Numerical Estimation of Thermal Radiation Effects on Marangoni Convection of Dusty Fluid

Siddiqa, Sadia; Begum, Naheed; Hossain, Md. Anwar; Al‐Rashed, Abdullah A.A.A.

doi:10.1115/1.4037209

Cited by 2 publications

(1 citation statement)

References 25 publications

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“…In the present study, we would like to address the unsteady squeezing flow of non-Newtonian Casson fluid between parallel disks under the combined effects of viscous dissipation, heat generation/absorption (a few examples of applications in which heat generation/absorption plays a major rule in geothermal heat exchangers and underground disposal of radioactive waste material [30]), and thermal radiation which has recently attracted a significant interest from the research community [31,32]. Furthermore, lower disk is considered to be permeable with suction or injection.…”

Section: Introductionmentioning

confidence: 99%

Flow and convective heat transfer of Casson fluid between squeezing porous disks in the presence of thermal radiation, viscous dissipation, and variable heat source/sink

Ahmadpour

Nasiri

Khazayinejad

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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In the present study, the combined effect of non-uniform heat source/sink, suction/injection, thermal radiation, and viscous dissipation is investigated on the unsteady squeezing flow and heat transfer of non-Newtonian Casson fluids. By means of a suitable similarity transformation, the governing equations are converted to a set of non-linear ordinary differential equations which are solved analytically applying Homotopy perturbation method. In addition, convergence of the derived solution is examined by comparing the analytical solution with a corresponding numerical solution obtained by the fourthorder Runge-Kutta method. An excellent agreement is observed between the analytical and numerical results. The influences of relevant parameters on the velocity and temperature fields, skin friction coefficient, and local Nusselt number are demonstrated in details. The results reveal that temperature is an increasing function of the heat generation parameter. Furthermore, the velocity and temperature profiles grow with increase the suction parameter.

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Section: Introductionmentioning

confidence: 99%

Flow and convective heat transfer of Casson fluid between squeezing porous disks in the presence of thermal radiation, viscous dissipation, and variable heat source/sink

Ahmadpour

Nasiri

Khazayinejad

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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Numerical computation on Marangoni convective flow of two‐phase MHD dusty nanofluids under Brownian motion and thermophoresis effects

Kalpana¹,

Madhura

Iyengar

2019

Heat Trans. Asian Res.

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dusty nanofluids, Marangoni convection, space-dependent heat source, two-phase flow, wavy surface | INTRODUCTIONThe Marangoni convection is a phenomenon, which is induced by thermocapillarity or solutocapillarity, that is, the variation of surface tension of the fluid with temperature or concentration. Surface tension is one of the fluid characteristics, which remain stable basically. However, the primary conditions affecting the surface tension of the fluid are variation in temperature and addition of chemicals in it. When temperature rises, the molecules in the fluid become more active, which results into the reduction in the surface tension of the fluid. Also, it changes according to the chemical reactions that occur when the chemicals are added to the fluid. Further, the surface tension of the fluid also gets affected by impurities present in it. For instance, the salt which is a highly solvable substance, increases the surface tension of water, whereas the soap, which is a sparingly soluble substance, decreases it. Hence, it is worthy to investigate the Marangoni effect on dusty nanofluid flow. The study on Marangoni convection is essential in view of numerous industrial applications including crystal growth, thin liquid films, semiconductor processing, coating flow technology, microfluidics, etc. After a promising research, this mechanism has been adopted in the field of nanotechnology to get an artificial rain by a process called cloud seeding. Here, substances like dry ice (silver iodide aerosol is commonly used, which acts as a cloud condenser) is dispersed into the upper parts of clouds, which alters the surface tension and then causes microphysical changes within the clouds. Therefore, condensation of water vapor in the atmosphere occurs. One of the widely practiced applications using this effect is suppressing the fog in airports during harsh weather. The concept of Marangoni boundary layer was introduced by Napolitano, 1 and, later, several authors 2-7 studied the flow under the Marangoni effect. It is evident from Mahanthesh et al 8 that Marangoni effect enhances the temperature and concentration fields of Casson liquid flow due to an infinite disk. The buoyancy and thermocapillary effect on convective fluid flow and transfer of heat inside a vertical cylindrical cavity under the impact of evaporation was evaluated numerically by Kozhevnikov and Sheremet. 9 Siddiqa et al 10 have assessed the effect of thermal radiation on Marangoni boundary layer flow along a vertical irregular surface and their mathematical results disclosed that water-particle mixture, that is, dusty fluid, reduces the heat transfer rate.The mechanism of heat transfer plays a significant role in hypersonic, space vehicles, gas turbines, etc. In those applications, the thermal performance of commonly employed traditional fluids like water, oils, glycol, etc, is deficient. With the intention of boosting the thermal conductivity of these base fluids, several processes, such as adding surfactant, salts, alcohol to the base fluids, inc...

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Numerical Estimation of Thermal Radiation Effects on Marangoni Convection of Dusty Fluid

Cited by 2 publications

References 25 publications

Flow and convective heat transfer of Casson fluid between squeezing porous disks in the presence of thermal radiation, viscous dissipation, and variable heat source/sink

Flow and convective heat transfer of Casson fluid between squeezing porous disks in the presence of thermal radiation, viscous dissipation, and variable heat source/sink

Numerical computation on Marangoni convective flow of two‐phase MHD dusty nanofluids under Brownian motion and thermophoresis effects

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