hello, I want to apply the normal gradient d(uds)/dx to be zero at outflow faces for the UDS. The two available options for UDS ( specified flux and value) are not matching that. I wrote a UDF using DEFINE_PROFILE but that is not accepted at outflow BC. How will Fluent calculate specified flux at the boundary and are there any options to set that zero. plz help me.. its urgent. thanks for considering my request bye ramesh

are u simualting mutliphase flows??? If yes then chocie of boundary condition is not appropriate? Why are u suing an outflow??? Podila