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ANSYS FLUENT; HIGH VELOCITY FLOWS through pipes

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Old   March 30, 2021, 14:08
Default ANSYS FLUENT; HIGH VELOCITY FLOWS through pipes
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Jack SSIlver
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I am trying to simulate high velocity flows ( 165 m/s) through pipes . However, at the high velocities, I am not getting good results. Can anyone give some advice ? I am using ANSYS FLUENT.
With the LES model, at the lower velocities around ( 60m/s) I am getting goodish results when I take into account the the element size and timestep size. However, at velocities higher than that, I am not getting good results. My model also includes a large about of inflation layers ( approx. 40). I am using tetrahedral elements because I wasn't getting good results with brick elements.
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Old   March 30, 2021, 14:11
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Quote:
Originally Posted by jackss View Post
I am trying to simulate high velocity flows ( 165 m/s) through pipes . However, at the high velocities, I am not getting good results. Can anyone give some advice ? I am using ANSYS FLUENT.
With the LES model, at the lower velocities around ( 60m/s) I am getting goodish results when I take into account the the element size and timestep size. However, at velocities higher than that, I am not getting good results. My model also includes a large about of inflation layers ( approx. 40). I am using tetrahedral elements because I wasn't getting good results with brick elements.
What is the y+ of your mesh?
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Old   March 30, 2021, 16:24
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less than 1 ... around 0.01 or so
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