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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/17788
Title: Heat transfer and flow characteristics of a rib with a slit
Authors: Tariq, Andallib
Panigrahi P.K.
Published in: Proceedings of American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Abstract: The present investigation is an experimental study of convective heat transfer in the entrance region of a rectangular channel with a single surface mounted slit rib. The open area ratios of the slit rib set during the experiment are equal to 10, 20, 30, 40 and 50%. Hotwire anemometry (HWA) and resistance thermometry (RTD) have been used for velocity and temperature measurement respectively. Both mean and turbulent statistics of the velocity and temperature fluctuations have been reported. Smoke visualization has also been carried out to obtain a qualitative picture of the flow field behind the rib. The surface Nusselt number has been determined from liquid crystal thermography (LCT). The Reynolds number based on the hydraulic diameter of the channel has been set at Re = 32,100. The nature of the flow through the slit and its interaction with the shear layer from the top of the rib depend on the size of the slit. For the slit rib with higher open area ratio (β=40 and 50%), the bottom part of the slit rib behaves like an independent small rib with its own reattachment region. At smaller open area ratio (β=10, 20 and 30%), the flow through the slit manipulates the reattaching shear layer from the top of the rib. The size of the slit and its location from the bottom channel surface are the primary parameters responsible for the modification and manipulation of the flow behavior of a slit rib in comparison to the solid rib.
Citation: Proceedings of American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, (2003), 23- 36. Washington, DC.
URI: https://doi.org/10.1115/IMECE2003-41352
http://repository.iitr.ac.in/handle/123456789/17788
Issue Date: 2003
Publisher: American Society of Mechanical Engineers (ASME)
Keywords: Flow of fluids
Flow visualization
Heat exchangers
Liquid crystals
Microelectronics
Nusselt number
Pressure drop
Reynolds number
Shear stress
Sublimation
Thermal conductivity
Hotwire anemonetry (HWA)
Resistance thermometry (RTD)
Slit rib
Heat transfer
ISSN: 2725673
Author Scopus IDs: 57119258700
35517148300
Author Affiliations: Tariq, A., Department of Mechanical Engineering, Indian Inst. of Technology Kanpur, Kanpur-208016, India
Panigrahi, P.K., Department of Mechanical Engineering, Indian Inst. of Technology Kanpur, Kanpur-208016, India
Corresponding Author: Tariq, A.; Department of Mechanical Engineering, Indian Inst. of Technology Kanpur, Kanpur-208016, India; email: atariq@iitk.ac.in
Appears in Collections:Conference Publications [ME]

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