Abstract
This article addresses the inherent heat irreversibility in the flow of a couple stress thin film along a moving vertical belt subjected to free and adiabatic surface. Mathematical analysis for the fluid-governing-equations is performed in detail. For maximum thermal performance and efficiency, the present analysis follows the second law of thermodynamics approach for the evaluation of entropy generation rate in the moving film. With this thermodynamic process, the interconnectivity between variables responsible for energy wastage is accounted for in the thermo-fluid equipment. Results of the analysis revealed the fluid properties that contribute more to energy loss and how the exergy of the system can be restored.
Highlights
The past few years have witnessed a growing interest in studies related to thin film flow along a moving belt
In the design of film evaporator, paper, coating production, etc., by a way of a short literature review on a thin film on moving belt, Siddiqui et al [1] focused on the film flow of Sisko fluid and Oldroyd 6constant fluids on the vertically moving belt
The analysis is focused on a wide belt moving steadily through a container that is filled with couple stress fluid in an upward direction
Summary
The past few years have witnessed a growing interest in studies related to thin film flow along a moving belt. This has been so due to its wide range of applications in the field of environmental sciences, chemical engineering, and physical sciences. Mahmud and Fraser [17] have done second law analysis to conserve exergy of a thermo-fluid setup. They argued that the useful energy destroyed accounts for underperformance and decreased the thermodynamic efficiency of a system.
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