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Old   March 21, 2003, 00:42
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MADHU BABU
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Dear friends I am using Fluent for my project. I am doing "computational analysis of flow through diffusers for a centrifugal compressor". I am doing 3D analysis. I need to specify the components (Tangential and Radial) of inlet (of diffuser) velocity as a function of z (Vr = Vq = f (z)). So I have to write an UDF. So, can you please send any example which will guide me to write that UDF as early as possible. thanks in advance

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Old   March 25, 2003, 04:03
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Alamgir
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Did u read the udf manual or do u have that one? if not then mail me at the above address I can send to u.

Alamgir
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Old   March 26, 2003, 01:09
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Alamgir
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Dear Madhu,

Check the udf again, it is also for the 3D problem. U have to convert the equations from Cylindrical to Cartetian... and then u can access a component of a gradient vector by specifying it as an argument in the gradient vector call (0 for the x component; 1 for y; and 2 for z). eg: x=x[0]; y=x[1]; and z=x[2], if u carefully see the examples u will get it.

bye

Alamgir
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Old   March 26, 2003, 07:28
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MADHU BABU
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Dear Alamgir thanq for u r response. i will try for .that
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