Laminar natural convection of power‐law fluids over a horizontal heated flat plate

Bahmani, Alireza; Kargarsharifabad, Hadi

doi:10.1002/htj.21420

Cited by 17 publications

(8 citation statements)

References 32 publications

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“…The influence of velocity slip on the MHD peristaltic transport of a Casson fluid and transfer of heat through an asymmetric channel cantaining a porous media was assessed 35 . Over a horizontal, flat plate with a constant heat flux, natural convection of power-law fluids was investigated 36 . Many authors have recently investigated the MHD convection for diffrent fluids under effect of heat transfer in the articles [37][38][39] and 40,41 .…”

Section: List Of Symbols Amentioning

confidence: 99%

Peristaltic transport characteristics of a second-grade dusty fluid flown with heat transfer through a tube revisited

Hafez

Alsemiry

Alharbi

et al. 2022

Sci Rep

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This paper provides a rudimentary insight into the influence of heat transfer on the transport characteristics of a second-grade dusty fluid flown in a flexible tube with walls subjected to the peristaltic motion. Both dust particles and fluid movements were modeled using the coupled differential equations. The effects of different types of parameters such as Reynolds number, Prandtl number, Grashof number, wave number, wave amplitude ratio, second grade parameter as well as nature of the heat source and sink are studies on the dust particles velocity, fluid velocity, temperature, pressure profiles of the fluid and streamline patterns of the fluid. The derived equations were solved analytically via the standard perturbation method to determine the fluid temperature, streamline pattern and velocity of the dust particles as well as fluid. The values in the increase of pressure and frictional forces were calculated numerically using DSolve of the Mathematica 11 software (https://www.wolfram.com/mathematica/new-in-11/). In addition, the trapping mechanisms were ascertained by computing the streamlines and various physical parameters. The obtained results were validated with the state-of-the-art literature reports. It was claimed that our systematic approach may constitute a basis for accurately examining the impact of heat transfer on the peristaltic transport of a complex fluid through narrow tubes, useful for diverse medical applications such as the gastric fluid flow through the small intestine during endoscopy. Numerical results are computed and discussed numerically and presented through graphs. The impacts of pertinent parameters on the aforementioned quantities are examined by plotting graphs on the basis of computational results. The results indicate that the effect of parameters is very pronounced. A suitable comparison has been made with the prior results in the literature as a limiting case of the considered problem.

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Section: List Of Symbols Amentioning

confidence: 99%

Peristaltic transport characteristics of a second-grade dusty fluid flown with heat transfer through a tube revisited

Hafez

Alsemiry

Alharbi

et al. 2022

Sci Rep

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“…The group theory analysis [29] provides that the following combinations of the variables give the absolute invariants:…”

Section: Mathematical Analysismentioning

confidence: 99%

Magnetohydrodynamic free convection of non-Newtonian power-law fluids over a uniformly heated horizontal plate

Bahmani

Kargarsharifabad

2020

THERM SCI

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The MHD free convection flow of non-Newtonian power-law fluids over a horizontal plate subjected to a constant heat flux is studied. The results are presented for various values of the three influential parameters, i. e. the generalized Hartmann number, the generalized Prandtl number, and the non-Newtonian power-law viscosity index. Increasing the Hartmann number increases the thermal boundary-layer thickness and the surface temperature and consequently decreases the wall skin friction and Nusselt number. A lower generalized Prandtl number results in a larger skin friction coefficient and higher wall temperature as well as thicker thermal boundary-layer. The viscosity index is predicted to influence the flow conditions depending on the value of generalized Hartmann number. At high generalized Prandtl number numbers, by decreasing non-Newtonian power-law index, the wall skin friction, temperature scale, and thermal boundary-layer thickness are increased and the Nusselt number is decreased, while the opposite trend is observed for low generalized Prandtl number. A general correlation for the Nusselt number is derived using the numerical results.

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“…The study revealed that increase in nanoparticles volume fraction affect the entropy production more than enhancement in heat transfer rate. A Bahmani [31] investigated horizontal flat plate HXs under natural convection and constant heat flux. The results revealed that for Prandtl number higher than 1, low Nusselt number was achieved.…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis and optimization of L-shape fin heat sink under natural convection using ANOVA and Taguchi

2022

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Advancement in electronic systems resulted in miniaturization and high-power densities. Therefore, the rate of heat generation in circuit board increased dramatically. To overcome the problem of overheating, numerous heat sink designs are proposed including L-shape fins heat sink. The thermo-fluidic flow behavior and temperature difference are analyzed to get better understanding of heat transfer from the sink to ambient air. Governing equations for the model of conjugate heat transfer in three-dimensional environment are solved and discretized across the computational domain. Numerous experiments are carried out to validate the numerical results. The effect of fin numbers, height and heat sink size at three different input power is reported. Furthermore, ANOVA and Taguchi statistical methods are used to predict parameters that affect the heat transfer. The study revealed that fin height affects the heat transfer rate the most, and accounts for 25.3 percent increase in heat transfer rate. Optimization of the heat sink is carried out to ensure better efficiency of the proposed HS. The optimized conditions for the sink are observed to be heat sink size of 90mm, 9 number of fins and 33mm of fin height.

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Laminar natural convection of power‐law fluids over a horizontal heated flat plate

Cited by 17 publications

References 32 publications

Peristaltic transport characteristics of a second-grade dusty fluid flown with heat transfer through a tube revisited

Peristaltic transport characteristics of a second-grade dusty fluid flown with heat transfer through a tube revisited

Magnetohydrodynamic free convection of non-Newtonian power-law fluids over a uniformly heated horizontal plate

Thermal analysis and optimization of L-shape fin heat sink under natural convection using ANOVA and Taguchi

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