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Effect of natural convection on oscillating flow in a pipe with cryogenic temperature difference across the ends
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Rajan, Ashwin T., Narasimham, G. S. V. L. and Jacob, Subhash (2012) Effect of natural convection on oscillating flow in a pipe with cryogenic temperature difference across the ends. International Journal of Heat and Mass Transfer, 55 (4). pp. 680-694. doi:10.1016/j.ijheatmasstransfer.2011.10.042 ISSN 0017-9310.
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WRAP-effect-natural-convection-oscillating-flow-pipe-2012.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (5Mb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.ijheatmasstransfer.201...
Abstract
The effect of natural convection on the oscillatory flow in an open-ended pipe driven by a timewise sinusoidally varying pressure at one end and subjected to an ambient-to-cryogenic temperature difference across the ends, is numerically studied. Conjugate effects arising out of the interaction of oscillatory flow with heat conduction in the pipe wall are taken into account by considering a finite thickness wall with an insulated exterior surface. Two cases, namely, one with natural convection acting downwards and the other, with natural convection acting upwards, are considered. The full set of compressible flow equations with axissymmetry are solved using a pressure correction algorithm. Parametric studies are conducted with frequencies in the range 5–15 Hz for an end-to-end temperature difference of 200 and 50 K. Results are obtained for the variation of velocity, temperature, Nusselt number and the phase relationship between mass flow rate and temperature. It is found that the Rayleigh number has a minimal effect on the time averaged Nusselt number and phase angle. However, it does influence the local variation of velocity and Nusselt number over one cycle. The natural convection and pressure amplitude have influence on the energy flow through the gas and solid.
Item Type: | Journal Article | ||||||||||
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Subjects: | Q Science > QC Physics T Technology > TP Chemical technology |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||
Library of Congress Subject Headings (LCSH): | Heat -- Convection, Natural, Refrigeration and refrigerating machinery, Rayleigh number, Nusselt number, Heat equation | ||||||||||
Journal or Publication Title: | International Journal of Heat and Mass Transfer | ||||||||||
Publisher: | Pergamon-Elsevier Science Ltd. | ||||||||||
ISSN: | 0017-9310 | ||||||||||
Official Date: | 2012 | ||||||||||
Dates: |
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Volume: | 55 | ||||||||||
Number: | 4 | ||||||||||
Number of Pages: | 15 | ||||||||||
Page Range: | pp. 680-694 | ||||||||||
DOI: | 10.1016/j.ijheatmasstransfer.2011.10.042 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||
Date of first compliant deposit: | 6 September 2016 | ||||||||||
Date of first compliant Open Access: | 6 September 2016 |
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