Modeling Jet Fans in Parking Ventilation in Ansys CFX

AI Thread Summary
The discussion revolves around modeling jet fans for a parking ventilation system using Ansys CFX. The user has set up a fresh air inlet and exhaust outlet, and modeled jet fans as subdomains with momentum sources based on thrust calculations. They are also simulating a fire scenario with smoke using a flow inlet boundary condition. However, they are experiencing unrealistic results and seek feedback on their methodology and specific challenges related to numerically modeling the jet fans and smoke. The conversation highlights the importance of accurate modeling techniques and the need for detailed technical information from jet fan manufacturers.
tj00343
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Hi , I'm new to CFD. I'm modeling a parking ventilation system in ansys CFX. I'm having some trouble modeling the jet fans . I went as follows. I created a fresh air inlet (Opening BC), an exhuast outlet (outlet BC) and in the middle I distributed jet fans .The jet fans are modeled as sub domains with momentum sources(momentum calculated from the thrust). In addition, I simulated a fire through flow inlet BC at a surface with and additional variable(smoke). I ran a transient analysis. The problem is the results seem unreal.
Generally, how does my methodology look. Am I on the right track. Any tips or ideas about why my results seem unreal.
Thank You
 
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I've just looked at some jet fan manufacturers websites . In each case they give comprehensive technical information about their products .

The information provided seems to tell you everything you need to know .

Please describe what specific difficulties you have .
 
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My specific difficulties have to do with how to numerically model the jet fans and smoke in ansys cfx
 

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