Calculate time step based on a given CFL condition for a cube in a linear Euler simulation.
This subroutine calculates the timstep according to the CFL condition. Please notice, that this routine can be applied for linear Euler 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(3) | 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 |
| Type | Visibility | Attributes | Name | Initial | |||
|---|---|---|---|---|---|---|---|
| real(kind=rk), | private | :: | max_vel |