[khalifa]

Hello friends,

my question is in regard to the first solved example in openFoam user guide, Cavity. why we assume that the pressure boundary condition at all walls is zero gradient ?. I mean how can we conclude to this condition from the NS equation.

thanks.

[msuaeronautics]

Originally Posted by khalifa

Hello friends,

my question is in regard to the first solved example in openFoam user guide, Cavity. why we assume that the pressure boundary condition at all walls is zero gradient ?. I mean how can we conclude to this condition from the NS equation.

thanks.

Please view this explanation from another user on the forum:

http://www.cfd-online.com/Forums/ope...tml#post270486