Two-phase flows in u-bends

Da Silva Lima, Ricardo J. (Laboratoire de transfert de chaleur et de masse, EPFL, Lausanne, Switzerland) ; Thome, John M. (Laboratoire de transfert de chaleur et de masse, EPFL, Lausanne, Switzerland)

In this chapter, the flow patterns and pressure drops characterizing two-phase flows in U-bends are presented and discussed. These are illustrated by flow pattern visualizations and experimental pressure drops obtained with R134a flowing inside a test section with a 13.4mm internal diameter tube at two saturation temperatures (5 and 10°), three mass fluxes (150, 300, and 500 kgs−1 m−2) for three flow orientations (vertical downflow, horizontal flow, and vertical upflow). The experimental frictional pressure drop database obtained is presented and compared to the predictions of a newmulti-orientation flowpattern based U-bend frictional pressure drop model…


Note: DA SILVA LIMA, Ricardo J. est chercheur à la HES-SO, HEPIA, depuis 2013.


Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEPIA - Genève
Institute:
inPACT - Institut du Paysage, d'Architecture, de la Construction et du Territoire
Date:
2015-06
Published in:
Encyclopedia of Two-Phase Heat Transfer and Flow II
Numeration (vol. no.):
2020, vol. 2, pp. 141-182
DOI:
ISBN:
978-981-4623-31-5
Appears in Collection:



 Record created 2020-08-11, last modified 2020-10-27


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