Dear Sir/Madam
I have problem with implementation of an equation in the code. I have a relation as follow:
βπ₯=β(ππ’/ππ)+πΌπΉ on inlet
where u is obtained in the former step and is known and F is known also. to reach the descent direction I need to calculate βπ₯ on inlet. I donβt know how to implement it in the code. I will be grateful if help me.
Best regards
Hello,
In the documentation, Β§3.13, it reads
macro dn(u) (N.xdx(u)+N.ydy(u) )
which shows you how to calculate the gradient of u and the vector normal to a boundary (in 2 dimensions).
HTH
Denis
Dear Denis
Thanks very much. I already wrote the equation but my problem is that how I can say that it is for inlet boundary not the other domain. is any definition for that in the code?
Best regards