A Numerical Study of Entropy Generation in the Entrance Region of Curved Pipes

In this study, developing incompressible viscous flow and heat transfer in curved pipes are studied numerically considering a constant heat flux at the wall to analyze the entropy generation. The governing equations including continuity, momentum and energy equations are solved using a second order...

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Bibliographic Details
Published in:Heat transfer engineering 2010-12, Vol.31 (14), p.1203-1212
Main Authors: Amani, E., Nobari, M. R. H.
Format: Article
Language:English
Subjects:
Algorithms
Applied sciences
Computational fluid dynamics
Curved
Energy
Energy. Thermal use of fuels
Entrances
Entropy
Exact sciences and technology
Flows in ducts, channels, nozzles, and conduits
Fluid dynamics
Fluid flow
Fundamental areas of phenomenology (including applications)
Heat transfer
Hydrodynamic stability
Mathematical analysis
Mathematical models
Optimization
Physics
Pipes
Reynolds number
Secondary instability
Studies
Theoretical studies. Data and constants. Metering
Thermodynamics
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Summary:In this study, developing incompressible viscous flow and heat transfer in curved pipes are studied numerically considering a constant heat flux at the wall to analyze the entropy generation. The governing equations including continuity, momentum and energy equations are solved using a second order finite difference method based on the projection algorithm. Entropy generation and thermodynamic optimization are investigated through the entrance region of the curved pipes with circular cross section by a general non-dimensional analysis both numerically and analytically. Optimal Reynolds number calculation based on the entropy generation minimization are carried out for two cases considering the two groups of non-dimensional parameters. The comparison of the numerical results in the entrance region with the analytical ones in the fully developed region indicates that both solutions predict nearly the same optimal Reynolds numbers.
ISSN:0145-7632
1521-0537
DOI:10.1080/01457631003732995