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Temperature derivative expression Tx or d(T,x) ?
Posted 08.03.2016, 17:29 GMT-5 Computational Fluid Dynamics (CFD), Parameters, Variables, & Functions 1 Reply
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Hi,
I am using laminar flow module and need to add a weak contribution for marangoni effect. The results of using Tx and d(T,x) are quite different, even their orders of fluid speed are different. I know that in the gallery's marangoni flow example the weak expression is test(u)*(gamma*Tx), but when I changed the expression to test(u)*(gamma*d(T,x)), the result also changes...
I am wondering are there any differences between this two expressions for temperature derivative: Tx and d(T,x) ?
Regards,
Jingyuan
I am using laminar flow module and need to add a weak contribution for marangoni effect. The results of using Tx and d(T,x) are quite different, even their orders of fluid speed are different. I know that in the gallery's marangoni flow example the weak expression is test(u)*(gamma*Tx), but when I changed the expression to test(u)*(gamma*d(T,x)), the result also changes...
I am wondering are there any differences between this two expressions for temperature derivative: Tx and d(T,x) ?
Regards,
Jingyuan
1 Reply Last Post 28.03.2016, 23:31 GMT-4
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Posted:
9 years ago
It turns out that Tx is the right expression here, in order to get the right order result. But I couldn't see anything improper with d(T,x)... Anyone knows?