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Radial and Tangential Velocity boundary conditions

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Old   August 17, 2010, 12:02
Default Radial and Tangential Velocity boundary conditions
N. A.
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Hi Folks,

I have four circular inlets in a cylindrical geometry that gives out inflow at an angle. I am trying to find if there is a way to speificy radial and tangential componets of the velocity and give it as a boundary conditions.
I understand that the normal way of giving is in cartesion approach in (Ux,Uy,Uz) and I am wondering if tehre is a way to give in cylindrical coordinates, viz., (Ur,Ut,Uz) boundary conditions.

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Old   September 16, 2010, 10:48
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oh i have the same problem, and no body answered me a clear answer uptill now
i hope that we will get a quick answer
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Old   December 5, 2010, 14:22
Default Tangential & Axial Velocity Profile
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Do either of you know how to convert from Ux,y,z to tangential and axial velocity's? I am working on a cyclone geometry and would like to convert my results.
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Old   September 2, 2011, 06:38
Default Tangential velocity from cartesian components
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I would like to also know how to transform Cartesian velocity components of Fluent (i.e. Ux, Uy and Uz) into cylindrical components (i.e. axial, tangential and radial)
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Old   September 2, 2011, 07:21
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That can be achieved by an easy space-dependent matrix multiplication. You have to look it up in your favorite linear algebra book how it is done.
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