Mixed convection of magnetohydrodynamic nanofluids inside microtubes at constant wall temperature

Moshizi, S.A.; Zamāni, Mahdi; Hosseini, S.J.; Malvandi, A.

doi:10.1016/j.jmmm.2017.01.053

Cited by 16 publications

(4 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mixed convection boundary layer flows, on the other hand, have a wide range of industrial applications, including central solar receivers, heat exchangers, nuclear reactors, and electronic devices [14]. The research works related to mixed convection have been published, where the effect of different parameters is considered [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. Khan et al [14] investigated the effect of heat absorption/generation in a nanofluid flow beyond an oscillatory stretching sheet.…”

Section: Introductionmentioning

confidence: 99%

“…Mahdavi et al [26] structured a discrete modeling nanoparticle flow. Hayat et al [27] and Moshizi et al [28] worked with Prandtl fluid and MHD nanofluids, respectively, and both of them considered peristaltic flow. The inclination angle of the stretching or shrinking sheet from the horizontal plane in a Newtonian fluid is studied by Azmi et al [29].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical study of mixed convection and buoyancy ratio on MHD fluid flow beyond an inclined sheet

2021

MHD

View full text Add to dashboard Cite

Mixed convection is commonly used in electronic cooling processes and nuclear reactor technology. As a result, this study aims to demonstrate the mathematical formulation of fluid flow, heat and mass transfer under the controlling physical parameters such as mixed convection, buoyancy ratio, suction, magnetic field, and rotation angle of the sheet. The variation in the wall shrinking velocity, temperature and concentration is expressed as an exponential function. Since controlling equations are partial differential equations, similarity transformations convert these partial differential equations to ordinary differential equations. Finally, these ordinary differential equations are considered as a non-linear and non-dimensional boundary value problem. The final solution of these ordinary differential equations is obtained numerically by applying the Matlab bvp4c programme. Stability analysis which determines the most stable numerical solution between duel solutions is also made using the Matlab bvp4c programme. Comparing the obtained computational results to previously published data shows a good agreement. All numerical results are graphically illustrated and explained, including the velocity, temperature and concentration profiles, skin friction coefficient, local Nusselt number, and local Sherwood number.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical study of mixed convection and buoyancy ratio on MHD fluid flow beyond an inclined sheet

2021

MHD

View full text Add to dashboard Cite

show abstract

“…With changing the migration modes of the Al 2 O 3 inside water and under the mixed convection of gas in vertical micro channels, they demonstrate the influence of the thermophysical variations on the heat transfer. S. A. Moshizi et al [30] present a study of magnetic field direction on transfers. They vary this direction in the case of the (MHD) nano fluids in isothermal micro tubes.…”

Section: Introductionmentioning

confidence: 99%

Evaporation of Water/Alumina Nanofluid Film by Mixed Convection Inside Heated Vertical Channel

2020

View full text Add to dashboard Cite

In industrial devices like heat recovery systems, heat pumps, as well as symmetric and complex engineering systems, a nano fluid mixture is used. Regarding the nature of the energy sources (thermal or thermal and electrical), many physical systems could represent possible applications in manufactural activities. The presence of nanoparticles inside a solvent is of great interest in order to optimize the efficacy of the nano-technology systems. The present work deals with heat and mass transfer through a vertical channel where an alumina/water film mixture flows on one of its plates. For simulation, we use a numerical method under mixed convection during water/alumina nano fluid evaporation. We heat the flown plate uniformly while the other is dry and exchange heat with a constant coefficient. The gas mixture enters channel with a constant profile. Results show that an augmentation of the volume rate of the nanoparticle disadvantages evaporation if the heating is absent. Otherwise, if the heating exists, an increasing volume rate of the nanoparticle advantages evaporation. We found also that the film velocity behavior when the volume rate of the nanoparticle varies, independent of the heating.

show abstract

“…The analysis of the results mainly focused on the effect of the power-law index on the flow and heat transfer characteristics. The behavior of magnetohydrodynamic nanofluids in vertical microtubes was considered by Moshizi et al [19] by taking into account the Brownian motion and the thermophoresis effect. They obtained an improvement of the thermal performance by increasing the magnetic field intensity and the slip velocity at the fluid-solid interface.…”

Section: Introductionmentioning

confidence: 99%

Mixed convection heat transfer and entropy generation analysis of copper–water nanofluid in a vertical channel with non-uniform heating

2019

View full text Add to dashboard Cite

This paper reports results of a numerical investigation on mixed convection heat transfer and entropy generation for water-copper nanofluid within a vertical channel. The left wall is subjected to a heat flux density of sinusoidal variation, while the right one is cooled at uniform density. The Buongiorno model is employed to describe the nanofluid flow in order to take into account the thermophoresis effect and the Brownian motion. The governing equations are solved numerically using the finite volume method with the SIMPLE algorithm. The effects of pertinent parameters including the Richardson number (Ri), the heat flux ratio (R q) and the nanoparticles volume fraction (ϕ i) on the flow and thermal fields, as well as the entropy generation are analyzed for both non-uniform and uniform heating. The results show that the heat transfer rate and the various irreversibility modes are increased with the rise of Ri and R q and the reduction of ϕ i. It is also found that a sinusoidal heating is beneficial for the mean Nusselt number but, unfortunately, it is not favorable for the total entropy generation with augmentation rates of up to 7% and 14%, respectively. A map of the flow reversal occurrence is performed and reveals that the latter is strongly affected by the control parameters. In addition, a correlation is proposed to predict the onset of this phenomena with a maximum deviation of 5% compared to the numerical results.

show abstract

Mixed convection of magnetohydrodynamic nanofluids inside microtubes at constant wall temperature

Cited by 16 publications

References 41 publications

Numerical study of mixed convection and buoyancy ratio on MHD fluid flow beyond an inclined sheet

Numerical study of mixed convection and buoyancy ratio on MHD fluid flow beyond an inclined sheet

Evaporation of Water/Alumina Nanofluid Film by Mixed Convection Inside Heated Vertical Channel

Mixed convection heat transfer and entropy generation analysis of copper–water nanofluid in a vertical channel with non-uniform heating

Contact Info

Product

Resources

About