Elastic deformation and inclined magnetic field on entropy generation for Walter’s liquid B fluid over a stretching sheet

This article investigates the combined influence of nonlinear radiation, Stefan blowing and chemical reactions on unsteady electro-magneto-hydrodynamic stagnation-point flow of a nanofluid from a horizontal stretching sheet. Both electrical and magnetic body forces are considered. In addition, the effects of velocity slip, thermal slip and mass slip are considered at the boundaries. An analytical method named as homotopy analysis method is applied to solve the non-dimensional system of nonlinear partial differential equations which are obtained by applying similarity transformations on governing equations. The effects of emerging parameters such as Stefan blowing parameter, electric parameter and magnetic parameter on the important physical quantities are presented graphically. In addition, an entropy generation analysis is provided in this article for thermal optimization. The flow is observed to be accelerated both with increasing magnetic field and electrical field. Entropy generation number is markedly enhanced with greater magnetic field, electrical field and Reynolds number, whereas it is reduced with increasing chemical reaction parameter.

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Effects of Inclined Magnetic Field and Chemical Reaction on Flow of a Casson Nanofluid with Second Order Velocity Slip and Thermal Slip Over an Exponentially Stretching Sheet

International Journal of Applied and Computational Mathematics ◽

10.1007/s40819-016-0273-5 ◽

2016 ◽

Vol 3 (4) ◽

pp. 2967-2985 ◽

Cited By ~ 3

Author(s):

Besthapu Prabhakar ◽

Shanker Bandari ◽

Ch. Kishore Kumar

Keyword(s):

Magnetic Field ◽

Chemical Reaction ◽

Stretching Sheet ◽

Velocity Slip ◽

Second Order ◽

Thermal Slip ◽

Inclined Magnetic Field ◽

Casson Nanofluid ◽

Exponentially Stretching Sheet ◽

Exponentially Stretching

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Effect of Inclined Magnetic Field on the Entropy Generation in an Annulus Filled with NEPCM Suspension

Mathematical Problems in Engineering ◽

10.1155/2021/8103300 ◽

2021 ◽

Vol 2021 ◽

pp. 1-14

Author(s):

Seyyed Masoud Seyyedi ◽

M. Hashemi-Tilehnoee ◽

M. Sharifpur

Keyword(s):

Magnetic Field ◽

Heat Transfer ◽

Phase Change ◽

Entropy Generation ◽

Phase Change Materials ◽

Transfer Problem ◽

Mass Conservation ◽

Melting Process ◽

Industrial Applications ◽

Inclined Magnetic Field

The encapsulation technique of phase change materials in the nanodimension is an innovative approach to improve the heat transfer capability and solve the issues of corrosion during the melting process. This new type of nanoparticle is suspended in base fluids call NEPCMs, nanoencapsulated phase change materials. The goal of this work is to analyze the impacts of pertinent parameters on the free convection and entropy generation in an elliptical-shaped enclosure filled with NEPCMs by considering the effect of an inclined magnetic field. To reach the goal, the governing equations (energy, momentum, and mass conservation) are solved numerically by CVFEM. Currently, to overcome the low heat transfer problem of phase change material, the NEPCM suspension is used for industrial applications. Validation of results shows that they are acceptable. The results reveal that the values of N u ave descend with ascending Ha while N gen has a maximum at Ha = 16 . Also, the value of N T , MF increases with ascending Ha . The values of N u ave and N gen depend on nondimensional fusion temperature where good performance is seen in the range of 0.35 < θ f < 0.6 . Also, Nu ave increases 19.9% and ECOP increases 28.8% whereas N gen descends 6.9% when ϕ ascends from 0 to 0.06 at θ f = 0.5 . Nu ave decreases 4.95% while N gen increases by 8.65% when Ste increases from 0.2 to 0.7 at θ f = 0.35 .

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Finite Element Simulations for Entropy Generation Measurement in Single Phase Flow of Water Based Nanofluid Filled in Square Cavity under Appliance of Inclined Magnetic field

10.21203/rs.3.rs-151378/v1 ◽

2021 ◽

Author(s):

S. Bilal

Keyword(s):

Magnetic Field ◽

Finite Element ◽

Entropy Generation ◽

Flow Behavior ◽

Vertical Direction ◽

Convective Heating ◽

Generation Process ◽

Inclined Magnetic Field ◽

Square Enclosure ◽

Energy Equations

Abstract Current communication candidly explicates entropy generation process generated due to natural convective heating in square enclosure saturated with nanofluid. Water is used as base fluid and Cu particles are induced to depict enhancement in thermo physical characteristics. Natural convection in enclosure is produced by providing temperature difference on boundaries. Upper wall is provided uniform temperature while rest of walls are kept cold. Impermeability and non-slip conditions are imposed on all walls. Mathematical structuring of considered problem is manifested via continuity, momentum and energy equations under appliance of inclined magnetic field. Thermo physical properties of nanoparticles along with base liquids are used during mathematical structuring. Finite element procedure is adopted to elucidate flow features. Discretization of domain is done by applying hybrid meshing. Velocity and isothermal plots are drawn against concerning parameters. Comprehensive description of energy generation by measuring variation in magnetic, viscous, total and thermal irreversibility’s are also presented. Cut lines representing velocity field in horizontal and vertical direction are also drawn to predict flow behavior at different locations.

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