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.
Skip Nav Destination
ASME 2003 International Mechanical Engineering Congress and Exposition
November 15–21, 2003
Washington, DC, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-3718-1
PROCEEDINGS PAPER
Heat Transfer and Flow Characteristics of a Rib With a Slit
Andallib Tariq,
Andallib Tariq
Indian Institute of Technology, Kanpur, India
Search for other works by this author on:
P. K. Panigrahi
P. K. Panigrahi
Indian Institute of Technology, Kanpur, India
Search for other works by this author on:
Andallib Tariq
Indian Institute of Technology, Kanpur, India
P. K. Panigrahi
Indian Institute of Technology, Kanpur, India
Paper No:
IMECE2003-41352, pp. 23-36; 14 pages
Published Online:
May 12, 2008
Citation
Tariq, A, & Panigrahi, PK. "Heat Transfer and Flow Characteristics of a Rib With a Slit." Proceedings of the ASME 2003 International Mechanical Engineering Congress and Exposition. Heat Transfer, Volume 2. Washington, DC, USA. November 15–21, 2003. pp. 23-36. ASME. https://doi.org/10.1115/IMECE2003-41352
Download citation file:
13
Views
Related Proceedings Papers
Related Articles
Three-Dimensional Visualization and Measurement of Temperature Field Using Liquid Crystal Scanning Thermography
J. Heat Transfer (October,2001)
Convective Heat Transfer in Vertical Asymmetrically Heated Narrow Channels
J. Heat Transfer (December,2002)
Related Chapters
Cavitating Structures at Inception in Turbulent Shear Flow
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Extended Surfaces
Thermal Management of Microelectronic Equipment
Extended Surfaces
Thermal Management of Microelectronic Equipment, Second Edition