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"High Mach Number flow exists"--tho i m running the sim at 5m/s.

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Old   August 13, 2018, 08:09
Default vortex problem
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Shahzad
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hello sir,
does this vortex problem affects the results?
thank you
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Old   August 13, 2018, 11:12
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Yes, that's why there is a warning.
Some result parameters might not be affected but others are.
For example, the pressure opening is defined with a specific pressure and temperature. That temperature is only valid if there is an inflow, then this temperature is used for the inflow. If you have heated air leaving the pressure opening but cooler air coming in through it due to the vortex in the opening, then the average air temperature at the opening will be lower as the vortex causes this issue.

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Old   August 14, 2018, 04:02
Default supersonic flow problem
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hello sir ,


you helped me alot sir in my project .



does supersonic flow problem depends on my boundary conditions ?
sometimes there is no this warning at some specific values as i am increasing flow rate or rpm ,this problem appears .



please suggest me how to get rid of this problem , as i think this is last problem which iam facing.


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Old   August 17, 2018, 10:01
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You don't need to worry about the high mach number option in your case. This is still good.
Reason is that the low compressible solver works good enough for a certain range over Mach 1-2.

Which method did you use, sliding or averaging?

Boris
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Old   August 18, 2018, 01:25
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hello sir ,
iam using averaging method
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Old   August 30, 2018, 08:23
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Ok, then this should work just fine as it is.

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