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To output the RANS local mean velocity(Reynolds averaged) |
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February 2, 2013, 14:28 |
To output the RANS local mean velocity(Reynolds averaged)
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#1 |
Senior Member
Meimei Wang
Join Date: Jul 2012
Posts: 494
Rep Power: 15 |
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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Best regards, Meimei |
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February 3, 2013, 06:05 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,655
Rep Power: 143 |
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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February 9, 2013, 20:01 |
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#3 |
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Erik
Join Date: Feb 2011
Location: Earth (Land portion)
Posts: 1,162
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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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February 10, 2013, 05:30 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,655
Rep Power: 143 |
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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February 10, 2013, 14:54 |
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#5 |
Senior Member
Meimei Wang
Join Date: Jul 2012
Posts: 494
Rep Power: 15 |
Sorry. The 'surface' I mentioned is defined in CFX-post. It's not the wall.
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