The impact of thermal stratification and heat generation/absorption on MHD carreau nano fluid flow over a permeable cylinder

Gopal, D.; Naik, S. Hari Shing; Kishan, N.; Raju, C. S. K.

doi:10.1007/s42452-020-2445-5

Cited by 27 publications

(10 citation statements)

References 34 publications

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“…Gopal et al [27] observed Brownian and thermophoresis effects on Casson nanofluid over a chemically reacting stretching sheet with an inclined magnetic field. A non-uniform heat generation or absorption of a stagnation point flow of nanofluid over an exponentially stretching sheet was discussed by Malvandi et al Gopal et al [36] employed the Runge-Kutta method for different geometrical models and resulted in numerically using MATLAB software. Sivaraj [37] analyzed the heat and mass transfer characteristics of cross nanofluid in stagnation point flow over a permeable extending or contracting surface.…”

Section: Numerical Modelmentioning

confidence: 99%

Three dimensional MHD nanoluid stagnation point low withhigher order chemical reaction

Jagadha

Gopal

KUMAR

et al. 2022

Journal of Thermal Engineering

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In hot and dry climates, evaporative cooling of the air by water spray can be applied in several requirements, such as evaporative condensers which the airflow is precooled by the water spray before it reaches the condenser. The interaction between water droplets and the air is a complicated two-phase flow that is affected by the several parameters. Here, an Eulerian-Lagrangian 3D model was developed to investigate the influence of important parameters on spray cooling performance in a rectangular duct. The evaluated parameters include the number of nozzles, inlet air flow rate, and spray water flow rate. The results represented that growth in the number of nozzles causes a reduction in the spray cooling efficiency. Thi s is due to decrease of droplets retention time within the duct by increasing the number of nozzles at a constant total spray flow rate in the cases. The maximum and minimum spray cooling efficiency be long to th e ca ses wi th on e no zzle at water flo w rat e of 20 l/h and fou r nozzle at water flow rate of 5 l/h, respectively. The difference between spray cooling efficiency at 3 and 4 number of nozzles is less than 1.8%. Moreover, increasing the air flow rate from 0.5 l/h to 2 l/h (by 300%) makes a decrease in the spray cooling efficiency up to 58.6%.

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Section: Numerical Modelmentioning

confidence: 99%

Three dimensional MHD nanoluid stagnation point low withhigher order chemical reaction

Jagadha

Gopal

KUMAR

et al. 2022

Journal of Thermal Engineering

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“…The obtained results have been astonishing, encouraging researchers to explore these new kinds of fluids more extensively. The industrial importance of hybrid nanofluids is unimaginable, as hybrid nanofluids enhance heat transfer rates, reduce skin friction, and reduce production costs [ 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical and Thermal Investigation of Magneto-Hydrodynamic Hybrid Nanoparticles (SWCNT-Ag) under Rosseland Radiation: A Prescribed Wall Temperature Case

et al. 2022

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Thermal heat generation and enhancement have been examined extensively over the past two decades, and nanofluid technology has been explored to address this issue. In the present study, we discuss the thermal heat coefficient under the influence of a rotating magneto-hydrodynamic hybrid nanofluid over an axially spinning cone for a prescribed wall temperature (PWT) case. The governing equations of the formulated problem are derived by utilizing the Rivlin–Ericksen tensor and boundary layer approximation (BLA). We introduce our suppositions to transform the highly non-linear partial differential equations into ordinary differential equations. The numerical outcomes of the problem are drafted in MATLAB with the of help the boundary value problem algorithm. The influences of several study parameters are obtained to demonstrate and analyze the magneto-hydrodynamic flow characteristics. The heat and mass transfer coefficients increase and high Nusselt and Sherwood numbers are obtained with reduced skin coefficients for the analyzed composite nanoparticles. The analyzed hybrid nanofluid (SWCNT-Ag–kerosene oil) produces reduced drag and lift coefficients and high thermal heat rates when compared with a recent study for SWCNT-MWCNT–kerosene oil hybrid nanofluid. Maximum Nusselt (Nu) and Sherwood (Sh) numbers are observed under a high rotational flow ratio and pressure gradient. Based on the results of this study, we recommend more frequent use of the examined hybrid nanofluid.

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“…Madhu et al 9 reconnoitered the second law performance and entropy generation in the flow of Carreau fluid due to an inclined microchannel in the presence of the radiative heated convective condition. Analysis of magnetohydrodynamic (MHD) boundary layer flow of Carreau fluid pattern by a stretched permeable sheet due to both of the dependence of viscosity and thermal conductivity on the temperature has been executed by Abbas et al 10 Gopal et al 11 introduced a solution for the influence of the magnetic field, heat generation/absorption, thermal radiation, and thermal stratification on the flow of Carreau nanofluid over the surface of a permeable stretched cylinder.…”

Section: Introductionmentioning

confidence: 99%

Activation energy effectiveness in dusty Carreau fluid flow along a stretched cylinder due to nonuniform thermal conductivity property and temperature‐dependent heat source/sink

et al. 2021

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This article studies the boundary layer flow analysis and heat and mass transfer of magnetohydrodynamic (MHD) Carreau fluid around a stretchable circular cylinder, comprehensively studying the suspended dust particles' impact. Here, the viscous fluid is theorized to be incompressible and loaded with spherical dust particles of the same size. Additionally, heat and sink sources are examined in the thermal boundary layer in the existence of both chemical reaction and activation energy influences. A compatible similarity set of transformations are utilized to mutate the system of partial differential equation formed in momentum and temperature equations of the fluid and dust phases as well the concentration equation into a set of ordinary differential equations. Therefore, the mathematical analysis of the problem facilitates and the numerical estimates of the problem are obtained using MATLAB bvp4c function. Computations are iterated for various values of emerging physical parameters from dimensionless boundary layer conservation equations in terms of temperature and non‐Newtonian Carreau velocity of fluid and dust phases and concentration distribution. Moreover, the terminology of skin friction and Nusselt and Sherwood numbers have been obtained and studied numerically. Some interesting findings in this study are the heat transfer rate dwindles due to the increase of mass concentration of the dust particle. Also, there is a strengthening of the flow with variance in values of the curvature parameter while a weakening has been observed in the thickness of the thermal boundary layer and this hence improves the heat transfer rate. Therefore, the fluid flow around a stretched cylinder would be better, due to its multiple applications in various progressing industrial technologies such as the cement processing industry, plastic foam processing, watering system channels, and so forth. Also, activation energy plays a significant role in various areas such as the oil storage industry, geothermal, and hydrodynamics. The dusty fluid flow is very important in the field of fluid dynamics and can be found in many natural phenomena such as blood flow, the flow of mud in rivers, and atmospheric flow during mist. Moreover, MHD applications are numerous including power generation, plasma, and liquid metals, and so forth. A perfect agreement between our results and other studies available in the literature is obtained through carrying out a comparison with treating the problem in special circumstances.

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The impact of thermal stratification and heat generation/absorption on MHD carreau nano fluid flow over a permeable cylinder

Cited by 27 publications

References 34 publications

Three dimensional MHD nanoluid stagnation point low withhigher order chemical reaction

Three dimensional MHD nanoluid stagnation point low withhigher order chemical reaction

Numerical and Thermal Investigation of Magneto-Hydrodynamic Hybrid Nanoparticles (SWCNT-Ag) under Rosseland Radiation: A Prescribed Wall Temperature Case

Activation energy effectiveness in dusty Carreau fluid flow along a stretched cylinder due to nonuniform thermal conductivity property and temperature‐dependent heat source/sink

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