|July 8, 2010, 18:45||
Flow past 2 smooth circular cylinder
Join Date: Jul 2010
Posts: 1Rep Power: 0
I am trying to simulate the flow past 2 smooth circular cylinder at Re=5.10^5. The diameter of the cylinder is 0.2 m.
I'm using the k-e turbulent model and a transient formulation.
For the specification method I put the turbulent length scale at 0.0225 and the turbulence intensity at 0.8 as recommended in a publication for the flow past one smooth cylinder. (length scale/D=0.0045)
Nevertheless when I look at the results for the Y-velocity, for the vorticity magnitude or the static pressure I don' t see any eddies. It looks like the flow just started to pass over the 2 cylinders. But I launched the simulation up to 200 seconds.
My time step is ok, my mesh is ok, my Y+ are comprised between 30 and 300.
For the solution method I put 2nd order for the momentum, turbulent kinetic energy and turbulent dissipation rate.
That's why I guess there was a problem in the input parameters. I'm going to launch some simulation with a turbulent length scale smaller and see whether it is the problem or not.
I precise that those parameters work with a single circular cylinder.
Could you please give me some advices to help me to understand my mistake ?
|Thread||Thread Starter||Forum||Replies||Last Post|
|Incorrect Drag and Drag Coefficient for flow over a cylinder||ozzythewise||Main CFD Forum||8||June 13, 2012 06:24|
|flow past a circular cylinder||Senthilkumar||Main CFD Forum||2||April 19, 2009 23:18|
|Tubulent flow past circular cylinder at Re=3900||Jinglei||Main CFD Forum||1||September 11, 2007 06:05|
|Modeling flow acros circular cylinder||Zhihua||Main CFD Forum||3||April 20, 2004 11:16|
|Simulation of the Flow past a circular cylinder using STAR-CD||M. S. GUEROUACHE||Main CFD Forum||0||October 1, 1998 10:51|