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Air change rate

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Old   October 6, 2021, 08:41
Question Air change rate
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Hello

I am performing a steady-state simulation of a naturally ventilated building using Fluent. The building has multiple windows and rooms, and the ventilation depends on the outdoor condition. What is the method to extract the Air Change Rate in the rooms?
Some online resource have instead spoken about air change effectiveness using a UDF, which is different from what I intent to study.

Any help will be appreciated.

Thank you
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