Rayleigh Benard convection in a bottom heated square cavity

arackal.rahul · June 28, 2015, 22:11

Hai every one,
Iam currently doing a CFD problem of Rayleigh Benard convection in a bottom heated square cavity. I have created several fine meshes in gambit. But I didn,t get small stream wise vortices at left top side and bottom right side. Could you please help me

sst · June 29, 2015, 15:25

It's a instability problem. So the final pattern of the simulation depends on many factors, geometry, temperature, initial conditions.... Please keep in mind that transient can give you different results than steady state. Just my experience, not sure it will help your case.

JulianP · June 30, 2015, 08:14

Indeed, it strongly depends on your geometry.
For further in-depth detail you might want to have a look at Bénard Cells and Taylor Vortices by E. L. Koschmieder (Cambridge Press).

June 28, 2015, 22:11	Rayleigh Benard convection in a bottom heated square cavity	#1
arackal.rahul New Member RAHUL S ARACKAL Join Date: Jun 2015 Posts: 1 Rep Power: 0	Hai every one, Iam currently doing a CFD problem of Rayleigh Benard convection in a bottom heated square cavity. I have created several fine meshes in gambit. But I didn,t get small stream wise vortices at left top side and bottom right side. Could you please help me

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June 29, 2015, 15:25		#2
sst New Member Simon Join Date: Jun 2015 Posts: 1 Rep Power: 0	It's a instability problem. So the final pattern of the simulation depends on many factors, geometry, temperature, initial conditions.... Please keep in mind that transient can give you different results than steady state. Just my experience, not sure it will help your case.

June 30, 2015, 08:14		#3
JulianP New Member Join Date: Sep 2012 Posts: 11 Rep Power: 13	Indeed, it strongly depends on your geometry. For further in-depth detail you might want to have a look at Bénard Cells and Taylor Vortices by E. L. Koschmieder (Cambridge Press).