Effect of heat transfer on the flow of a second‐grade fluid in divergent/convergent channel

Hayat, Tasawar; Nawaz, M.; Sajid, Muhammad

doi:10.1002/fld.2170

Cited by 23 publications

(8 citation statements)

References 31 publications

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“…Besides, in Figure 2, for verification, the results for a special case (Ha=0, De=0.8, Re=40, and α=5 o ) is plotted and compared with the that of Ref. [12]. It can be seen that there is good agreement between th two.…”

Section: 1 Numerical Methodsmentioning

confidence: 60%

“…The results showed that the maximum velocity is obtained in the middle section of the divergent channel. Hayat et al [12] studied the effects of a second-grade fluid flow in a divergent channel, and showed that the dimensionless velocity is a function of Reynolds number and divergent angle which reduces the velocity. However, when Deborah number increases, the velocity is also increased.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Non-uniform Magnetic Field on Non-newtonian Fluid Separation in a Diffuser

Moghimi

Abbasi

Jamei

et al. 2020

IJE

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The purpose of the present study is to investigate the boundary layer separation point in a magnetohydrodynamics diffuser. As an innovation, the Re value on the separation point is determined for the non-Newtonian fluid flow under the influence of the non-uniform magnetic field due to an electrical solenoid, in an empirical case. The governing equations including continuity and momentum are solved by applying the semi-analytical collocation method (C.M.). The analysis revealed that for specific values of De from 0.4 to 1.6, α from 20 o to 2.5 o and Ha from zero to 8, the Re value on the separation point is increased from 52.94 to 1862.78; thus, the boundary layer separation postponed. Furthermore, the impact of the magnetic field intensity on the separation point is analyzed from the physical point of view. It is observed the wall shear stress increases by increasing magnetic field intensity that leads to delaying the boundary layer separation.

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Section: 1 Numerical Methodsmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Effect of Non-uniform Magnetic Field on Non-newtonian Fluid Separation in a Diffuser

Moghimi

Abbasi

Jamei

et al. 2020

IJE

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“…Due to this fact in recent years, the study of viscoelastic fluids gains considerable attention of researchers working in this area. Some important investigations reflecting the viscoelastic effects are presented by [30][31][32][33][34][35][36]. Heat transfer in viscoelastic fluids due to boundary-layer in the presence of thermal radiations and constant suction is discussed by [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

An iterative approach to viscoelastic boundary-layer flows with heat source/sink and thermal radiation

et al. 2020

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In this study effect of radiation on the viscoelastic Walter-B fluid is investigated with heat sink/source. Sakiadis, Blasius, and stagnation point flows are considered at constant surface temperature. Some suitable similarity variables have been utilized to transform governing equations into ODE. An iterative approach based on the Legendre wavelet spectral collocation method is applied for the solution of the resulting equations. The obtained results are validated by plotting the residual error curves in each case. Temperature and heat transfer rate at wall are analyzed to investigate the influence of involved parameters. It is found that the Legendre wavelet spectral collocation method is very efficient and can be employed for the solutions of various non-Newtonian flow problems.

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“…Change in angle plays an important role in these flows as discussed in various studies. The work for non-Newtonian nature of the fluid has been presented by Hayat et al 9 and Asadullah et al 10 Some other related studies are available in open literature [11][12][13][14] and references therein. Nanofluids, as the name suggests, are the suspensions of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of magnetohydrodynamic flow and heat transfer of copper–water nanofluid in a channel with non-parallel walls considering different shapes of nanoparticles

Mohyud‐Din

Khan

Hassan

2016

Advances in Mechanical Engineering

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This article presents the magnetohydrodynamic flow and heat transfer of water-based nanofluid in divergent and convergent channels. Equations governing the flow are transformed to a set of ordinary differential equations by employing suitable similarity transforms. Resulting system is solved using a strong numerical procedure called Runge-Kutta-Fehlberg method. Results are compared with existing solutions available in the literature and an excellent agreement is seen. Three shapes of nanoparticles, namely, platelet-, cylinder-, and brick-shaped particles, are considered to perform the analysis. Influence of emerging parameters such as channel opening, Reynolds number, magnetic parameter, Eckert number, and the nanoparticle volume fraction are heighted with the help of graphs coupled with comprehensive discussions. The magnetic field can be used as a controlling parameter to reduce the backflow regions for the divergent channel case. Temperature of the fluid can be controlled with the help of strong magnetic field. It is also observed that platelet-shaped particles have higher temperature values as compared to cylinder-and brick-shaped particles.

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Effect of heat transfer on the flow of a second‐grade fluid in divergent/convergent channel

Cited by 23 publications

References 31 publications

Effect of Non-uniform Magnetic Field on Non-newtonian Fluid Separation in a Diffuser

Effect of Non-uniform Magnetic Field on Non-newtonian Fluid Separation in a Diffuser

An iterative approach to viscoelastic boundary-layer flows with heat source/sink and thermal radiation

Numerical investigation of magnetohydrodynamic flow and heat transfer of copper–water nanofluid in a channel with non-parallel walls considering different shapes of nanoparticles

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