fvm::Sp (A , B)
 

hi foamer

could u please tell me whats the functionality of fvm::Sp (A,B) ?

whats the difference between fvm::Sp (A,B) and A*B ?


thanks in advance

fvm::Sp(A, B) is used for an implicit source term, so "B" is the variable you are solving for. Using A*B will leave the term on the right hand side of the equations. Depending on the sign of your source term implicit treatment can help with stability.