Différences

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

--- sunfluidh:meshgen_doc [2017/12/03 17:11] – yann
+++ sunfluidh:meshgen_doc [2020/10/27 16:31] (Version actuelle) – yann
@@ Ligne 6: / Ligne 6: @@
   * Following the CFD code used, these nodes have different definitions :
     * For Chorus, they are the cell centers.
-    * For Sunfluidh, they are the cell-face locations.
+    * For Sunfluidh, they are the cell-face locations ($x_i, y_i, z_i$ see [[sunfluidh:sunfluidh_tools|the page "Overview ...", section "stagerred grid"]] for more details).
   * Several distribution laws are available :
     * Geometric functions
@@ Ligne 15: / Ligne 15: @@
 <note important>
- **For the class 5AF32, this step is automatically made by the install procedure.**
+ **For Sorbonne universite class, this step is automatically made by the install procedure.**
 </note>
-After downloading the Meshgen project from the server forge by means of svn:
+After downloading the Meshgen project from the server forge by means of svn (svn co –username your_login https://forge.limsi.fr/svn/MESHGEN/TRUNK)
    * go to the directory MESHGEN/TRUNK/SOURCES
    * Run the command make: The executable file meshgen.x is created.
@@ Ligne 30: / Ligne 30: @@
 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 defined by means of namelists that are described at the end of this page. The available functions are (click on it for details):
+Each distribution law is defined by means of namelists that are described at the end of this page.\\
-   * [[Reg_fct_meshgen | Regular function]] (Function_name= REGULAR_MESH)
+For illustrating how that works, let consider a domain length $L$ (in an arbitrary direction) split in $2$ parts with lengths $L_1$ and $L_2$, respectively (see the figure below). Discrete coordinates are distributed with a given law (by considering here $N_1=6$ for the first segment, $N_2=8$ for the second one). \\ The origin coordinate is not included in the procedure. It is added by the code.\\ The coordinate located at the upper end of the segment belongs to this segment, not to the following one.
-   * [[TH1S_meshgen |Hyperbolic tangent function "one side"]] (Function_Name= TANH_ONE_SIDE_MESH)
+{{ :sunfluidh:mesh_distribution_1.jpg?direct&600 |}}
-   * [[TH2S_meshgen |Hyperbolic tangent function "two sides"]] (Function_Name= TANH_TWO_SIDES_MESH)
-   * [[GL_meshgen | Gauss-Lobatto distribution ]](Function_Name= GAUSS_LOBATTO_MESH)
-   * [[geom1_meshgen | Geometric series "type 1"]] (Function_Name= GEOMETRIC_SERIE_1_MESH)
-   * [[geom2_meshgen | 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).
+The available distribution functions are (click on function name to get details):
-   * Length          : Length of the segment (for all functions).
+   * [[Reg_fct_meshgen | Regular function]] (Function_name= REGULAR)
-   * Left_Cell_Size  : Reference size of the cell placed at the left tip of the segment (for all functions except the regular function and geometric series "Type 1")
+   * [[TH1S_meshgen |Hyperbolic tangent function "one side"]] (Function_Name= TANH_ONE_SIDE)
-   * Right_Cell_Size : Reference size of the cell placed at the right tip of the segment (for hyperbolic function "two sides" only)
+   * [[TH2S_meshgen |Hyperbolic tangent function "two sides"]] (Function_Name= TANH_TWO_SIDES)
-   * Reverse_Ordering : Reverse the ordering of the distribution if set to .true.
+   * [[GL_meshgen | Gauss-Lobatto distribution ]](Function_Name= GAUSS_LOBATTO)
-   * 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)
+   * [[geom1_meshgen | Geometric series "type 1"]] (Function_Name= GEOMETRIC_SERIE_1)
+   * [[geom2_meshgen | Geometric series "type 2"]] (Function_Name= GEOMETRIC_SERIE_2)
+These functions get some parameters :
+   * **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 and geometric series "Type 1")
+   * **Right_Cell_Size** : Reference size of the cell placed at the right tip of the segment (for hyperbolic function "two sides" only)
+   * **Reverse_Ordering** : Reverse the ordering of the distribution if set to .true.
+   * **End_of_Block_Data** : logical set to .true. to specify the end of a data structure (by default it set to .false. by the program)
 __A template is provided **[[meshgen_templates|here]]**__.
@@ Ligne 60: / Ligne 65: @@
 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
+   * Choice of CFD code : OLORIN or SUNFLUIDH (1) CHORUS (2) ---> choose the correct option
-   * MPI domain decomposition (1) or not (0) ---> write the selected option
+   * MPI domain decomposition (1) or not (0) ---> choose the correct option (if unsure, answer 0)
 For the case of MPI domain decomposition, further information is required to perform the appropriate domain decomposition
@@ Ligne 68: / Ligne 73: @@
      *  In J-direction ---> write the value
      *  In K-direction ---> write the value
+==== Output files ====
 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 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.
+      * __**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 ====