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Temperature gradient: Does the C_T_G macro work ?

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Old   May 23, 2011, 16:59
Default Temperature gradient: Does the C_T_G macro work ?
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Hi CFD mates,

I want to compute the temperature gradient in different solid zones of the domain. I found that the macro C_T_G can perform this task but I did not manage to get it working. Fluent always gives the same error: "Segmentation Violation"

Why ? How to solve this issue ?

I have looked here and there on the internet and I found many people who have the same problem, but I couldnt find any solution. Is it possible that there is a problem with the macro C_T_G itselft ?

Here is my code (which is basically the same as in the UDF guide of Fluent):

Domain *d;
cell_t c;
Thread *t;
d = Get_Domain(1);


C_UDMI(c,t,1) = NV_MAG(C_T_G(c,t));



Thanks mates !
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Old   December 21, 2011, 05:55
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Hi tumbao,

Did you add header file mem.h in your udf?? and also did you run the text command solve/set/expert??

This will Keep temporary solver memory from being freed?.
Note that when you do this, all of the gradient data is retained, but the calculation requires more memory to run
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Old   July 6, 2016, 16:13
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Apiano Morais
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You need to allow the derivatives in order to store gradients.
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c_t_g, error, problem, segmentation violation, temperature gradient

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