Mixed convection in wall plume of power-law fluids

1994 ◽  
Vol 102 (1-4) ◽  
pp. 47-58 ◽  
Author(s):  
J. K. Lee ◽  
R. S. R. Gorla ◽  
S. Nakamura ◽  
I. Pop
Keyword(s):  
Mixed Convection ◽  
Power Law ◽  
Power Law Fluids ◽  
Wall Plume

Mixed convection from a heated sphere in power-law fluids

2013 ◽  
Vol 89 ◽  
pp. 49-71 ◽  
Author(s):  
N. Nirmalkar ◽  
R.P. Chhabra
Keyword(s):  
Mixed Convection ◽  
Power Law ◽  
Power Law Fluids

Stratified Shear-Thinning Fluid Flow Past Tandem Cylinders in the Presence of Mixed Convection Heat Transfer with a Channel-Confined Configuration

2021 ◽  
Author(s):  
Ajay Raj Dwivedi ◽  
Amit Dhiman ◽  
Aniruddha Sanyal
Keyword(s):  
Heat Transfer ◽  
Mixed Convection ◽  
Power Law ◽  
Shear Thinning ◽  
Thermal Parameters ◽  
Maximum Heat ◽  
Critical Spacing ◽  
Maximum Heat Transfer ◽  
Gap Ratio ◽  
Power Law Fluids

Abstract The article examines the consequence of thermal buoyancy-driven cross-flow and heat transfer for shear-thinning power-law fluids on the tandem orientation of two cylinders. Finite volume methodology is used to investigate the effect of the gap ratio (2.5 ≤ S/D ≤ 5.5), power-law index (0.2 ≤ n ≤ 1) and Richardson number (0 ≤ Ri ≤ 1) on flow and thermal output parameters at Reynolds number Re ≤ 100 and Prandtl number Pr ≤ 50 in a confined channel. An unprecedented jump has been witnessed in the flow/thermal parameters at the critical gap ratio (critical spacing). At forced convection (Ri ≤ 0), this critical spacing keeps on increasing with shear-thinning character, from S/D = 3.9 (at n = 1) to 4.9 (at n = 0.2). On the contrary, an increase in shear-thinning characteristic leads to a decrease in critical spacing from S/D = 3.9 (at n = 1) to 2.8 (at n = 0.4) for Ri = 1 (mixed convection). The heat transfer rate increases with shear-thinning behavior, with a maximum heat transfer, noted at n = 0.2. A higher unprecedented increment for flow/thermal parameters is seen at critical spacing for the downstream cylinder than the upstream cylinder. At the highest gap ratio, the output parameters for the upstream cylinder approximate that of an isolated cylinder. The time-variant fluctuations in lift coefficients for a shear-thinning flow in a tandem arrangement provide a new understanding of co-shedding and extended body flow regimes.

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