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 October 15, 2001, 09:09 Temperature gradient #1 Michal Guest   Posts: n/a How to obtain a temperature gradient directly from the solver for the UDF purposes? Does any macro exist to compute temperature gradient?

 October 15, 2001, 15:13 Re: Temperature gradient #2 ravi Guest   Posts: n/a C_T_G(c,t)[i] -- cell_t c, Thread *t, int i : gives you temperature gradient component. C_T_G(c,t) -- cell_t c, Thread *t : gives you temperature gradient vector.

 October 16, 2001, 01:26 Re: Temperature gradient #3 Michal Guest   Posts: n/a Thanks very much for Your help!

 October 16, 2001, 06:02 Re: Temperature gradient #4 Greg Perkins Guest   Posts: n/a You may need to be careful when using these macros depending upon what you are doing with them. They are not generally applicable for calculating gradients at faces - ie for flux calculations. As far as I can work out they return the gradients between neighbouring cells in the specified direction. Greg

 October 19, 2001, 04:09 Re: Temperature gradient #5 Michal Guest   Posts: n/a I just only want to check value of temperature gradient at my computational domain but when I use C_UDMI(c,t,i)= C_T_G(c,t)[0]; my UDF is compiled correctly but Fluent send a SEGMENTATION VIOLATION error. What could be a reason of that?

 October 19, 2001, 05:19 Re: Temperature gradient #6 Greg Perkins Guest   Posts: n/a Did you define sufficient space for your udm's??

 October 19, 2001, 05:39 Re: Temperature gradient #7 Michal Guest   Posts: n/a Yes, I defined u sufficient space for UDMI's... My domain is axissymetric and I make: C_UDMI(c,t,0) = C_T_G(c,t)[0] for axial direction C_UDMI(c,t,1) = C_T_G(c,t)[1] for radial direction Is it correct?

 December 3, 2001, 12:24 Re: Temperature gradient #8 Avinash kadam Guest   Posts: n/a hi i need to know the temperature gradient in the domain, i am using the using the udf... but i didnt know how to display the same, please do suggest me

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