axial flow around a cylinder -heat transfer model?

March 21, 2006, 05:27

Hi!

I am to model the axial flow around a cylinder (air, incompressible, steady, high turbulent flow). The cylinder is hot so there is a heat transfer to the fluid. Now I have some questions:

What is the best turbulence model? How to choose grid size ant type at the boundary layer? should I use a wall function???

I want to compare it to experimental values, but it is very hard to find any appropiate reference for AXIAL flow... any sugestion???

Thanks Ralf

March 21, 2006, 08:54

Have a look the recent two papers and refernce therein, you might get few things of your interest

[1]. Fetecau, C., Fetecau, C. (2005) On some axial Couette flows of non-Newtonian fluids, Zeitschrift fur Angewandte Mathematik und Physik 56 (6), pp. 1098-1106

[2] Wiberg, R., Lior, N. (2005) Heat transfer from a cylinder in axial turbulent flows, International Journal of Heat and Mass Transfer 48 (8), pp. 1505-1517

Best regards... Ramp

March 21, 2006, 05:27	axial flow around a cylinder -heat transfer model?	#1
Ralf Schmidt Guest Posts: n/a	Hi! I am to model the axial flow around a cylinder (air, incompressible, steady, high turbulent flow). The cylinder is hot so there is a heat transfer to the fluid. Now I have some questions: What is the best turbulence model? How to choose grid size ant type at the boundary layer? should I use a wall function??? I want to compare it to experimental values, but it is very hard to find any appropiate reference for AXIAL flow... any sugestion??? Thanks Ralf

March 21, 2006, 08:54	Re: axial flow around a cylinder -heat transfer mo	#2
ramp Guest Posts: n/a	Have a look the recent two papers and refernce therein, you might get few things of your interest [1]. Fetecau, C., Fetecau, C. (2005) On some axial Couette flows of non-Newtonian fluids, Zeitschrift fur Angewandte Mathematik und Physik 56 (6), pp. 1098-1106 [2] Wiberg, R., Lior, N. (2005) Heat transfer from a cylinder in axial turbulent flows, International Journal of Heat and Mass Transfer 48 (8), pp. 1505-1517 Best regards... Ramp

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