Hi Please how to impose combustion pressure in fluent? is it the operating pressure ? or should I impose it in the inlet boundary conditions ??

thanks for the help

If you say that it is "high pressure combustion" then your operating pressure should be high. An inlet pressure generally is more relevant as a driving pressure (say compressor-line loss if you know). Which one of the two do you have depending upon that your input boxes will change!

Swarup.

Hi Swarup

I am simulating H2/O2 combustion under 10 bars combustion pressure.

1- when using presumed pdf, should I use 10 bars=10^6 Pa in the operating pressure for prepdf ?, or Should I use the 10 bars under fluent ? or simply, calculate the velocity injection of H2 and O2 ( according to 10 bars) and use velocity inlet BC, and keep 101000 in the operating pressure of fluent ?

Thanks for the help.