Heat transfer in flows of non-Newtonian Bingham fluids through axisymmetric sudden expansions and contractions
- Polytechnic Univ., Brooklyn, NY (United States). Dept. of Mechanical Engineering
The heat transfer phenomenon associated with the laminar, constant properties flow of non-Newtonian Bingham fluids over sudden expansions and through contractions in circular pipes are studied by numerically solving the fully elliptic governing continuity, momentum, and energy equations for a wide rang of the governing Reynolds, yield, and Prandtl numbers. The influence of the yield number on the thermal field is more pronounced at high Reynolds and Prandtl numbers. In the sudden expansion case this influence takes the form of a localized peak in the Nusselt number distribution downstream of the reattachment point. The magnitude of the peak Nusselt number increases with the Reynolds, yield, and Prandtl numbers. A sharp reduction in the Nusselt number values right before the contraction plane is found to be more significant at high Reynolds and Prandtl numbers.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 128780
- Journal Information:
- Numerical Heat Transfer. Part A, Applications, Journal Name: Numerical Heat Transfer. Part A, Applications Journal Issue: 3 Vol. 28; ISSN NHAAES; ISSN 1040-7782
- Country of Publication:
- United States
- Language:
- English
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