whats the usage of advective and convective BC,differences and formulas?
 

Hi All
I want to know
1)whats the usage of advective and convective BC's?in what types of flow?
in what types of outlet patches they have to and in which types can apply?and not in what types?

2)then whats their formulas?
3)whats their differences in formula and usages?
thanks for instructions.

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