Unconfined Flow and Heat Transfer around a Square Cylinder at Low Reynolds and Hartmann Numbers

2013 ◽  
Vol 40 (1) ◽  
pp. 71-90 ◽  
Author(s):  
Dipankar Chatterjee ◽  
Kanchan Chatterjee
Keyword(s):  
Heat Transfer ◽  
Square Cylinder ◽  
Flow And Heat Transfer ◽  
Unconfined Flow ◽  
Low Reynolds

Wall-Confined Flow and Heat Transfer Around a Square Cylinder at Low Reynolds and Hartmann Numbers

2013 ◽  
Vol 43 (5) ◽  
pp. 459-475 ◽  
Author(s):  
Dipankar Chatterjee ◽  
Kanchan Chatterjee ◽  
Bittagopal Mondal ◽  
Nirmal Baran Hui
Keyword(s):  
Heat Transfer ◽  
Square Cylinder ◽  
Flow And Heat Transfer ◽  
Confined Flow ◽  
Low Reynolds

EFFECTS OF BLOCKAGE RATIO AND PRANDTL NUMBER ON STEADY FLOW AND HEAT TRANSFER AROUND AN INCLINED SQUARE CYLINDER

2015 ◽  
Vol 46 (6) ◽  
pp. 541-562 ◽  
Author(s):  
Jaber Aboueian-Jahromi ◽  
Alireza Hossein Nezhad ◽  
Amin Behzadmehr
Keyword(s):  
Heat Transfer ◽  
Prandtl Number ◽  
Steady Flow ◽  
Blockage Ratio ◽  
Square Cylinder ◽  
Flow And Heat Transfer

scholarly journals Numerical Analysis of Mixed Convective Heat Transfer from a Square Cylinder Utilizing Nanofluids with Multi-Phase Modelling Approach

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5485
Author(s):  
Rajendra S. Rajpoot ◽  
Shanmugam. Dhinakaran ◽  
Md. Mahbub Alam
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Convective Heat Transfer ◽  
Richardson Number ◽  
Base Fluid ◽  
Square Cylinder ◽  
Heat Transfer Characteristics ◽  
Flow And Heat Transfer ◽  
Multi Phase ◽  
Modelling Approach

The present study deals with the numerical simulation of mixed convective heat transfer from an unconfined heated square cylinder using nanofluids (Al2O3-water) for Reynolds number (Re) 10–150, Richardson number (Ri) 0–1, and nanoparticles volume fractions (φ) 0–5%. Two-phase modelling approach (i.e., Eulerian-mixture model) is adopted to analyze the flow and heat transfer characteristics of nanofluids. A square cylinder with a constant temperature higher than that of the ambient is exposed to a uniform flow. The governing equations are discretized and solved by using a finite volume method employing the SIMPLE algorithm for pressure–velocity coupling. The thermo-physical properties of nanofluids are calculated from the theoretical models using a single-phase approach. The flow and heat transfer characteristics of nanofluids are studied for considered parameters and compared with those of the base fluid. The temperature field and flow structure around the square cylinder are visualized and compared for single and multi-phase approaches. The thermal performance under thermal buoyancy conditions for both steady and unsteady flow regimes is presented. Minor variations in flow and thermal characteristics are observed between the two approaches for the range of nanoparticle volume fractions considered. Variation in φ affects CD when Reynolds number is varied from 10 to 50. Beyond Reynolds number 50, no significant change in CD is observed with change in φ. The local and mean Nusselt numbers increase with Reynolds number, Richardson number, and nanoparticle volume fraction. For instance, the mean Nusselt number of nanofluids at Re = 100, φ = 5%, and Ri = 1 is approximately 12.4% higher than that of the base fluid. Overall, the thermal enhancement ratio increases with φ and decreases with Re regardless of Ri variation.

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