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High inlet Turbulence vs Low inlet Turbulence

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Old   December 2, 2016, 00:03
Default High inlet Turbulence vs Low inlet Turbulence
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Sana Ullah
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Hi everyone,
I am simulating steady state flow around a set of buildings using k epsilon model.
The problem I am facing is that, if I set higher values of inlet turbulence (40%), I get a well converged solution, but incase I use lower values of turbulence (10%), I don't get a stable solution (residuals oscillate irregularly)

What could be the reason?
One probable reason that I found on ANSYS website says that "Higher turbulence at inlet may swamp the boundary layer".

Is there any other explanation to this, or someone can further explain the ANSYS statement.
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cfd analysis, inlet bc, turbulence


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