Effect of Vortex Generator on a Wavy Wall Heat Exchanger Performance for Turbulent Nanofluid Flow under a Magnetic Field

Document Type : Research Article

Authors

1 Associate Professor Mechanical Engineering Department University of Kashan Kashan Iran

2 Heat and Fluid Flow Division, Mechanical Engineering department, University of Kashan, Kashan, Iran

Abstract

Today, in the industry for improving the performance and reducing the energy consumption of thermal systems, much attention has been paid. Use of a magnetic field, wavy wall heat exchanger and dispersion of nanoscale particles are the new methods for improving the thermal systems performance containing fluid flow and heat transfer. Flow vortex, which is formed by means of chips, or appendages such as blades or fins, is very effective in improving the heat transfer rate. In this study, the effect of magnetic field application and vortex generator on the flow field and heat transfer in compulsory displacement is investigated separately and simultaneously inside the wavy wall heat exchanger. In the present work, a wavy wall heat exchanger is simulated in various geometries of the Vertex generator under magnetic fields in various Hartmann and Reynolds numbers filled with nanofluid. The system of nonlinear governing equations is solved explicitly using a fluent software based on the basic pressure solver and finite volume method. The results show that with increasing Reynolds number, the Nusselt number and friction coefficient increase and decrease respectively. As the Hartman number increases, the Nusselt number increases and the friction coefficient decreases.

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Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 2
May 2020
Pages 493-508

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