MHD stagnation point flow of a micropolar fluid towards a moving surface with radiation

Mahmoud, Mostafa A. A.; Waheed, Shimaa E.

doi:10.1007/s11012-011-9498-x

Cited by 17 publications

(10 citation statements)

References 38 publications

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“…Seventeen different sets of values of the material parameter between [90,100], buoyancy parameter between [60, 100], and thermal radiation parameter between (Mahmoud and Waheed, 2012;Abbas et al, 2020a) were computed using regression analysis. In Eq.…”

Section: Regression Analysismentioning

confidence: 99%

“…Micropolar fluid equations differ from Navier-Stokes equations due to the non-symmetry of the stress tensor and couple stress. Since then, a variety of investigations have been conducted based on micropolar fluids of animal blood, polymeric fluids, oils, paints, and ferrofluids (Ishak, 2010;Kumar and Gupta, 2012;Mahmoud and Waheed, 2012;Postelnicu, 2012;Cortell, 2013;Sajid et al, 2018;Abbas et al, 2020a;Rana et al, 2020;Shezad et al, 2020). Hashem Zadeh et al (2020) have linked the change in Peclet number and bioconvection Lewis number directly to the coupled stress.…”

Section: Introductionmentioning

confidence: 99%

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An analytical approach to entropy production in MHD mixed convection micropolar fluid flow over an inclined porous stretching sheet

et al. 2022

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This analytical analysis examines the MHD micropolar fluid flow and mixed convection features using entropy production analysis of an inclined porous stretching sheet. Flow field and heat transfer analysis are presented to consider thermal radiation, heat source/sink, Lorentz, and buoyancy forces. The PDEs system is transformed by appropriate similarity variables, turned into a system of high non-linearity coupling ODEs, and then solved with the help of an analytical approach. An analytical approach can provide exact explicit solutions for the flow field, heat transport, entropy production, the local skin friction coefficient, the local couple stress coefficient, and the local Nusselt number. It is shown that the magnetic field, mixed convection, and sheet inclination effects can be incorporated together into a single parameter, which is called the magneto-buoyancy-inclination parameter here. In other words, this parameter controls the boundary layer flow. In addition, an experimental procedure called Box-Behnken design (BBD) was employed to analyze the influence of material (K), radiation (Rd), and buoyancy (Λ) parameters on entropy production in MHD micropolar fluid flow over the sheet. In order to estimate accurately the optimum entropy generation containing K, Rd, and Λ, we used a quadratic regression model. Based on the results of this investigation, the value of the entropy generation number became larger by decreasing the magneto-buoyancy-inclination parameter. Further, the magnitude of the local couple stress coefficient is reduced as the heat source parameter increases.

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Section: Regression Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An analytical approach to entropy production in MHD mixed convection micropolar fluid flow over an inclined porous stretching sheet

et al. 2022

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“…The radiation and melting effects on the MHD boundary layer flow over a moving surface have been inspected by Das (2014), while Mahmoud and Waheed (2012) examined the MHD stagnation point flow of a micropolar fluid toward a moving surface with radiation. Shateyi and Prakash (2014) proposed a new numerical approach for MHD laminar boundary layer flow and heat transfer of nanofluids over a moving surface in the presence of thermal radiation.…”

Section: Introductionmentioning

confidence: 99%

MHD flow and heat transfer of hybrid nanofluid over a permeable moving surface in the presence of thermal radiation

Zainal

Nazar

Naganthran

et al. 2020

HFF

121

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Purpose This paper aims to investigate the flow and heat transfer characteristics of a hybrid nanofluid (Cu-Al2O3/water) in the presence of magnetohydrodynamics and thermal radiation over a permeable moving surface. Design/methodology/approach By choosing appropriate similarity variables, the partial differential equations are transformed into a system of linear equations which are solved by using the boundary value problem solver (bvp4c) in MATLAB. The implementation of stability analysis verifies the achievable result of the first solution which is considered stable while the second solution is unstable. Findings The findings revealed that the presence of a magnetic field and suction slows down the fluid motion because of the synchronism of the magnetic and electric field occurred from the formation of the Lorentz force. Also, the enhancement of the thermal radiation parameter escalates the heat transfer rate of the current study. Originality/value The present study is addressing the problem of MHD flow and heat transfer analysis of a hybrid nanofluid towards a permeable moving surface, with the consideration of the thermal radiation effect. The authors show that in both cases of assisting and opposing flow, there exist dual solutions within a specific range of the moving parameters. A stability analysis approved that only one of the solutions are physically relevant.

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“…The steady laminar magnetohydrodynamic (MHD) boundary-layer flow past a wedge with constant surface heat flux immersed in an incompressible micropolar fluid in the presence of a variable magnetic field is investigated by Ishak et al [13]. Mahmoud and Waheed [14] examined an interaction between a MHD micropolar fluid and a moving surface with radiation. In the area of high temperature differences, Abd-El Aziz [15] studied the above effects on a moving semi-infinite plate with mixed convection flow of a micropolar fluid.…”

Section: Introductionmentioning

confidence: 99%

Influence of thermophoresis on MHD micropolar fluid over moved permeable plate

Allouaoui

Bouaziz

2017

mech

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MHD stagnation point flow of a micropolar fluid towards a moving surface with radiation

Cited by 17 publications

References 38 publications

An analytical approach to entropy production in MHD mixed convection micropolar fluid flow over an inclined porous stretching sheet

An analytical approach to entropy production in MHD mixed convection micropolar fluid flow over an inclined porous stretching sheet

MHD flow and heat transfer of hybrid nanofluid over a permeable moving surface in the presence of thermal radiation

Influence of thermophoresis on MHD micropolar fluid over moved permeable plate

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