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

The current study is an attempt to analytically characterize the second law analysis and mixed convective rheology of the (Al2O3–Ag/H2O) hybrid nanofluid flow influenced by magnetic induction effects towards a stretching sheet. Viscous dissipation and internal heat generation effects are encountered in the analysis as well. The mathematical model of partial differential equations is fabricated by employing boundary-layer approximation. The transformed system of nonlinear ordinary differential equations is solved using the homotopy analysis method. The entropy generation number is formulated in terms of fluid friction, heat transfer and Joule heating. The effects of dimensionless parameters on flow variables and entropy generation number are examined using graphs and tables. Further, the convergence of HAM solutions is examined in terms of defined physical quantities up to 20th iterations, and confirmed. It is observed that large λ1 upgrades velocity, entropy generation and heat transfer rate, and drops the temperature. High values of δ enlarge velocity and temperature while reducing heat transport and entropy generation number. Viscous dissipation strongly influences an increase in flow and heat transfer rate caused by a no-slip condition on the sheet.

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Second-law analysis of fluid flow over an isothermal moving wedge

Alexandria Engineering Journal ◽

10.1016/j.aej.2013.11.011 ◽

2014 ◽

Vol 53 (1) ◽

pp. 1-9 ◽

Cited By ~ 17

Author(s):

F. Hedayati ◽

A. Malvandi ◽

D.D. Ganji

Keyword(s):

Fluid Flow ◽

Second Law ◽

Second Law Analysis ◽

Moving Wedge

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First and second law analysis of fully developed gaseous slip flow in trapezoidal silicon microchannels considering viscous dissipation effect

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2010.09.064 ◽

2011 ◽

Vol 54 (1-3) ◽

pp. 52-64 ◽

Cited By ~ 16

Author(s):

Lütfullah Kuddusi

Keyword(s):

Viscous Dissipation ◽

Slip Flow ◽

Second Law ◽

Dissipation Effect ◽

Second Law Analysis ◽

Gaseous Slip Flow

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Second Law Analysis of Magneto-Micropolar Fluid Flow Between Parallel Porous Plates

Journal of Thermal Science and Engineering Applications ◽

10.1115/1.4039633 ◽

2018 ◽

Vol 10 (4) ◽

Cited By ~ 1

Author(s):

Abbas Kosarineia ◽

Sajad Sharhani

Keyword(s):

Magnetic Field ◽

Reynolds Number ◽

Fluid Flow ◽

Entropy Generation ◽

Hartmann Number ◽

Second Law ◽

Brinkman Number ◽

Viscosity Parameter ◽

Micropolar Fluid Flow ◽

Second Law Analysis

In this study, the influence of the applied magnetic field is investigated for magneto-micropolar fluid flow through an inclined channel of parallel porous plates with constant pressure gradient. The lower plate is maintained at constant temperature and the upper plate at a constant heat flux. The governing motion and energy equations are coupled while the effect of the applied magnetic field is taken into account, adding complexity to the already highly correlated set of differential equations. The governing equations are solved numerically by explicit Runge–Kutta. The velocity, microrotation, and temperature results are used to evaluate second law analysis. The effects of characteristic and dominate parameters such as Brinkman number, Hartmann Number, Reynolds number, and micropolar viscosity parameter are discussed on velocity, temperature, microrotation, entropy generation, and Bejan number in different diagrams. The results depicted that the entropy generation number rises with the increase in Brinkman number and decays with the increase in Hartmann Number, Reynolds number, and micropolar viscosity parameter. The application of the magnetic field induces resistive force acting in the opposite direction of the flow, thus causing its deceleration. Moreover, the presence of magnetic field tends to increase the contribution of fluid friction entropy generation to the overall entropy generation; in other words, the irreversibilities caused by heat transfer reduced. Therefore, to minimize entropy, Brinkman number and Hartmann Number need to be controlled.

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