Différences

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

--- sunfluidh:th2s_meshgen [2017/12/02 21:58] – yann
+++ sunfluidh:th2s_meshgen [2017/12/03 16:37] (Version actuelle) – yann
@@ Ligne 4: / Ligne 4: @@
 -----
+__ Description:__
+Function with an extremum. \\
+Cell size is refined at left and right tips of the segment.\\
+__Namelist :__
+   &MESH_FUNCTION_DATA  Function_Name="TANH_TWO_SIDES"  ,
+                        Number_of_Cells= 32 ,
+                        Length= 1.0  ,
+                        Left_Cell_Size= 2.0d-02 ,
+                        Right_Cell_Size= 3.0d-02 ,
+                        Reverse_Ordering= .false. /
+__Cell size distribution h(l) :__
+$L$ is the Length.\\
+$N$ is the Number_of_Cells}.\\
+$\alpha(l)$ is function of Left_Cell_Size and Right_Cell_Size.\\
+$x(l)$ is the coordinate.\\
+$h(l)$ is the cell size.\\
+$l$ is the cell index.\\
 \begin{align*}
-h(1)&= 0 \\
+x(1)&= 0 \\
-h(l)&=\frac{1}{2}(1 + \tanh( \alpha(\frac{l-1}{N})-\frac{1}{2})/\tanh(\frac{1}{2}) \beta), 2 \leq l \leq N\\
+F(l)&=\frac{1}{2}(1 + \tanh( \alpha(l)(\frac{l-1}{N})-\frac{1}{2})/\tanh(\frac{1}{2}) \alpha(l)), 2 \leq l \leq N+1\\
-h(l)&= L \cdot (\frac{F(l)}{\alpha + (1- \alpha) F(l)})\\
+x(l)&= L \cdot (\frac{F(l)}{\alpha(l) + (1- \alpha(l)) F(l)})\\
-h(N+1)&= L
+x(N+1)&= L \\
+h(l)&= x(l+1)-x(l)\\
 \end{align*}
-$L=\text{Length}$\\
-$N=\text{Number_of_Cells}$\\
-$h_{min1}=\text{Left_Cell_Size}$\\
-$h_{min2}=\text{Right_Cell_Size}$\\
-$\alpha$ and $\beta$ are functions of $h_{min1}$ and $h_{min2}$.