When the flow in a minichannel passes around a bend, secondary flows can develop which can affect the flow, pressure drop and heat transfer rate in the bend and in the flow upstream and downstream of the bend. In order to investigate these effects in more detail attention has been given to flow in a simple minichannel system in which the flow enters the system with a uniform velocity and temperature and passes through a straight channel that has a length that is 10 times the size of the channel. The flow then passes around a rounded 180° bend. Following the bend, the flow passes down another straight channel which also has a length of 10 times the size of the channel. A uniform heat flux is applied over the entire surface of the channel. The channel has a trapezoidal cross-sectional shape. It has been assumed that the flow is steady and incompressible and that there is no slip at the channel walls. The governing equations have been written in dimensionless form and solved using a commercial finite-element based software package, FIDAP. The solution has the following parameters: the Reynolds number, the Prandtl number, the dimensionless radius of the bend and the ratio of the bottom-to-top widths of the channel. Results will only be presented for a Prandtl number 0.7 for Reynolds numbers of between 10 and 500 for various dimensionless bend radii and various bottom-to-top channel width ratios. The major concern in this work is with the extent of the influence of the secondary flow on the flow in the straight channel sections upstream and downstream of the bend. The effect of the channel shape and of the dimensionless channel corner radius on the pressure distributions and on the dimensionless wall temperature distributions, in the straight channel sections in particular, have been considered.
Skip Nav Destination
ASME 2007 5th International Conference on Nanochannels, Microchannels, and Minichannels
June 18–20, 2007
Puebla, Mexico
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4272-X
PROCEEDINGS PAPER
Secondary Flow Effects in a Trapizoidal Minichannel Flow System Involving Two Straight Sections Separated by a 180° Bend
Patrick H. Oosthuizen
Patrick H. Oosthuizen
Queen’s University, Kingston, ON, Canada
Search for other works by this author on:
Patrick H. Oosthuizen
Queen’s University, Kingston, ON, Canada
Paper No:
ICNMM2007-30072, pp. 409-417; 9 pages
Published Online:
May 28, 2009
Citation
Oosthuizen, PH. "Secondary Flow Effects in a Trapizoidal Minichannel Flow System Involving Two Straight Sections Separated by a 180° Bend." Proceedings of the ASME 2007 5th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 5th International Conference on Nanochannels, Microchannels, and Minichannels. Puebla, Mexico. June 18–20, 2007. pp. 409-417. ASME. https://doi.org/10.1115/ICNMM2007-30072
Download citation file:
7
Views
Related Proceedings Papers
Related Articles
The Effect of Single-Sided Ribs on Heat Transfer and Pressure Drop Within a Trailing Edge Internal Channel of a Gas Turbine Blade
J. Thermal Sci. Eng. Appl (August,2022)
Sub-Channel Analysis of a Hexagonal Sub-Assembly: Influence of Blockage and Axial Power Distribution on Critical Heat Flux
J. Thermal Sci. Eng. Appl (December,2021)
Fully Developed Flow and Heat Transfer in Ducts Having Streamwise-Periodic Variations of Cross-Sectional Area
J. Heat Transfer (May,1977)
Related Chapters
The Path through and out of a Conflict
Conflict Resolution: Concepts and Practice (The Technical Manager's Survival Guides)
Openings
Guidebook for the Design of ASME Section VIII Pressure Vessels
Performance Testing of Combined Cycle Power Plant
Handbook for Cogeneration and Combined Cycle Power Plants, Second Edition