Effects of Relative Magnetic Field, Chemical Reaction, Heat Generation and Newtonian Heating on Convection Flow of Casson Fluid over a Moving Vertical Plate Embedded in a Porous Medium

被引:53
作者
Khan, Dolat [1 ]
Khan, Arshad [2 ]
Khan, Ilyas [3 ,4 ]
Ali, Farhad [1 ,5 ]
ul Karim, Faizan [1 ]
Tlili, I. [6 ]
机构
[1] City Univ Sci & Informat Technol, Dept Math, Peshawar 25000, Pakistan
[2] Univ Agr, Inst Business & Management Sci, Peshawar, Khyber Pakhtunk, Pakistan
[3] Majmaah Univ, Dept Math, Coll Sci Al Zulfi, Al Majmaah 11952, Saudi Arabia
[4] Ton Duc Thang Univ, Fac Math & Stat, Ho Chi Minh City, Vietnam
[5] Ton Duc Thang Univ, Computat Anal Res Grp, Ho Chi Minh City, Vietnam
[6] Natl Engn Sch Monastir, Energy & Thermal Syst Lab, St Ibn El Jazzar, Monastir 5019, Tunisia
关键词
NONLINEAR RADIATION; MHD FLOW; DIFFUSION;
D O I
10.1038/s41598-018-36243-0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The aim of this article is to study the combined effects of heat generation and chemical reaction on magnetohydrodynamic (MHD) natural convection flow over a moving plate embedded in a porous medium. Natural convection is caused due to buoyancy forced which has been induced because of temperature and concentration gradients. The general condition of velocity has been considered on the plate surface with Newtonian heating and constant wall concentration. The effect of thermal radiation is also considered in the energy equation. The main objective here is to study the relative behavior of the magnetic field. That is the magnetic field shows two types of relative behavior. More exactly, when the magnetic field is fixed relative to the fluid (MFFRF) and the magnetic field is fixed relative to the plate (MFFRP). The general exact solution of the problem is determined by the Laplace transform method. Particular solutions for two special cases namely the plate with variable vibration and the plate with sine and cosine oscillations are also determined. Moreover, the solutions when zeta -> infinity for both cases i.e. MFFRF and MFFRP are also obtained as special cases. The velocity profile is presented in the form of mechanical, thermal and concentration components. Velocity obtained for oscillating plate condition is written in terms of steady-state and transient parts. Exact solutions obtained in this paper are interpreted graphically using computational software Mathcad-15 to examine the effects of various pertinent parameters such as Casson fluid parameter, the permeability of porous medium, chemical reaction parameter, heat generation parameter, buoyancy force parameter, magnetic parameter, and radiation parameter. Results for Sherwood number, skin-friction, and Nusselt number are numerically computed and discussed.
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页数:18
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