「$CourantFactor」：修訂間差異
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=='''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> | ||
<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> | |||
The default value is 0.999999. <br> | |||
'''Note:''' ''S'' is not equal to the courant number. | |||
</font> | </font> | ||
=='''Example'''== | |||
$CourantFactor | |||
0.999 | |||
Then ''S'' will be 0.999. | |||
=='''Example'''== | =='''Example'''== | ||
於 2018年7月12日 (四) 01:54 的修訂
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: S is not equal to the courant number.
Example
$CourantFactor 0.999
Then S will be 0.999.
Example
$CourantFactor 3 1500e-9
This means the program has 2 objects in the simulation.