Boundary Conditions in a gas stirred tank.

Antoniouh · January 20, 2016, 14:40

Hi everyone,
I am a beginner using Fluent. I am trying to simulate a gas stirred tank using Eulerian multiphase model. The case is about a tank full of water and the tank had a gas inlet in the center of the bottom of the tank. The Modelo is 2D. I am using the pressure-based solver. The tank is open to atmosphere, allowing the escape of injected gas. How can I set the atmospheric pressure (101325 Pa) in the top of the tank? What operating pressure condition should I establish?
The gas inlet is a velocity-inlet type of boundary and the value is 0.61 m/s. However, the condition needs a initial pressure gauge, What is the value that I have to set?

I hope you can help me and thank you for all your comments.

hwet · January 22, 2016, 01:07

if it is open to the atmosphere just leave them as 0. both for the inlet and the outlet. (i think)

January 20, 2016, 14:40	Boundary Conditions in a gas stirred tank.	#1
Antoniouh New Member Join Date: Jan 2016 Posts: 2 Rep Power: 0	Hi everyone, I am a beginner using Fluent. I am trying to simulate a gas stirred tank using Eulerian multiphase model. The case is about a tank full of water and the tank had a gas inlet in the center of the bottom of the tank. The Modelo is 2D. I am using the pressure-based solver. The tank is open to atmosphere, allowing the escape of injected gas. How can I set the atmospheric pressure (101325 Pa) in the top of the tank? What operating pressure condition should I establish? The gas inlet is a velocity-inlet type of boundary and the value is 0.61 m/s. However, the condition needs a initial pressure gauge, What is the value that I have to set? I hope you can help me and thank you for all your comments.

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January 22, 2016, 01:07		#2
hwet Senior Member Join Date: Mar 2014 Posts: 375 Rep Power: 13	if it is open to the atmosphere just leave them as 0. both for the inlet and the outlet. (i think)