Second-law analysis of laminar fluid flow in a heated channel with hydromagnetic and viscous dissipation effects

Aïboud-Saouli, Soraya; Settou, Noureddine; Saouli, Salah; Meza, N.

doi:10.1016/j.apenergy.2006.07.007

Cited by 23 publications

(11 citation statements)

References 10 publications

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“…At the same time, industries have been involved in using nanofluids for the enhancement of thermal conductivity, employing different procedures to adjust and characterize the thermophysical properties of nanofluids (e.g., viscosity, thermal conductivity, specific heat capacity and density) [ 17 ]. Nanofluids are used for heat transportation in industries which feature hyperthermia, power generation, air conditioning, ventilation, microfabrication and transportation [ 18 , 19 , 20 , 21 ]. More specifically, they are used in the cooling and heating systems employed in solar energy.…”

Section: Introductionmentioning

confidence: 99%

Entropy Generation and Heat Transfer in Drilling Nanoliquids with Clay Nanoparticles

Nisar

Khan

et al. 2019

Entropy

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Different types of nanomaterials are used these days. Among them, clay nanoparticles are the one of the most applicable and affordable options. Specifically, clay nanoparticles have numerous applications in the field of medical science for cleaning blood, water, etc. Based on this motivation, this article aimed to study entropy generation in different drilling nanoliquids with clay nanoparticles. Entropy generation and natural convection usually occur during the drilling process of oil and gas from rocks and land, wherein clay nanoparticles may be included in the drilling fluids. In this work, water, engine oil and kerosene oil were taken as base fluids. A comparative analysis was completed for these three types of base fluid, each containing clay nanoparticles. Numerical values of viscosity and effective thermal conductivity were computed for the nanofluids based on the Maxwell–Garnett (MG) and Brinkman models. The closed-form solution of the formulated problem (in terms of partial differential equations with defined initial and boundary conditions) was determined using the Laplace transform technique. Numerical facts for temperature and velocity fields were used to calculate the Bejan number and local entropy generation. These solutions are uncommon in the literature and therefore this work can assist in the exact solutions of a number of problems of technical relevance to this type. Herein, the effect of different parameters on entropy generation and Bejan number minimization and maximization are displayed through graphs.

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Section: Introductionmentioning

confidence: 99%

Entropy Generation and Heat Transfer in Drilling Nanoliquids with Clay Nanoparticles

Nisar

Khan

et al. 2019

Entropy

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“…Entropy generation due to the thermodynamic irreversibility results from heat transfer processes and viscous dissipation (18) (19) . It has been studied by Saouli and Aı¨boud-Saouli (20) in a falling liquid film along an inclined heated plate, Mahmud et al (21) for mixed convection in a channel, and Aı¨boud-Saouli et al (22) (23) in a falling film considering the magnetic field and viscous dissipation effects. In the present study, entropy generation in mixed convection MHD flow of a nanofluid along a non-linear stretching sheet with the presence of viscous dissipation and variable magnetic field is investigated.…”

Section: Introductionmentioning

confidence: 99%

Entropy Analysis in Mixed Convection MHD flow of Nanofluid over a Non-linear Stretching Sheet

Matin

Nobari

Jahangiri

2012

JTST

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This article deals with a numerical study of entropy analysis in mixed convection MHD flow of nanofluid over a non-linear stretching sheet taking into account the effects of viscous dissipation and variable magnetic field. The nanofluid is made of such nano particles as SiO 2 with pure water as a base fluid. To analyze the problem, at first the boundary layer equations are transformed into non-linear ordinary equations using a similarity transformation. The resultant equations are then solved numerically using the Keller-Box scheme based on the implicit finite-difference method. The effects of different non-dimensional governing parameters such as magnetic parameter, nanoparticles volume fraction, Nusselt, Richardson, Eckert, Hartman, Brinkman, Reynolds and entropy generation numbers are investigated in details. The results indicate that increasing the nano particles to the base fluids causes the reduction in shear forces and a decrease in stretching sheet heat transfer coefficient. Also, decreasing the magnetic parameter and increasing the Eckert number result in improves heat transfer rate. Furthermore, the surface acts as a strong source of irreversibility due to the higher entropy generation number near the surface.

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“…In a more recent study, Mahmud et al [35,36] applied the second law analysis to fundamental convective heat transfer problems for non-Newtonian fluid through a channel between two parallel plates. Aïboud-Saouli et al [37] investigated entropy generation in a laminar, conducting liquid flow inside a channel made of two parallel heated plates under the action of transverse magnetic field. They also examined the effect of viscouse dissipation on velocity, temperature and entropy generation.…”

Section: Introductionmentioning

confidence: 99%

Effect of discrete heater at the vertical wall of the cavity over the heat transfer and entropy generation using LBM

Delavar¹,

Farhadi²,

Sedighi³

2011

THERM SCI

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In this paper lattice Boltzmann method was employed for investigation the effect of the heater location on flow pattern, heat transfer and entropy generation in a cavity. A 2-D thermal lattice Boltzmann model with 9 velocities, D2Q9, is used to solve the thermal flow problem. The simulations were performed for Rayleigh numbers from 10 3 to 10 6 at Pr = 0.71. The study was carried out for heater length of 0.4 side wall length which is located at the right side wall. Results are presented in the form of streamlines, temperature contours, Nusselt number, and entropy generation curves. Results show that the location of heater has a great effect on the flow pattern and temperature fields in the enclosure and subsequently on entropy generation. The dimensionless entropy generation decreases at high Rayleigh number for all heater positions. The ratio of averaged Nusselt number and dimensionless entropy generation for heater located on vertical and horizontal walls was calculated. Results show that higher heat transfer was observed from the cold walls when the heater located on vertical wall. On the other hand, heat transfer increases from the heater surface when it is located on the horizontal wall.

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Second-law analysis of laminar fluid flow in a heated channel with hydromagnetic and viscous dissipation effects

Cited by 23 publications

References 10 publications

Entropy Generation and Heat Transfer in Drilling Nanoliquids with Clay Nanoparticles

Entropy Generation and Heat Transfer in Drilling Nanoliquids with Clay Nanoparticles

Entropy Analysis in Mixed Convection MHD flow of Nanofluid over a Non-linear Stretching Sheet

Effect of discrete heater at the vertical wall of the cavity over the heat transfer and entropy generation using LBM

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