TWO_SIDES_MESH)
-   * Gauss-Lobatto distribution (Function_Name= GAUSS_LOBATTO_MESH)
+   * [[GL_meshgen | Gauss-Lobatto distribution ]](Function_Name= GAUSS_LOBATTO_MESH)
-   * Geometric series "type 1" (Function_Name= GEOMETRIC_SERIE_1_MESH)
+   * [[geom1_meshgen | Geometric series "type 1"]] (Function_Name= GEOMETRIC_SERIE_1_MESH)
-   * Geometric series "type 2" (Function_Name= GEOMETRIC_SERIE_2_MESH)
+   * [[geom2_meshgen | Geometric series "type 2"]] (Function_Name= GEOMETRIC_SERIE_2_MESH)
 These functions get a specific data set :
@@ Ligne 85: / Ligne 85: @@
    * 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)
-__**A complete template is provided at the end of this page.**__
+__A complete template is provided below.__
 <note important>
@@ Ligne 93: / Ligne 93: @@
 The block of data must be closed with the special namelist \\ &MESH_FUNCTION_DATA End_of_Data_Block = .true./
 </note>
-==== Template for each function ====
+==== Templates for each function ====
 <file template>
 &METRIC_UNIT Type_of_Metric= 0 /         ---> Used to define the metric unit
 &MESH_FUNCTION_DATA  Function_Name="GAUSS_LOBATTO"     Number_of_Cells= 30   Length= 1.0                                                    Reverse_Ordering= .false. /
 &MESH_FUNCTION_DATA  Function_Name="TANH_ONE_SIDE"     Number_of_Cells= 40   Length= 1.0  Left_Cell_Size= 1.0d-03                           Reverse_Ordering= .false. /
-&MESH_FUNCTION_DATA  Function_Name="GEOMETRIC_SERIE_1" Number_of_Cells= 60   Length= 1.0  Left_Cell_Size= 1.0d-02  Cell_Ratio= 1.05d-00     Reverse_Ordering= .false. /
+&MESH_FUNCTION_DATA  Function_Name="GEOMETRIC_SERIE_1" Number_of_Cells= 60   Length= 1.0  Cell_Ratio= 1.05d-00     Reverse_Ordering= .false. /
 &MESH_FUNCTION_DATA  Function_Name="REGULAR"           Number_of_Cells= 100  Length= 1.0                                                    Reverse_Ordering= .false. /
 &MESH_FUNCTION_DATA  Function_Name="TANH_TWO_SIDES"    Number_of_Cells= 100  Length= 1.0  Left_Cell_Size= 1.0d-02  Right_Cell_Size= 1.0d-02 Reverse_Ordering= .false. /
@@ Ligne 105: / Ligne 105: @@
 &MESH_FUNCTION_DATA  End_of_Data_Block= .true.        /
 </file>
+==== Generate the grid with Meshgen ====
+After setting the data set in the file "data_meshgen.dat", run the command "meshgen.x".
+Few questions are asked :
+   * Choice of CFD code : OLORIN or SUNFLUIDH (1) CHORUS (2) ---> tape the correct option
+   * MPI domain decomposition (1) or not (0) ---> write the selected option
+For the case of MPI domain decomposition, further information is required to perform the appropriate domain decomposition
+   * number of domain decomposition per direction
+     *  In I-direction ---> write the value
+     *  In J-direction ---> write the value
+     *  In K-direction ---> write the value
+The grid data are recorded in the appropriate files that depend on the code previously selected:
+    * For Chorus, maille_yyyyy.dat : data are recorded in binary format. "yyyyy" is the number of the associated subdomain.
+    * For sunfluidh :
+      * For sequential computation, maillx.d, mailly.d, maillz.d (one file per direction): data are recorded in ASCII format and ordered in two colums, the first one is the cell-index, the second one is the coordinate of the upper face of the cell.Be careful, by default the first index starts at 2. The first coordinate is directly provided by the code.
+      * For domain decomposition (MPI parallelization), maillx_yyyyy.d, mailly_yyyyy.d and maillz_yyyyy.d (one file per direction): data are recorded in ASCII format and ordered in two colums, the first one is the cell-index, the second one is the coordinate of the upper face of the cell.
+==== Check the grid ====
+For checking the grid features, a specific file named "report_meshgen.d" is created in which relevant data about the grid characteristics can be read. \\ Three other files named "check_mesh_I.d", "check_mesh_J.d" and "check_mesh_K.d" are created. They are  similar to "maillx.d", "mailly.d" and "maillz.d" (see above). A 3rd column of data is associated to the cell size.