|
[Sponsors] |
March 5, 2010, 03:15 |
Friction Velocity
|
#1 |
New Member
Pooven
Join Date: Nov 2009
Location: Durban, South Africa
Posts: 9
Rep Power: 17 |
Hi there,
I don't have a CFD background so I'm not sure if what I've done is correct; I was hoping for some clarity... I want to define a drag force at the floor of my simulation. I do this in the /0/U file: In the boundaryField sub-dictionary, in the floor wall sub-dictionary I calculate the drag force using by using u_* = k u_k/ln(h/z_0).I think that the drag force in this case is the friction velocity? I have to represent the friction velocity as a vector so I convert it using sin(x) * u_* and cos(x) * u_* where x is in the opposite direction of the flow (though I don't think it makes a difference?) and the z component of the vector is set to 0. Am I totally off? Kind regards Pooven |
|
Tags |
drag force, friction velocity |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Velocity in Porous medium : HELP! HELP! HELP! | Kali Sanjay | Phoenics | 0 | November 6, 2006 07:10 |
Variables Definition in CFX Solver 5.6 | R P | CFX | 2 | October 26, 2004 03:13 |
Simple question for friction velocity | jay | Main CFD Forum | 0 | February 12, 2004 17:12 |
friction velocity | kei-tee | Main CFD Forum | 10 | May 25, 2003 20:31 |
Terrible Mistake In Fluid Dynamics History | Abhi | Main CFD Forum | 12 | July 8, 2002 10:11 |