Analysis of radiative mixed convective heat transfer for non-Newtonian fluid with heat generation/absorption phenomena

被引:1
作者
Iftikhar, Babar [1 ,2 ]
Javed, Tariq [1 ]
Siddiqui, Muhammad Arshad [1 ]
机构
[1] IIUI, FOS, Dept Math & Stat, Islamabad, Pakistan
[2] IIUI, FOS, Dept Math & Stat, Islamabad 44000, Pakistan
关键词
Bi-viscosity; mixed convection; heat generation/absorption; thermal radiation; C-shaped cavity flows; finite-element method; THERMAL-RADIATION; SQUARE CAVITY; MASS-TRANSFER; FLOW; DRIVEN; BUOYANCY;
D O I
10.1177/09544089241237020
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The current work consists of investigating the heat generation/absorption and non-linear thermal radiation effects for two-dimensional mixed convective bi-viscosity fluid flow inside the C-shaped enclosure with uniformly heated left and linearly heated top and bottom walls. The physical flow problem is governed by applying the constitutive laws of bi-viscosity model, conservation of mass, momentum and energy balance equations. The governing non-linear coupled partial differential equations is transformed into the algebraic nonlinear system by using Galerkin's finite-element technique after eradicating the pressure terms via the penalty method, and then the Newton-Raphson technique is used to solve it. It is noted that at a low value of beta (which gives the high plasticity of the bi-viscosity liquid), only the primary circulations with intensity psi m a x = - 0.063 appeared, but at a high value of beta decreased the plasticity which caused enhanced buoyancy-driven that generate also the secondary bowls with intensity psi m a x = 0.063 inside the enclosure. The heat transfer rate increased 91.6667 % by an increase in the Reynolds number from 1 to 10 2 . The findings of this study will play a role in improving the thermal performance of microelectronic devices, cooling systems, food processing, solar collectors, and high performance boilers by tracing the energy transport trajectories through heatlines.
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页数:11
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