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Size of computational domain for simulation of a mask

Question asked by Erik Liermann on May 10, 2016
Latest reply on May 11, 2016 by Siavash Khajehhasani

Dear all,

 

I am trying to run a flow simulation to determine the flow rate of air I need to have to deliver enough filtered air to the user of a mask. Unfortunately I have now idea how to realistically set the computational domain as small changes already result in completely different values.

To explain the system: An airflow (inlet volume flow) streams into the mask and protects the user from inhaling outside air. The outside air has a wind speed of 12 m/sec. I set surface goals to get the volume fraction of outside air at mouth and nose. After determining the flow rate I want to make another time dependent study including the human breath.

 

Do you have any idea how to size the computational domain for this scenario? information.PNG

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