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LES OF TURBULENT THERMAL MIXING IN CIRCULAR AND SQUARE T-JUNCTION CONFIGURATIONS

DOI: 10.1615/ICHMT.2012.CHT-12.1040
pages 1729-1739

D. Caviezel
ASCOMP GmbH, Technoparkstrasse 1, CH-8005 Zurich, Switzerland

M. Labois
ASCOMP GmbH, Zurich Switzerland

D. Lakehal
ASCOMP GmbH, Technoparkstrasse 1, CH-8005 Zurich, Switzerland

Аннотация

Large Eddy Simulation (LES) results of thermal mixing in both circular and square T-junction configurations at high Reynolds number (~105) are reported in this work. The circular configuration was studied at the Alvkarleby Laboratory, Vattenfall R&D. The test rig consists of a horizontal pipe for the cold water flow and a vertically oriented pipe for the hot water flow. The square T-junction configuration with different channel sizes was studied experimentally at the Department of Mechanical Engineering of Mie University, Japan. The Vattenfall case was selected as a benchmark by OECD held in Washington DC in 2010; the second case was selected as a benchmark for thermal mixing in the ERCOFTAC Workshop held in EDF Chatou, France, 2011. Large-Eddy and URANS simulations were performed with the code TransAT©. The comparison shows excellent agreement between LES and the data.

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