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Old   January 16, 2004, 13:14
Default Exporting shear stress data
  #1
Severo Neto
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I want to obtain the values for shear stress. Ive tried all available options of exporting data in the CFX Solver, with no success. There is another way to get this?

Thanks everybody.
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Old   January 18, 2004, 17:20
Default Re: Exporting shear stress data
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Glenn Horrocks
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Hi Severo,

I you are looking for the wall shear stress there is a variable for that. Exporting wall shear stress should be easy. I have just noticed (to my surprise) that there is no preset variable for the full 3D shear stress field. It looks like in this case you will have to create the variable. Create an expression in Post to evaluate it from the velocity gradient.

Glenn
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Old   February 4, 2004, 07:11
Default Re: Exporting shear stress data
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Drona
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Is velocity gradient availabe as a solved variable? Under what name?

Thanks
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Old   February 4, 2004, 19:54
Default Re: Exporting shear stress data
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Glenn Horrocks
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Hi Drona,

It is accessible in CFX-Post. Press the "..." button next to the variable selector.

Glenn
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Old   February 5, 2004, 10:47
Default Re: Exporting shear stress data
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Drona
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Glenn,

Thanks. So the shear stress for a turbulent flow is:

Tau (x,y,z) = Turbulent/effective viscosity * Velocity gradient(x,y,z) ????

Drona
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