Nanofluid (H 2 O-Al 2 O 3 /CuO) flow over a heated square cylinder near a wall under the incident of Couette flow
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).
KeywordsFVM Heat transfer enhancement Nanofluid Heated square cylinder Gap height
Unable to display preview. Download preview PDF.
- S. U. S Choi, Enhancing thermal conductivity of fluid with nanoparticles in development and applications of non-Newtonian flows, ASME, 231 (1995) 99–105.Google Scholar
- M. Sheikholeslami, M. Gorji-Bandpy and K. Vajravelu, Lattice Boltzmann simulation of magnetohydrodynamic natural convection heat transfer of Al2O3-water nanofluid in a horizontal cylindrical enclosure with an inner triangular cylinder, Int. J. Heat Mass Transf., 80 (2015) 16–25.CrossRefGoogle Scholar
- M. R. Salimpour and A. D. Parizi, Convective heat transfer of nanofluid flow through conduits with different crosssectional shapes, J. Mech. Sci. Eng., 29 (2) (2015) 707–713.Google Scholar
- M. Azimi and R. Riazi, MHD copper-water nanofluid flow and heat transfer through convergent-divergent channel, J. Mech. Sci. Eng., 30 (10) (2016) 4679–4686.Google Scholar