Hello together,<\/p>\n
I’m trying to wrap my head around how to define the fluid flow conditions for my specific simulation case.
I want to simulate a high temperature flow of a gas through a cylindrical furnace. The pressure inside the furnace is in the range of 10 – 500 mbar, i.e. below atmospheric pressure. The inflow is defined by a steady massflow.
Now, to set the pressure in the simulation, should I simply set the pressure at the outflow according to the pressure in the furnace? (e.g. if I wanted to have a furnace pressure of 100 mbar I set the outflow pressure to 10 000 Pa?)
Or is the pressure at the outflow to be considered as an overpressure compared to the inflow? But how can I set underpressure if that is the case? <\/p>\n
If I run a simulation at different pressures and monitor the max gas velocity, the velocity increases with higher furnace pressures. This doesn’t make sense. At 0 Pa outflow conditions the gas flow is the slowest, but if 0 Pa would mean vacuum, the gas flow should be the fastest. <\/p>\n
Can somebody clarify this for me?<\/p>\n
Regarding this topic I have another question:
Does Discovery take the set underpressure into account to calculate the effective volume of the gas in the simulation? The same question applies to the temperature. <\/p>\n
I’m trying to simulate gas temperatures in the range of 800 – 2000 °C at pressures of 10 – 500 mbar, but I’m not quite sure if Discovery really takes these parameters into account. <\/p>\n
I would be very grateful for any insights. <\/p>\n
Thanks,<\/p>\n
Yves<\/p>\n","protected":false},"template":"","class_list":["post-355841","topic","type-topic","status-closed","hentry","topic-tag-ansys-discovery","topic-tag-cfd","topic-tag-cfd-analysis","topic-tag-gas","topic-tag-vacuum-2"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t