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ISSN Online: 2688-7231

ISBN Online: 978-1-56700-524-0

Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
December, 17-20, 2021, IIT Madras, Chennai, India

Three-dimensional heat transfer and fluid flow analysis of Double forward-facing stepped channel with obstacles

Get access DOI: 10.1615/IHMTC-2021.3010
pages 1989-1994

Abstract

The flow separation and subsequent reattachment induced by flow velocities and physical models under consideration can be found in many practical engineering applications. This phenomenon has a crucial influence on heat transfer mechanism and has harmful effects like uneven heat loading in thermal equipment. This type of flow phenomenon is encountered in electronic cooling applications, nuclear reactors, gas turbine blades, chemical process equipment, combustion chambers, heat exchangers with high performance, open channels, building aerodynamics, and many other energy system equipments. In this study, fluid flow and heat transfer characteristics in a double forward-facing stepped channel is analyzed for different values of Reynolds number (Re = 300, 500, 800, 1000), and axis ratio of obstacles (0.25,0.50, 0.75, 1.0). Further, the effect of various design parameters such as Reynolds number and axis ratio of obstacles (positioned before steps) has been investigated. The results for fluid flow pattern, temperature distribution are presented and discussed. The reduction in recirculation region length due to the presence of obstacles near the steps is observed.
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