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Showing results 1 to 6 of 6 Search took 0.00 seconds. Search: Posts Made By: doug

Forum: Main CFD Forum October 21, 2009, 10:57

Replies: 13 Writing Turbulence Solver, k-e model Views: 3,663 Posted By doug Sammy, The "boundary condition" for epsilon... Sammy, The "boundary condition" for epsilon at a wall is simply the second derivative of k at the wall (y+=0). So, depending on how your grid is set up and how you have discretized the domain, you...

Forum: Main CFD Forum October 21, 2009, 10:53

Replies: 13 Writing Turbulence Solver, k-e model Views: 3,663 Posted By doug Mazdak, Are you using wall functions or... Mazdak, Are you using wall functions or wall-damping functions? I've only ever written code that will solve the k-e model with wall-damping functions. To get a converged solution with wall-damping...

Forum: Main CFD Forum April 13, 2009, 11:14

Replies: 13 Writing Turbulence Solver, k-e model Views: 3,663 Posted By doug Thanks for your help! I'm looking at this more... Thanks for your help! I'm looking at this more closely and will post my results when I get a little further. In the meantime, does anyone know what Fluent uses very near the wall in this...

Forum: Main CFD Forum April 7, 2009, 20:20

Replies: 13 Writing Turbulence Solver, k-e model Views: 3,663 Posted By doug After looking through Wilcox, it looks like if my... After looking through Wilcox, it looks like if my cell is within a certain y+ distance from the wall, I'll have to use asymptotic values for a few of the equations. Is this right? I guess I'm...

Forum: Main CFD Forum April 7, 2009, 16:03

Replies: 13 Writing Turbulence Solver, k-e model Views: 3,663 Posted By doug I'm using a first-order upwinding scheme for the... I'm using a first-order upwinding scheme for the convection terms. I'm actually using deferred correction so I can blend between first-order upwinding and central differencing, but right now I'm...

Forum: Main CFD Forum April 6, 2009, 12:11

Replies: 13 Writing Turbulence Solver, k-e model Views: 3,663 Posted By doug Writing Turbulence Solver, k-e model All, I'm writing my own turbulence solver. I've decided to start with the k-e model using the Lam and Bremhorst damping functions as I think this is one of the simplest models. I'm using...

Showing results 1 to 6 of 6

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