Reference : Studies on convective cooling of cryogenic fluids towards superconducting applications
Scientific journals : Article
Engineering, computing & technology : Multidisciplinary, general & others
http://hdl.handle.net/2268/217714
Studies on convective cooling of cryogenic fluids towards superconducting applications
English
Satpathy, Kamalakanta [Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes >]
Dubois, Charles [Université de Liège - ULiège > Département de Physique > Optofluidique > >]
Duchesne, Alexis [Université de Liège - ULiège > Département de Physique > Optofluidique > >]
Fagnard, Jean-François [Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > > >]
Caps, Hervé [Université de Liège - ULiège > Département de physique > Optofluidique >]
Vanderbemden, Philippe [Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques >]
Vanderheyden, Benoît mailto [Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes >]
20-Sep-2017
WIT Transactions on Engineering Sciences
118
95-106
Yes
International
[en] Computational Fluid Dynamics ; Rayleigh Number ; average Nusselt Number ; aspect ratio
[en] To understand the cooling aspect through natural convection in a cryogenic fluid interacting with a constant heat source, numerical simulations are carried out in a parallelepiped enclosure. The 3D form of N-S equations is solved to obtain the detailed flow features through path line profiles, isotherm contours and velocity vectors. The effect of heater aspect ratio (x/L) on the rate of heat transfer is studied in terms of the average Nusselt number (Nuave). The results indicate that effective heat transfer enhancement occurs for a small heater length, resulting in an efficient cooling. Increasing the heater length will favor heat transfer through conduction over convection. The maximum temperature difference across the fluid and the velocity magnitude are found to decrease with heater length. 3D and 2D results are in agreement for short heater lengths, but vary for higher heater lengths, presumably due to the essential effect of the heater width. Further analysis on different types of coolant reveals a constant correlation between Nuave and the Rayleigh number (Ra), with Nuave ~ Ra^0.374. Benchmark validation for natural convection in a square enclosure is found to be satisfactory against the reported results.
CfB Communauté Française de Belgique
ARC 11/16-03
http://hdl.handle.net/2268/217714
10.2495/CMEM170101
https://www.witpress.com/elibrary/wit-transactions-on-engineering-sciences/118/36222
Copyright WIT Press
Proceedings of the CMEM 2017 Conference, 18th International Conference on Computational Methods and Experimental Measurements, 4 - 6 July, 2017, Alicante, Spain

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