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can i get pressure derivative in UDF?

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Old   April 8, 2011, 03:10
Default can i get pressure derivative in UDF?
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hi. now i need to get the pressure derivative \partial p/\partial x in UDF. is there any macros i could use like the velocity derivative macros(C_DUDX(c,t))? if not, how can i get the pressure derivative?
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Old   April 8, 2011, 03:46
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C_P_G(c,t) will give you the pressure gradient vector. dp/dx = C_P_G(c,t)[0]

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Old   April 8, 2011, 03:54
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thank you so much for replying. so you mean the pressure gradient equals pressure derivative here?
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Old   April 8, 2011, 04:10
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yes it is
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Old   April 8, 2011, 04:12
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ok, thank u and cheers!!! lol
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