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Old   February 2, 2013, 14:28
Question To output the RANS local mean velocity(Reynolds averaged)
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Meimei Tian
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Hi,

I'd like to use the local mean velocity to compute the turbulence intensity of one surface. May I ask could CFX-post output local mean velocity(Reynolds averaged) directly?
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Old   February 3, 2013, 06:05
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If you are using a RANS turbulence model with an incompressible fluid then the velocities reported are Reynolds averaged velocities. If you are doing a LES or DNS model then you have to be a bit more sophistocated, but I won't go into that unless you actually are doing LES or DNS.

If you are doing a RANS turbulence model with a compressible fluid then the velocities are Fauve averaged.
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Old   February 9, 2013, 20:01
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Turbulence Intensity at a surface? Velocity at your surface will be 0, and near the wall the flow will be laminar.
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Old   February 10, 2013, 05:30
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I presume the surface she is talking about is defined in CFD-Post across the flow. Because, yes, the turbulence on a wall is zero.
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Old   February 10, 2013, 14:54
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Quote:
Originally Posted by evcelica View Post
Turbulence Intensity at a surface? Velocity at your surface will be 0, and near the wall the flow will be laminar.
Sorry. The 'surface' I mentioned is defined in CFX-post. It's not the wall.
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