Hi everybody,

I am new using CFX and i need a simple CEL Expression to control the pressure in a autoclave. I have a Pressure sensor in the middle of the clave and i need to control the mass flow inlet to control this pressure.

How can I write a CEL Expression that open / close the inlet boundary of air to maintain the pressure?

thanks im advance,

Hello Lets say that youre mass flow value is mf and youre pressure level is Pmax you have to write these expression in CEL: mf*step((P-Pmax)/1[Pa]) thes expression will equal to mf if P<Pmax and 0 if P>=Pmax

Thank you!; I was jus reading about the step function on CFX-Help