Buoyancy Driven Flow

sunilpatil · March 18, 2013, 12:39

Hello sir,
I am modelling natural convection heat transfer between two parallel plates
with Buoyancy using Ansys CFX. up to what value of residual can be acceptable
for Buoyancy Driven Flows(i.e. RMS values for Mass and Momentum,Heat Transfer,Turbulent KE)
Thank You sir

ghorrocks · March 19, 2013, 04:38

There is no general rule for this. You have to do a sensitivity study where you sweep a range of convergence tolerances and see what effect it has on parameters of interest to you. When you have converged the parameters of interst to you to a tolerance you are happy with then you have found the convergence tolerance you require.

March 18, 2013, 12:39	Buoyancy Driven Flow	#1
sunilpatil Senior Member sunil Join Date: Jul 2012 Location: Bangalore Posts: 179 Rep Power: 13	Hello sir, I am modelling natural convection heat transfer between two parallel plates with Buoyancy using Ansys CFX. up to what value of residual can be acceptable for Buoyancy Driven Flows(i.e. RMS values for Mass and Momentum,Heat Transfer,Turbulent KE) Thank You sir

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March 19, 2013, 04:38		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	There is no general rule for this. You have to do a sensitivity study where you sweep a range of convergence tolerances and see what effect it has on parameters of interest to you. When you have converged the parameters of interst to you to a tolerance you are happy with then you have found the convergence tolerance you require.