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Why is the side slip option only for compressible flows

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Old   March 7, 2015, 06:59
Default Why is the side slip option only for compressible flows
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denzell
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Hi,

I was wondering why the side slip option is available only for compressible flows?

Is there a workaround for this in order to simulate side-slip simulations for e.g. cars which operate in the incompressible fluid regime?

Thank you

--Denzell
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Old   March 10, 2015, 20:26
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hlk
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Quote:
Originally Posted by denzell View Post
Hi,

I was wondering why the side slip option is available only for compressible flows?

Is there a workaround for this in order to simulate side-slip simulations for e.g. cars which operate in the incompressible fluid regime?

Thank you

--Denzell
If it's not currently supported in the code the work-around would be to look closely at the incompressible solver class and find out if the initial/farfield conditions can be modified to change the incoming flow angle.
If you only have one angle to simulate, you could also make your mesh tilted relative to the x direction.
If you don't want to do that, however, you might be able to simulated the incompressible fluid regime with the compressible solver - physically, flow around a car is compressible - it's just that the compressible terms are negligible and can be left out. I don't have experience with simulating that regime personally, I suppose it could be possible that numerical errors could accumulate for that case (ie, gradients of density being close to machine precision), or another issue that I'm not aware of.
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