The effect of an external magnetic field on the entropy generation in three-dimensional natural convection

Kolsi, Lioua; Abidi, Awatef; Borjini, Naceur; Aissia, Ben

doi:10.2298/tsci1002341k

Cited by 32 publications

(15 citation statements)

References 20 publications

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“…In a recent study, Bahrami and Gandjalikhan Nassab [15] analyzed the convection flow over forward facing step in a duct to investigate the amount of entropy generation in this type of flow. In the other different study, a 3-D original numerical study of entropy generation in the case of liquid metal laminar natural convection in a differentially heated cubic cavity and in the presence of an external magnetic field orthogonal to the isothermal walls was carried out by Kolsi et al [16]. The effect of this field on the various types of irreversibilities was analyzed in that work.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of entropy generation in laminar forced convection flow over inclined backward and forward facing steps in a duct under bleeding condition

2014

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A numerical investigation of entropy generation in laminar forced convection of gas flow over a recess including two inclined backward and forward facing steps in a horizontal duct under bleeding condition is presented. For calculation of entropy generation from the second law of thermodynamics in a forced convection flow, the velocity and temperature distributions are primary needed. For this purpose, the 2-D Cartesian co-ordinate system is used to solve the governing equations which are conservations of mass, momentum, and energy. These equations are solved numerically using the computational fluid dynamic techniques to obtain the temperature and velocity fields, while the blocked region method is employed to simulate the inclined surface. Discretized forms of these equations are obtained by the finite volume method and solved using the SIMPLE algorithm. The numerical results are presented graphically and the effects of bleeding coefficient and recess length as the main parameters on the distributions of entropy generation number and Bejan number are investigated. Also, the effect of Reynolds number and bleeding coefficient on total entropy generation which shows the amount of flow irreversibilities is presented for two recess length. The use of present results in the design process of such thermal system would help the system attain the high performance during exploitation. Comparison of numerical results with the available data published in open literature shows a good consistency.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of entropy generation in laminar forced convection flow over inclined backward and forward facing steps in a duct under bleeding condition

2014

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“…A numerical study of mixed convection and entropy generation in Poiseulle-Benard channel in different angles has been presented [2]. A numerical study of entropy generation using 3D in the case of liquid metal laminar natural convection in a differentially heated cubic cavity and in the presence of an external magnetic field orthogonal to the isothermal walls has been carried out [3]. A numerical analysis has been presented to study laminar-forced convection and entropy generation in a helical coil with constant wall heat flux [4] where optimal Reynolds numbers were found to be related to the wall heat flux.…”

Section: Introductionmentioning

confidence: 99%

Parametric Study of Entropy Generation in a Fluid with Internal Heat Generation between Two Rotating Cylinders Subjected to Convective Cooling at the Surface

Assad

Öztop

2012

ISRN Chemical Engineering

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Entropy generation analysis of a steady fluid flow with internal heat generation between two rotating cylinders was presented. The surface of the inner cylinder was kept at constant temperature while the surface of the outer cylinder was exposed to convection cooling. Analytical expressions for velocity and temperature distributions within the fluid were obtained. The effects of velocity ratio, Biot number, Brinkman number and other dimensionless parameters on the temperature distribution and local and total entropy generation rates were investigated and the results were presented graphically.

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“…In the presence of a magnetic field the generated entropy is written in the following form Kolsi et al [37] as…”

Section: Hot Wallmentioning

confidence: 99%

Control of natural convection via inclined plate of CNT-water nanofluid in an open sided cubical enclosure under magnetic field

Kolsi

Al‐Rashed

Al‐Salem

et al. 2017

International Journal of Heat and Mass Transfer

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The effect of an external magnetic field on the entropy generation in three-dimensional natural convection

Cited by 32 publications

References 20 publications

Numerical investigation of entropy generation in laminar forced convection flow over inclined backward and forward facing steps in a duct under bleeding condition

Numerical investigation of entropy generation in laminar forced convection flow over inclined backward and forward facing steps in a duct under bleeding condition

Parametric Study of Entropy Generation in a Fluid with Internal Heat Generation between Two Rotating Cylinders Subjected to Convective Cooling at the Surface

Control of natural convection via inclined plate of CNT-water nanofluid in an open sided cubical enclosure under magnetic field

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