modeling gas expansion -- CFD Online Discussion Forums

June 19, 2010, 02:04	modeling gas expansion	#1
queequeg New Member Join Date: Jun 2010 Posts: 1 Rep Power: 0	hi, this is the first time I use FLUENT because I need to simulate a gas jet coming out of a very small nozzle into vacuum. e.g. the density profile or pressure distribution (not the flow inside the nozzle). Assuming I know the mass flow rate at the nozzle tip. It seems to be a not so tricky problem but I just can't make the correct boundary conditions or models to get convergence or physical results. Can anyone please help and give me some suggestions? I'll be very appreciative.

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