Indoor airflow simulation

Project Support
1

[Looking for Help] I’ve created this project aims at visualizing the airflow within the volume but unfortunately encountered some discrepancies between my calculation and the sim results.

Indoor airflow simulation - Open-plan office

Target air introduce into the room is about 3.795m3/s, As I’ve set the velocity inlet (a total of 54 nos. of faces sized 1200600mm) at given value and pressure outlet (a total of 19 nos. of faces sized 20001000mm) at 0Pa as the boundary conditions and other settings keep at default, the velocity magnitude is far greater than what I expected (1x m/s from sim results vs ~0.1m/s as calculated).

Is there anything wrong that for my calculation / sim setting?

2

Hi,

From the current setup, you are assigning 2733 m3/h of volumetric flow rate to each one of 54 inlet faces.

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Each inlet face has a surface area of 0.72 m2.

So V = Q/A = (2733/3600)/0.72 = 1.05 m/s

You’re getting exactly that velocity at the results at the moment, so it looks correct to me. From your description, there’s something wrong with the flow rate that you defined.

Cheers