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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.244 SNIP: 0.434 CiteScore™: 0.7

ISSN Print: 1940-2503
ISSN Online: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2017021128
pages 121-149

EFFECTS OF AIDING BUOYANCY AND CHANNEL CONFINEMENT ON THE FLOW AND HEAT TRANSFER OF DILATANT FLUIDS FROM A SQUARE OBSTACLE

Deepak Kumar
Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Amit Kumar Dhiman
Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee - 247 667, India

ABSTRACT

Aiding buoyancy flow and heat transfer phenomena of the dilatant (shear-thickening) fluids are examined for a square obstacle fixed in a vertical channel of confinement (β) = 25–50%. The computer simulations are performed at various Reynolds number (Re = 1–40), Prandtl number (Pr = 1–50), Richardson number (Ri = 0–2) and power-law index (n = 1–1.8). The output parameters and the illustrative isotherm and streamline patterns are obtained to clarify the function of various input parameters in the current framework. The maximum growth in heat transfer is ∼ 993% for Pr = 50 (at Re = 1, n = 1, Ri = 2, β = 50%) with the corresponding values at Pr = 1 (Re = 1, n = 1, Ri = 2, β = 50%). Total drag coefficient and the Colburn heat transfer factor correlations have been achieved, in the end.