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CVI/CVD constant pressure

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Old   June 20, 2016, 04:25
Unhappy CVI/CVD constant pressure
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Hello everybody,

im trying to model a reactive CVI/CVD flow. First i wanted to get the temperatur and velocity distributions inside the reactor. I have an Inlet for the carrier gas and an Inlet for my reaction gas. I want to mix them in the reaction chamber just like it is in the experimental construction. The inlet is velocity inlet. i wanted to do a pressure outlet because in the experimental construction there is a pump and a valve at the outlet of the chamber. They measure the pressure in the reaction chamber and control/regulate the valve (by open and close it) to keep the pressure constant. How can i keep the pressure constant in my simulation. What outlet condition can i use for this. Is it even possible? Do i need a UDF? Im also slightly confused about operating pressure and gauge pressure. Is the pressure they measure in the experiments my operating pressure?

Im looking forward for your input! Thank you!
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