Entropy generation applications in flow of viscoelastic nanofluid past a lubricated disk in presence of non-linear thermal radiation and Joule heating

Purpose The purpose of this paper is to examine the effect of non-linear thermal radiation, Joule heating and viscous dissipation on the mixed convection boundary layer flow of MHD nanofluid flow over a thin moving needle. Design/methodology/approach The equations directing the flow are reduced into ODEs by implementing similarity transformation. The Runge–Kutta–Fehlberg method with a shooting technique was implemented. Findings Numerical outcomes for the coefficient of skin friction and the rate of heat transfer are tabulated and discussed. Also, the boundary layer thicknesses for flow and temperature fields are addressed with the aid of graphs. Originality/value Till now, no numerical study investigated the combined influence of Joule heating, non-linear thermal radiation and viscous dissipation on the mixed convective MHD flow of silver-water nanofluid flow past a thin moving needle. The numerical results for existing work are new and their novelty verified by comparing them with the work published earlier.

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Entropy generation in magneto nanofluid flow with Joule heating and thermal radiation

World Journal of Engineering ◽

10.1108/wje-06-2019-0166 ◽

2020 ◽

Vol 17 (1) ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Mohamed Almakki ◽

Hiranmoy Mondal ◽

Precious Sibanda

Keyword(s):

Thermal Radiation ◽

Viscous Dissipation ◽

Entropy Generation ◽

Joule Heating ◽

Transfer Model ◽

Nanofluid Flow ◽

Content Type ◽

Flow Equations ◽

Micropolar Nanofluid ◽

The Impact

Purpose This paper aims to investigate entropy generation in an incompressible magneto-micropolar nanofluid flow over a nonlinear stretching sheet. The flow is subjected to thermal radiation and viscous dissipation. The energy equation is extended by considering the impact of the Joule heating term because of an imposed magnetic field. Design/methodology/approach The flow, heat and mass transfer model are solved numerically using the spectral quasilinearization method. An analysis of the performance of this method is given. Findings It is found that the method is robust, converges fast and gives good accuracy. In terms of the physically significant results, the authors show that the irreversibility caused by the thermal diffusion the dominants other sources of entropy generation and the surface contributes significantly to the total irreversibility. Originality/value The flow is subjected to a combination of a buoyancy force, viscous dissipation, Joule heating and thermal radiation. The flow equations are solved numerically using the spectral quasiliearization method. The impact of a range of physical and chemical parameters on entropy generation, velocity, angular velocity, temperature and concentration profiles are determined. The current results may help in industrial applicants. The present problem has not been considered elsewhere.

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Entropy generation optimization of MHD Jeffrey nanofluid past a stretchable sheet with activation energy and non-linear thermal radiation

Physica A Statistical Mechanics and its Applications ◽

10.1016/j.physa.2019.123437 ◽

2020 ◽

Vol 544 ◽

pp. 123437 ◽

Cited By ~ 4

Author(s):

Tasawar Hayat ◽

Mehreen Kanwal ◽

Sumaira Qayyum ◽

Ahmed Alsaedi

Keyword(s):

Activation Energy ◽

Thermal Radiation ◽

Entropy Generation ◽

Non Linear ◽

Jeffrey Nanofluid

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Entropy optimized dissipative flow of hybrid nanofluid in the presence of non-linear thermal radiation and Joule heating

Scientific Reports ◽

10.1038/s41598-021-95604-4 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Wei-Feng Xia ◽

M. U. Hafeez ◽

M. Ijaz Khan ◽

Nehad Ali Shah ◽

Jae Dong Chung

Keyword(s):

Thermal Radiation ◽

Joule Heating ◽

Flow Analysis ◽

Three Dimensional ◽

Lower Surface ◽

Hybrid Nanofluid ◽

Surface Drag ◽

Nonlinear Anal ◽

Flow Parameters ◽

Non Linear

AbstractPresent article reads three dimensional flow analysis of incompressible viscous hybrid nanofluid in a rotating frame. Ethylene glycol is used as a base liquid while nanoparticles are of copper and silver. Fluid is bounded between two parallel surfaces in which the lower surface stretches linearly. Fluid is conducting hence uniform magnetic field is applied. Effects of non-linear thermal radiation, Joule heating and viscous dissipation are entertained. Interesting quantities namely surface drag force and Nusselt number are discussed. Rate of entropy generation is examined. Bvp4c numerical scheme is used for the solution of transformed O.D.Es. Results regarding various flow parameters are obtained via bvp4c technique in MATLAB Software version 2019, and displayed through different plots. Our obtained results presents that velocity field decreases with respect to higher values of magnetic parameter, Reynolds number and rotation parameter. It is also observed that the temperature field boots subject to radiation parameter. Results are compared with Ishak et al. (Nonlinear Anal R World Appl 10:2909–2913, 2009) and found very good agreement with them. This agreement shows that the results are 99.99% match with each other.

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Hall current and joule heating effects on free convection flow of a nanofluid over a vertical cone in presence of thermal radiation

Thermal Science ◽

10.2298/tsci160413083a ◽

2017 ◽

Vol 21 (6 Part A) ◽

pp. 2609-2620 ◽

Cited By ~ 3

Author(s):

Wael Abbas ◽

Emad Sayed

Keyword(s):

Thermal Radiation ◽

Joule Heating ◽

Volume Fraction ◽

Hall Current ◽

Flow Behavior ◽

Nanoparticle Volume Fraction ◽

Vertical Cone ◽

Local Skin ◽

Special Cases ◽

Non Linear

The effects of Hall current and Joule heating on flow and heat transfer of a nanofluid along a vertical cone in the presence of thermal radiation is considered. The flow is subjected to a uniform strong transverse magnetic field normal to the cone surface. Similarity transformations are used to convert the non-linear boundary- layer equations for momentum and energy equations to a system of non-linear ordinary differential equations which are then solved numerically with appropriate boundary conditions. The solutions are presented in terms of local skin friction, local Nusselt number, velocity, and temperature profiles for values of magnetic parameter, Hall parameter, Eckert number, radiation parameter, and nanoparticle volume fraction. Comparison of the numerical results made with previously published results under the special cases, the results are found to be in an excellent agreement. It is also found that, nanoparticle volume fraction parameter and types of nanofluid play an important role to significantly determine the flow behavior.

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Finite element analysis of micropolar nanofluid flow through an inclined microchannel with thermal radiation

Multidiscipline Modeling in Materials and Structures ◽

10.1108/mmms-11-2019-0198 ◽

2020 ◽

Vol 16 (6) ◽

pp. 1521-1538 ◽

Cited By ~ 1

Author(s):

N.S. Shashikumar ◽

Madhu Macha ◽

B.J. Gireesha ◽

Naikoti Kishan

Keyword(s):

Finite Element ◽

Thermal Radiation ◽

Entropy Generation ◽

Joule Heating ◽

Volume Fraction ◽

Entropy Generation Rate ◽

Nanofluid Flow ◽

Content Type ◽

Micropolar Nanofluid ◽

Flow Through

PurposeIn recent years, microfluidics has turned into a very important region of research because of its wide range of applications such as microheat exchanger, micromixers fuel cells, cooling systems for microelectronic devices, micropumps and microturbines. Therefore, in this paper, micropolar nanofluid flow through an inclined microchannel is numerically investigated in the presence of convective boundary conditions. Heat transport of fluid includes radiative heat, viscous and Joule heating phenomena.Design/methodology/approachGoverning equations are nondimensionalized by using suitable dimensionless variables. The relevant dimensionless ordinary differential systems are solved by using variational finite element method. Detailed computations are done for velocity, microrotation and temperature functions. The influence of various parameters on entropy generation and the Bejan number is displayed and discussed.FindingsIt is established that the entropy generation rate increased with both Grashof number and Eckert number, while it decreased with nanoparticle volume fraction and material parameter. Temperature is decreased by increasing the volume fraction of Ag nanoparticle dispersed in water.Originality/valueAccording to the literature survey and the best of the author’s knowledge, no similar studies have been executed on micropolar nanofluid flow through an inclined microchannel with effect of viscous dissipation, Joule heating and thermal radiation.

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