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setting the inlet for turbulent boundary layer profile

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Old   February 9, 2021, 16:38
Default setting the inlet for turbulent boundary layer profile
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Zhijian Yan
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Dear all
Hello. I am currently trying to simulate an unbounded turbulent boundary profile with Fluent. my computation domain is 2D rectagular and I imposed an uniform inlet velocity of 1.8 Mach. with the upper and latter boundary set to be pressure outlet, the bottom be the wall.

the first simulation was good. a mach wave generated at the starting of the wall. I export the outlet profile document and set it as an inlet condition for the next simulation to get a more developed boundary layer profile. However, in the next simulation, another pressure wave appears at the start point of the wall, which should not exist.

can someone help me with this? how can i set a developed turbulent boundary profile at the inlet?

I use the K-epilson model and i set the second simulation`s inlet velocity condition and the pressure & temperature & k and eplison from the first simulation outlet profile. but an abnormal pressure wave appears at the start of wall. i hope i can get rid of the wave
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turbulent boundary layer

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