Abstract
A long heated cylinder was placed near a cold wall under the incident of a Couette flow. The conventional fluid was chosen as water (H 2 O). The nanoparticle materials were selected as Al 2 O 3 and CuO. The governing Navier-Stokes and energy equations were solved numerically through a finite volume method on a staggered grid system using QUICK scheme for convective terms and SIMPLE algorithm. The dependencies of hydrodynamic and heat transfer characteristics of the cylinder on non-dimensional parameters governing the nanofluids (Particle concentrations (φ), diameter (d np ), and particle materials) and the fluid flow (Peclet number Pe and gap height ratio L) were explored here. The shifting of the front stagnation point due to the addition of nanoparticles in the base fluid was investigated. A comparison between the heat transfer enhancement (N uM ) of the cylinder and its drag coefficient’s (C D ) increment/reduction was made by presenting their ratio Nu M /CD. The least square method was applied to the numerical results to propose Nu M = Nu M (Pe) and Nu M = Nu M (L).
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Swati Sharma received her M.S. in Applied Mathematics from University of Delhi, Delhi, India in 2009. She is currently a Ph.D. candidate in Mathematics, BITS PILANI, Pilani Campus, Rajasthan, India. Her research area is computational fluid dynamics.
Dilip K. Maiti received his Ph.D. in Mathematics from IIT Kharagpur, India in 2005. He is currently an Associate Professor and Head of Applied Mathematics with Oceanology and Computer Programming, Vidyasagar University, India. His research interests include nanofluid heat transfer over cylinder/s under the incident of Couette-Poiseuille flow, heat and mass transfer in cavity, micro channel Flow.
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Sharma, S., Maiti, D.K., Alam, M.M. et al. Nanofluid (H 2 O-Al 2 O 3 /CuO) flow over a heated square cylinder near a wall under the incident of Couette flow. J Mech Sci Technol 32, 659–670 (2018). https://doi.org/10.1007/s12206-018-0113-5
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DOI: https://doi.org/10.1007/s12206-018-0113-5