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udf with spacial and time variables

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Old   March 17, 2005, 08:10
Default udf with spacial and time variables
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hongxiao
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Hello,everyone,I want to know if "udf" can define the spacial variable and time variable simutaneously. Actually, I want to impose a velocity profile on the inlet which varies with space and time. In my udf file, I use both "F_CENTROID(x,f,thread);y=x[1], z=x[2]" and "real t=RP_Get_Real("flow-time"); --- line29" in the loop; But when I try to interpret the *.c, some errors arise, such as "line 29: parse error.""t, undeclared variable".

Thanks for your attention.
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Old   March 17, 2005, 08:19
Default Re: udf with spacial and time variables
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hongxiao
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Do you give me any suggestion to realize it? Thanks alot!
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Old   March 17, 2005, 08:50
Default Re: udf with spacial and time variables
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Dirk
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You should declare the variable t outside the DEFINE_PROFILE function. I had the same problem and it works this way (but I don't know why).

Dirk
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Old   March 17, 2005, 09:00
Default Re: udf with spacial and time variables
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hongxiao
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Dirk, thank you very much. you mean I declare the variable "t" in the same way as it in the DEFINE_PROFILE, or just declare it as "real t". I'll try it now, ^_^
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Old   March 17, 2005, 09:39
Default Re: udf with spacial and time variables
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Y
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first define it spatially and then do it in time
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Old   March 17, 2005, 11:26
Default Re: udf with spacial and time variables
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hongxiao
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@_@, it does not work now. Maybe I have misunderstood the suggestion. Could you give some detail illustration? Thank you very much!
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Old   March 17, 2005, 23:46
Default Re: udf with spacial and time variables
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hongxiao
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hi, Dirk, compiling has been successful, thank you very much!
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