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Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2019)

ISBN Druckformat: 978-1-56700-497-7 (Flash Drive)
ISBN Online: 978-1-56700-496-0

Forced Convection Heat Transfer with Convex Dimples and Cross Flow Jet

DOI: 10.1615/IHMTC-2019.620
pages 365-370

Pandaba Patro
Mechanical Engineering Department, Veer Surendra Sai University of Technology, Burla, Odisha 768018, India

Abstrakt

In the present study, computational investigation of flow characteristics and heat transfer from a small rectangular channel has been investigated. A turbulent jet impinges from a nozzle attached to the top wall of the rectangular channel and at the entrance of the rectangular channel, turbulent uniform flow took place. The bottom plate is heated and convex dimples are attached for heat transfer enhancement. Finite volume method with SST k − ω turbulence model was used for the numerical simulations. The duct Reynolds number (at the inlet) has been varied in the range of 10000 − 50000 and Reynolds number at the nozzle has been varied in the range of 6000 − 12000, respectively. It has been shown that the heat transfer rate in the presence of cross-flow is found to be much higher than that without cross-flow. Also, presence of convex dimples augments heat transfer than a plane surface.