# meandering plume

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 April 21, 2005, 04:51 meandering plume #1 tomas Guest   Posts: n/a Hi all, I am simulating flows within a naturally ventilated building driven by thermal buoyancy. The plume emitted from the outlet of the building (roof apex) starts to meander during the solution process and this stalls convergence. If I force symmetry by placing a symettrical plane down the centre of the plume then the solution converges fine, but am I actually simulating real conditions by doing this? Could anyone give me some advice on this? thanks. and very much appreciated

 April 21, 2005, 08:56 Re: meandering plume #2 Jim_Park Guest   Posts: n/a The meander is often physical. Think of the wake behind a boat at certain speeds, or the vortices shed behind a truck (lorry, etc) in a certain speed range. Does the meander propogate itself back into the interior of the building? I don't think you're simulating a real condition with the symmetry plane. Try pushing the physical effect that's driving your flow (raise the temperatures in the building)to see if the meander disappears at higher velocities. Interesting problem - and complex. Good luck.

 April 21, 2005, 09:24 Re: meandering plume #3 Harry Fulmer Guest   Posts: n/a I think this is called 'looping'. It's a natural transient phenomena. Try solving transient, forcing steady state might be the cause of your problems.

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