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Flow structures and heat transfer characteristics in arrays of submerged laminar impinging jets
Author(s) -
Rohlfs W.,
Bieber M.,
Ehrenpreis C.,
Jörg J.,
Sabelberg E.,
Kneer R.
Publication year - 2016
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201610456
Subject(s) - laminar flow , jet (fluid) , dimensionless quantity , mechanics , heat transfer , planar , vortex , heat transfer coefficient , reynolds number , heat transfer enhancement , scaling , flow (mathematics) , physics , turbulence , geometry , computer graphics (images) , mathematics , computer science
This study summarizes the scaling behavior of single laminar submerged jets with circular and planar cross sections. Unified correlations for the stagnation zone heat transfer of both configurations, based on the dominant dimensionless numbers, are presented. In technical applications, impinging jets are often applied in jet array configurations. Compared to single jet impingement, jet‐to‐jet interaction can have a substantial influence on local heat transfer. A distinct pattern of the heat transfer coefficient was observed experimentally. Numerical simulations revealed two counter‐rotating vortices in the interaction zone between two jets to be the causing mechanism of this pattern. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)