constants in K-e turbulence model

Hu

Hi, all

I am new to PHOENICS. The version of PHOENICS I'm using is 3.2 on Windows NT platform. I got a few questions here. I tried to find out the entries where I can modify the constants such as C1e, C2e, Cmu in the main menu of the VR editor but I cannot get it. Could anyone tell me how to do that via VR editor, or I must do it manually in Q1 file?

The other question is that I wanted to simulate the ground roughness in the domain. What I did was I specified a global roughness, say 0.01m in the Sources page of the main menu, and using Fully-Rough option. Then I put a Plate on the bottom of the domain as the ground. I was wondering if the global roughness parameter would affect the auto wall function employed by Earth. Because I also put some cubic objects simulating the buildings and the material was 198 with smooth wall friction. I mean if the Earth will use the Fully-Rough wall function to calculate the flows near the cubic objects, instead of using default log-law wall function?

Please tell me how to or show me where I can get more information. Thank you for your time.

Hu