|
[Sponsors] |
January 9, 2012, 17:40 |
roughness patches for ABL flow
|
#1 |
New Member
Join Date: Jun 2009
Posts: 27
Rep Power: 16 |
I am trying to do ABL simulation with roughness patches (length, z0) using wall functions. For a suburban roughness of z0=0.42, the requirement that the first cell be larger than ks (~20z0 = 8.4m) results in cell height of about 17m. For urban patch it would be 34m. Can I trust the result I get using this cell size ? I want to know if this option is feasible at all before pursuing the other option of putting blocks to account for roughness. I have seen one paper by Wang (2007) that does a 2D simulation without using blocks (I think through specifying shear stress but I don't understand it).
thank you |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Compressible flow, no data at the outlet | mireis | FLUENT | 6 | September 3, 2015 02:10 |
Fully Developed Flow in Star-cd | SMM | STAR-CD | 0 | September 5, 2011 22:08 |
Flow meter Design | CD adapco Group Marketing | Siemens | 3 | June 21, 2011 08:33 |
Surface roughness in laminar flow | carno | FLUENT | 4 | August 19, 2007 15:52 |
transform navier-stokes eq. to euler-eq. | pxyz | Main CFD Forum | 37 | July 7, 2006 08:42 |