Zero streamwise gradient at outlet
How do we specify the Neumann boundary conditions or Zero streamwise gradient at the outlet in a pipe in CFX-pre. There are options only for Static Pressure, Avg. Static Pressure, Velocity components, Mass flow rate and Normal speed.
I need to specify derivative of all the variables to zero, I couldn't find clear help from ANSYS.
I am wondering whether I need to specify any additional variable? If so, how is that done.
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