Mixed convection heat and surface mass transfer between power-law fluids and rotating permeable bodies

Kleinstreuer, Clement; Wang, Tian-Yih

doi:10.1016/0009-2509(89)85108-5

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…For example, in the molecular evaporator, 23 the combined effect of heat and mass transfer plays an integral part in the performance of the liquid film. Other applications include electrochemical phenomena, 24 polymer processing, 25 and adsorption processes 26 . Many such studies have been done within the boundary layer theory.…”

Section: Introductionmentioning

confidence: 99%

Entropy generation analysis in magnetohydrodynamic Sisko nanofluid flow with chemical reaction and convective boundary conditions

Bisht

Sharma

2020

Math Methods in App Sciences

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The main emphasis of the present study is to analyze the novel feature of entropy generation in the flow and heat transfer of Sisko nanofluid over a stretching sheet in the presence of the magnetic field, chemical reaction, and convective boundary conditions. Buongiorno's nanofluid model is used to consider the effect of Brownian diffusion and thermophoresis. The governing Sisko nanofluid flow equations comprising the momentum, nanoparticle volume fraction, and energy are reduced to nonlinear differential equations by utilizing appropriate similarity variables. The numerical solution of nonlinear coupled differential equations is obtained using the finite difference scheme in combination with the quasilinearization technique. The impact of different physical parameters on velocity, nanoparticle volume fraction, and temperature is presented graphically. The variation in entropy generation and Bejan number with different pertinent parameters that characterize the entropy generation phenomenon for the flow of Sisko nanofluid is discussed. The obtained results indicate that the entropy generation enhances with an increase in the magnetic parameter, Brinkman number, and thermal Biot number while reduces with the Sisko material parameter. Moreover, the behavior of mass and heat transfer rates is displayed through the Brownian diffusion parameter and thermophoresis parameter. The analysis of entropy generation minimization has crucial applications in the industrial heat transfer problems, solar heat exchanger, turbomachinery designing, LED‐based spotlights, designing of air‐cooled gas turbine blades, cooling in nuclear fuel rods, rotating reactors, in chillers, air separators, and so forth. Furthermore, entropy generation with MHD flow has applications in MHD generators, nuclear reactors, flow meters, micropumps, power plants, and so forth.

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Section: Introductionmentioning

confidence: 99%

Entropy generation analysis in magnetohydrodynamic Sisko nanofluid flow with chemical reaction and convective boundary conditions

Bisht

Sharma

2020

Math Methods in App Sciences

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“…Many geometrical configurations have been addressed including flat plates, channels, cones, spheres, wedges, inclined planes, and wavy surfaces. Non-Newtonian heat transfer studies have included power-law fluid models [9][10][11] i. e. shear-thinning and shear thickening fluids, simple viscoelastic fluids [12,13], Criminale-Ericksen-Fibley viscoelastic fluids [14], Johnson-Segalman rheological fluids [15], Bingham yield stress fluids [16], second grade (Reiner-Rivlin) viscoselastic fluids [17], third grade viscoelastic fluids [18], micropolar fluids [19], and bi-viscosity rheological fluids [20]. Viscoelastic properties can enhance or depress heat transfer rates, depending upon the kinematic characteristics of the flow field under consideration and the direction of heat transfer [21].…”

Section: Introductionmentioning

confidence: 99%

Unsteady Free Convection in a Walter’s-B Viscoelastic Flow past a Semi-Infinite Vertical Plate with Radiation and Chemical Reaction

Rao¹,

Babu²,

Sheri³

2014

IOSRJM

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“…Al-Amiri et al studied steady mixed convection in a square lid-driven cavity under the combined buoyancy effects of thermal and mass diffusion. Conjugate-mixed-convection heat transfer in a lid-driven enclosure with a thick bottom surface was studied by Oztop et al Mixed-convection studies have also been carried out for various power-law fluids involving various applications. − …”

Section: Introductionmentioning

confidence: 99%

A Complete Heatline Analysis on Visualization of Heat Flow and Thermal Mixing during Mixed Convection in a Square Cavity with Various Wall Heating

Basak

Pradeep

Roy

2011

Ind. Eng. Chem. Res.

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A wide range of applications involving mixed-convection studies can be found in various engineering processes such as thermal discharge of water bodies, float glass production, heat exchangers, nuclear reactors, and crystallization process. The present study focuses on understanding the thermal mixing scenarios for mixed-convection lid-driven flow in a square cavity using heatlines. Thermal mixing is analyzed for four different thermal boundary conditions, and heat flow patterns in mixed convection are analyzed using Bejan's heatlines concept for wide ranges of parameters (Pr = 0.015À7.2, Re = 1À100, and Gr = 10 3 À10 5 , where Pr, Re, and Gr denote the Prandtl, Reynolds, and Grashof numbers, respectively). The results indicate that, at low Pr values (Pr = 0.015), the transport is conduction-dominant irrespective of the values of Gr and Re. The trends of heatlines and streamlines are identical near the core for high-Re cases. A single circulation cell was observed in the streamlines for any Pr g 0.7 at high Re and low Gr values for uniform heating of the bottom surface with cold side walls. It was observed that thermal mixing increased significantly with subsequent rises in Gr for high-Pr fluids. Patterns of heatlines and multiple circulation cells of heatlines were found to lead to enhanced thermal mixing, with the thermal boundary layer much compressed toward the walls for linearly heated side walls. The heat-transfer rates along the walls are illustrated by the local Nusselt number distribution based on gradients of heatfunctions for the first time in this work. Nusselt numbers with infinitely large magnitudes were observed at hotÀcold junctions, illustrating high heattransfer rates. An oscillatory distribution in the local heatfunction rate was observed as a result of sinusoidal heating of the bottom surface for high-Pr fluids. Negative heat-transfer rates or local Nusselt numbers were observed along the side walls when side wall(s) was/were linearly heated, as explained based on negative heatfunction gradients. Also, the effect of Gr on the local and average Nusselt numbers in different cases can be adequately explained based on heatlines. Dense heatlines signifying higher overall heattransfer rates along the bottom surface and side walls were observed for uniform bottom surface heating, whereas lower heat-transfer rates were observed for sinusoidal heating. Nonmonotonic distributions in overall heat-transfer rates along the bottom surface and left wall were observed when both walls were linearly heated, whereas a smooth and exponential increase was observed when the right wall was isothermally cooled.

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Mixed convection heat and surface mass transfer between power-law fluids and rotating permeable bodies

Cited by 7 publications

References 8 publications

Entropy generation analysis in magnetohydrodynamic Sisko nanofluid flow with chemical reaction and convective boundary conditions

Entropy generation analysis in magnetohydrodynamic Sisko nanofluid flow with chemical reaction and convective boundary conditions

Unsteady Free Convection in a Walter’s-B Viscoelastic Flow past a Semi-Infinite Vertical Plate with Radiation and Chemical Reaction

A Complete Heatline Analysis on Visualization of Heat Flow and Thermal Mixing during Mixed Convection in a Square Cavity with Various Wall Heating

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