Thermodynamics second law analysis for MHD boundary layer flow and heat transfer caused by a moving wedge
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An analytical analysis has been carried out to investigate the second law of thermodynamics in magnetohydrodynamic (MHD) boundary layer flow and heat transfer by moving wedge. The governing PDEs of momentum, energy, and entropy generation are converted into nonlinear ODEs via similarity variables and then solved analytically using the optimal homotopy asymptotic method. The expression of entropy generation number is obtained in dimensionless form. Results revealed that the minimum entropy production is achieved when the wedge moves in the opposite direction to the free stream (for the negative values of velocity ratio parameter λ). Moreover, the magnetic field influences the increase in entropy production.
KeywordsEntropy generation Moving wedge Magnetohydrodynamic (MHD) flow Optimal homotopy asymptotic method (OHAM)
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