Developing turbulent flow and heat transfer in a rotating rectangular duct
The effects of rotation on the developing turbulent flow and heat transfer in uniformly heated rectangular duct of 2:1 aspect ratio were investigated theoretically and experimentally with the emphasis on the theoretical part. Finite difference solutions for developing turbulent flow and heat transfer in stationary and axially rotating rectangular ducts were obtained. The computations employed the isotropic k-epsilon model and algebraic stress model of turbulence and a marching technique to integrate the governing equations. Numerical computations were performed first for the nonrotating case, for the square and rectangular geometry. Both turbulence models produced results in general agreement with the experimental correlations. Numerical results obtained for the rotating case indicate that the rotation increases the heat transfer and pressure drop. There is a minimum value of Grashof number, called here, the critical Grafhof number G/sub c/, below which the rotational effects are insignificant. The critical Grashof number increases with Reynolds number and is larger in the entrance region than for the fully developed flow.
- Research Organization:
- Lehigh Univ., Bethlehem, PA (USA)
- OSTI ID:
- 5512052
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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