[abing999]

Hi All,

I have some question about the numerical wind tunnel...The software I used is the Flotherm V10.1, and I want to use simulation to find out the system resistance curve of the PSU. While the system fan is working, I get the operating point of the system fan where is value is 16 CFM with 119 Pa. But when I failed the fan and try to use the numerical wind tunnel with fixed flow rate 16 CFM wind flow rate, the pressure drop front and back of the system is only 13 Pa...

The boundary I set are open of the flow direction and symmetry beside the flow direction. Initial setting is 30C air with 3D flow only.

Can anyone gives some suggestion about how to get the operating point where used the numerical wind tunnel ?
Or something wrong with my concept of operating point ?

Thank you for advanced.