Calculate time step based on a given CFL condition for a cube in a linear Euler 2d simulation.
This subroutine calculates the timstep according to the CFL condition. Please notice, that this routine can be applied for linear Euler 2d simulations only.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real(kind=rk), | intent(in) | :: | cfl |
CFL number |
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| real(kind=rk), | intent(in) | :: | length |
Reference length of all elements |
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| real(kind=rk), | intent(in) | :: | vel(2) |
Background velocity in the domain (x,y,z) |
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| real(kind=rk), | intent(in) | :: | SpeedofSound |
Speed of sound, based on background density and pressure |
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| real(kind=rk), | intent(out) | :: | dt |
Resulting time step width |
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| integer, | intent(in) | :: | nPoly |
The number of polynomials per spatial direction |