The concept of applying a periodic pulse to a fluid flow has been widely used in industrial applications for many years. One would expect flow pulsation to have a significantly positive effect on the efficiency of heat transfer. However, several decades of research into this type of flow (mainly for a gas such as air flowing in a pipe) has brought conflicting conclusions as to the advantages or disadvantages of pulsation on heat transfer. In order to study the published evidence in a more objective manner, this research project was initiated. The approach used was experimental, involving laboratory experiments with water flowing in a heated horizontal pipe. For this purpose, a special experimental apparatus was designed and built, and a large number of experiments were performed for different values of pulsation frequency and amplitude, superimposed over a varying main flow rate through the pipe. For the range of variables considered in this study (ie, 5,000 < Re < 23,000, 0.1 Hz ≤ f ≤ 1.0 Hz and various pulsation amplitudes), it was found that (a) increasing pulsation frequency improved the heat transfer by as much as 15%, (b) increasing pulsation amplitude reduced the heat transfer by as much as 25% and (c) up to 50% heat transfer enhancement was obtained for pulsatile flows with flow reversal.
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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 Enhancement in an Electrically Heated Horizontal Pipe Due to Flow Pulsation
Mir-Akbar Hessami,
Mir-Akbar Hessami
Monash University, Melbourne, Australia
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Andrew Berryman,
Andrew Berryman
Monash University, Melbourne, Australia
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Pratish Bandopdhayay
Pratish Bandopdhayay
CSIRO, Melbourne, Australia
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Mir-Akbar Hessami
Monash University, Melbourne, Australia
Andrew Berryman
Monash University, Melbourne, Australia
Pratish Bandopdhayay
CSIRO, Melbourne, Australia
Paper No:
IMECE2003-55146, pp. 49-56; 8 pages
Published Online:
May 12, 2008
Citation
Hessami, M, Berryman, A, & Bandopdhayay, P. "Heat Transfer Enhancement in an Electrically Heated Horizontal Pipe Due to Flow Pulsation." Proceedings of the ASME 2003 International Mechanical Engineering Congress and Exposition. Heat Transfer, Volume 3. Washington, DC, USA. November 15–21, 2003. pp. 49-56. ASME. https://doi.org/10.1115/IMECE2003-55146
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