3D Annulus Cylinders

Heat Pipe · October 18, 2014, 00:27

Hi all of you

I'm working on concentric and eccentric annulus using nanofluids.

My issue is with laminar flow (Re = 100-1500) and specify the gravity the solution did not converge. without applying the gravity had good convergence and the heat transfer coefficient as follows

h = 28 without gravity
h = 30 with gravity

How to deal with this issue as I have to study the buoyancy force???

Kokemoor · October 20, 2014, 10:37

You might have some luck with different Pressure-Velocity coupling or pressure discretizations, particularly Body-Force-Weighted.

October 18, 2014, 00:27	3D Annulus Cylinders	#1
Heat Pipe Member CR-7 Join Date: Jun 2011 Location: Malaysia Posts: 66 Rep Power: 14	Hi all of you I'm working on concentric and eccentric annulus using nanofluids. My issue is with laminar flow (Re = 100-1500) and specify the gravity the solution did not converge. without applying the gravity had good convergence and the heat transfer coefficient as follows h = 28 without gravity h = 30 with gravity How to deal with this issue as I have to study the buoyancy force???

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October 20, 2014, 10:37		#2
Kokemoor Senior Member Andrew Kokemoor Join Date: Aug 2013 Posts: 122 Rep Power: 13	You might have some luck with different Pressure-Velocity coupling or pressure discretizations, particularly Body-Force-Weighted.