期刊
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
卷 135, 期 10, 页码 -出版社
ASME
DOI: 10.1115/1.4024387
关键词
bioconvection; boundary layer; horizontal circular cylinder; porous medium
资金
- Ministry of Higher Education, Malaysia
- Universiti Kebangsaan Malaysia [DIP-2012-31]
In this paper, the steady mixed convection boundary layer flow past a horizontal circular cylinder with a constant surface temperature embedded in a porous medium saturated by a nanofluid containing both nanoparticles and gyrotactic micro-organisms in a stream flowing vertically upwards for both cases of a heated and cooled cylinder is numerically studied. The resulting system of nonlinear partial differential equations is solved numerically using an implicit finite-difference scheme. By considering the governing parameters, namely, the mixed convection parameter lambda, the bioconvection Lewis number Lb, the traditional Lewis number Le, the bioconvection Peclet number Pb, the buoyancy ratio Nr, the bioconvection Rayleigh number Rb, the Brownian motion Nb, and the thermophoresis Nt, the numerical results are obtained and discussed for the skin friction coefficient, the local Nusselt number, the local Sherwood number, the local density number of the motile micro-organisms as well as the velocity, temperature, nanoparticle volume fraction, and density motile micro-organisms profiles.
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