Turbulent flow and heat transfer in pipes with buoyancy effects

Author:

Abdelmeguid A. M.,Spalding D. B.

Abstract

A finite-difference procedure, is employed to predict the turbulent flow and heat transfer in horizontal, inclined and vertical pipes when influenced by buoyancy. The flow is treated as parabolic; and the turbulence model used involves the solution of two differential equations, one for the kinetic energy of turbulence and the other for its dissipation rate. Results are presented for the velocity and temperature fields, and the associated flow-resistance and heat-transfer coefficients. The predictions for horizontal and vertical pipes have been compared with the available experimental results, and the agreement obtained is good.

Publisher

Cambridge University Press (CUP)

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics

Reference11 articles.

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2. Carr, A. D. , Connor, M. A. & Buhr, H. O. 1973 Velocity, temperature and turbulence measurements in air for pipe flow with combined free and forced convection.Trans. A.S.M.E., J. Heat Transfer 95,445.

3. Launder, B. E. & Spalding, D. B. 1974 The numerical computation of turbulent flows.Comp. Meth. for App. Mech. & Engng 3.

4. Polyakov, A. F. 1974 Development of secondary free-convection currents in forced turbulent flow in horizontal tubes.J. Appl. Mech. Tech. Phys., PMTF,5.

5. Petukhov, B. S. 1976 Turbulent flow and heat transfer in pipes under considerable effect of thermogravitation forces. (Report presented at seminar on Heat Transfer at Turbulent Free Convection.) Int. Centre Heat & Mass Transfer, Dubrovnik.

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