Magnetic field effect on natural convection and entropy generation in a half-moon shaped cavity with semi-circular bottom heater having different ferrofluid inside

Mojumder, Satyajit; Rabbi, Khan Md.; Saha, Sourav; Hasan, Mahmud; Saha, Suvash C.

doi:10.1016/j.jmmm.2016.01.046

Cited by 52 publications

(20 citation statements)

References 36 publications

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“…Heat carrying capacity of liquid is less compared to solids. Ferrofluids have superior properties which includes variable viscosity, improved thermal conductivity and formation of spike like structure in the presence of an external magnetic field [6,8]. Addition of ferro particles or nano particles into cooling water of IC Engines increases the heat transfer which results in the size reduction of heat exchanger [9].…”

Section: Introductionmentioning

confidence: 99%

CFD simulation for evaluation of optimum heat transfer rate in a heat exchanger of an internal combustion engine

Kocheril

Elias

2020

Int. J. Simul. Multidisci. Des. Optim.

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Heat exchanger is an essential component of an engine cooling system. Radiators are compact heat exchangers used to transfer the heat absorbed from engine to the cooling media. The jacket cooling water gets cooled and re-circulated into system after exchanging the heat with cooling water in a heat exchanger. Conventional fluids like water, oil, ethylene glycol, etc. possess less heat transfer performance; therefore, it is essential to have a compact and effective heat transfer system to obtain the required heat transfer. A reduction in energy consumption is possible by improving the performance of heat exchanging systems and incorporating various heat transfer enhancement techniques. In this paper, the heat transfer rate using nano-sized ferrofluid with and without magnetization is analysed using CFD simulation and compared with the experimental values obtained from a heat exchanger using water as base fluid. The heat transfer rate is measured using different combinations by varying the percentage of nano particles and by introduction of different magnetic intensity (gauss) on to the ferrofluid. The optimum heat transfer rate and efficiency of heat exchanger is calculated with the different combinations and the values are compared with the values of CFD simulation. CFD simulation was undertaken for water alone as cooling media and for water with ferro particle addition from 2% to 5%. The difference in temperature observed to be similar with experimental values. The deviation is within the acceptable limit and therefore the experimental findings are validated. The experiment was conducted on a parallel flow heat exchanger with water alone as cooling media, water with varying percentage of ferro fluid and water with varying magnetic intensity on ferrofluid. Percentage of ferro particles added up to where the optimum temperature difference could be obtained and the magnetic intensity also varied up to the optimum value.

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Section: Introductionmentioning

confidence: 99%

CFD simulation for evaluation of optimum heat transfer rate in a heat exchanger of an internal combustion engine

Kocheril

Elias

2020

Int. J. Simul. Multidisci. Des. Optim.

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“…Several studies discovering ferroliquid notion of heat and mass transfer (see refs. [6][7][8][9][10][11][12][13][14]). It is familiar nowadays that all non-Newtonian materials in view of their various characteristics are not scrutinized by one constitutive relation.…”

Section: Introductionmentioning

confidence: 99%

Analysis of modified Fourier law in flow of ferromagnetic Powell–Eyring fluid considering two equal magnetic dipoles

et al. 2019

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The target of the current study is to inspect theoretically 2D boundary layer flow of an Eyring–Powell ferromagnetic liquid over a flat plate. An external magnetic field due to two magnetic dipoles is applied. Modified Fourier law of heat flux model is employed. Constitutive relations for Eyring–Powell fluid are considered in the boundary layer flow analysis. Series results to the nonlinear formulation are derived and scrutinized by homotopic scheme. Characteristics of various parameters like magneto-thermomechanical (ferrohydrodynamic) interaction parameter, Prandtl number, and dimensionless thermal relaxation on temperature profile are displayed via graphs. It is noted that temperature field decays via thermal relaxation factor.

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“…Sekar et al [20] investigated the Soret effect with regard to thermoconvective instability in a ferrofluid layer using the Brinkman and Darcy models. Mojumder et al [8] investigated the magnetohydrodynamic convection in a half-moon shaped cavity filled with a ferrofluid.…”

Section: Introductionmentioning

confidence: 99%

Thermal Convection in a Ferromagnetic Fluid Layer with Magnetic Field Dependent Viscosity: A Correction Applied

Prakash

Kumar

Kumari

2017

Studia Geotechnica Et Mechanica

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Abstract:The effect of magnetic field dependent (MFD) viscosity on thermal convection in a horizontal ferromagnetic fluid layer has been investigated numerically. A correction is applied to Sunil et al. [24] which is very important in order to predict the correct behavior of MFD viscosity. Linear stability analysis has been carried out for stationary convection. The MFD viscosity parameter  as well as the measure of nonlinearity of magnetization M 3 , both have a stabilizing effect on the system. Numerical results are also obtained for large values of magnetic parameter M 1 and predicted graphically.

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Magnetic field effect on natural convection and entropy generation in a half-moon shaped cavity with semi-circular bottom heater having different ferrofluid inside

Cited by 52 publications

References 36 publications

CFD simulation for evaluation of optimum heat transfer rate in a heat exchanger of an internal combustion engine

CFD simulation for evaluation of optimum heat transfer rate in a heat exchanger of an internal combustion engine

Analysis of modified Fourier law in flow of ferromagnetic Powell–Eyring fluid considering two equal magnetic dipoles

Thermal Convection in a Ferromagnetic Fluid Layer with Magnetic Field Dependent Viscosity: A Correction Applied

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