Abstract
The second law analysis of heat transfer of a non-Newtonian, laminar fallingliquid film along an inclined heated plate is investigated. The upper surface of the liquidfilm is considered free and adiabatic. Velocity and temperature profiles are obtainedanalytically and used to compute the entropy generation number (Ns), irreversibility ratio (Φ) and the Bejan number (Be) for several values of the viscous dissipation parameter(Br -1), viscosity index (n) and the dimensionless axial distance (X). The Bejan numberincreases in the transverse direction and decreases as the viscous dissipation parameter(BrΩ -1) increases. The numerical results show that the Bejan number decreases as theviscous dissipation parameter (BrΩ -1), Peclet number (Pe) and the viscosity index (n)increase.
Highlights
The study of second law analysis of a non-Newtonian, laminar falling liquid film along an inclined heated plate has many significant applications in thermal engineering and industries
We note that the entropy generation rate decreases in the transverse direction and approaches zero asymptotically because the upper surface of the liquid film is free and adiabatic
The Bejan number increases in the transverse direction and decreases as the viscous dissipation parameter (BrΩ-1) increases
Summary
The study of second law analysis of a non-Newtonian, laminar falling liquid film along an inclined heated plate has many significant applications in thermal engineering and industries. Their results show that the entropy generation number and the irreversibility ratio decrease in the transverse direction and increases as the viscous dissipation parameter (BrΩ-1) increases.
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