"$CourantFactor" 修訂間的差異
出自 DDCC TCAD TOOL Manual
(已建立頁面，內容為 "=='''Format'''== $CourantFactor ''fp'' <font color=green>// where ''fp'' is an floating point and <math>\begin{smallmatrix}{\color{PineGreen}fp\; \...") |
(→Format) |
||
| (未顯示同一使用者於中間所作的 9 次修訂) | |||
| 行 1： | 行 1： | ||
=='''Format'''== |
=='''Format'''== |
||
$CourantFactor |
$CourantFactor |
||
| − | '' |
+ | ''S'' <font color=green>// where ''S'' is an floating point and <math>\begin{smallmatrix}{\color{OliveGreen}S\ \leq\ 1.0}\end{smallmatrix}</math>.</font> |
<font size=3> |
<font size=3> |
||
| − | Source%dir, Source%posi. |
||
| + | <math>\Delta t = \frac{S}{c\sqrt{\frac{1}{{\Delta x}^2}+\frac{1}{{\Delta y}^2}+\frac{1}{{\Delta z}^2}}}</math> |
||
| + | |||
| + | Where ''c'' is the light speed in the vacuum, you can see more details in Eq. 4.60. <br><br> |
||
| + | The default value is 0.999999. <br><br> |
||
| + | '''Note:''' The definition of ''S'' here is '''NOT''' same as the Courant stability limit in the reference. |
||
</font> |
</font> |
||
=='''Example'''== |
=='''Example'''== |
||
$CourantFactor |
$CourantFactor |
||
| − | 3 1500e-9 |
||
| + | 0.999 |
||
| − | This means the program has 2 objects in the simulation. |
||
| + | Then ''S'' will be 0.999. |
||
於 2018年7月25日 (三) 15:27 的最新修訂
Format
$CourantFactor S // where S is an floating point and.
Where c is the light speed in the vacuum, you can see more details in Eq. 4.60.
The default value is 0.999999.
Note: The definition of S here is NOT same as the Courant stability limit in the reference.
Example
$CourantFactor 0.999
Then S will be 0.999.
