flow works in one of 2 ways
2 pressure conditions > output is the flow rate
1 pressure condition and one flow rate > output is the pressure at the flow rate end
you can't define both conditions at the same lide
pick the one based on the one that you have the most information about
my guess is that you should be using an inlet flow rate and outlet pressure opening at 101325
your output will tell you the velocity at the output and also the pressure at the inlet so you can calculate the pressure delta
this is as close as you are going to get in flow simulation since it does not solve free stream problems
Hi Jared Conway ,
related to your explanation about "flow works in 2 ways",
is this generally known?
i mean, i am looking for this kind of information in technical reference and googling it but can't find better reference as my based action.
do you mind to share the reference? maybe an article or any SOLIDWORKS Flow Simulation text explaining about this?
thanks for your kind help,
Okei, so this would then be a free stream problem.
Would it be an idea to set the inlet pressure to 7 bar, and adjust the outlet pressure until I had the desired flow?
Then I must find a way to measure the flow, though..
not sure what you mean by free stream
you could set the 7bar pressure and modify the outlet pressure until you get the flow you want
measure flow rate at the inlet/outlet using a goal
by free stream I ment flow into air.
After I introduced surface roughness in the model, the pressuredrop at the given flow corresponded very well with the measured values.
So i think it is quite good to set the pressure at the outlet of the valve at environmental pressure.