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Drag coefficients for rotating expendable bathythermographs and the impact of launch parameters on depth predictions

TitleDrag coefficients for rotating expendable bathythermographs and the impact of launch parameters on depth predictions
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2012
AuthorsAbraham, J.P., Gorman J.M., Reseghetti Franco, Sparrow E.M., and Minkowycz W.J.
JournalNumerical Heat Transfer; Part A: Applications
Volume62
Pagination25-43
ISSN10407782
KeywordsCalibration, Climate change, Computational fluid dynamics, Computational fluid dynamics technique, Depth information, drag coefficient, Drop height, Dynamic models, Expendable bathythermographs, Experimental calibration, Model fluids, Ocean temperature, Ocean water, Oceanographic probe, Oceanographic temperature, Oceanography, Probes, Time of flight
Abstract

Computational fluid dynamics techniques have been applied to model fluid flow in the vicinity of oceanographic temperature probes. A major goal of the modeling effort is the determination of drag coefficients for probe descent into ocean water. These drag coefficients can be used, in conjunction with a dynamic model of the probe, to predict the depth of the probe during descent. Accurate depth information is essential for the proper measurement of ocean temperatures and, consequently, ocean heating associated with climate change. Until recently, probe depths were predicted with the use of experimental calibrations which relate time-of-flight and depth. Those calibrations are limited in their accuracy, they are confined to conditions that match the experiments from which the calibrations were determined, and they are unable to account for variations in quantities such as the drop height or initial probe mass. The dynamic model and drag coefficient calculations presented here are, to the best knowledge of the authors, the first to include the impact of probe rotation. It is hoped that this new technique can be applied to the archive of oceanographic probe measurements and that improvements to ocean temperature monitoring will result. © 2012 Taylor and Francis Group, LLC.

Notes

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84863624981&doi=10.1080%2f10407782.2012.672898&partnerID=40&md5=dd40c456cd17026f7684004c12314c09
DOI10.1080/10407782.2012.672898
Citation KeyAbraham201225