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Dissolution of a light gas stratification in a safety containment model: computational study using the scale-adaptive k-ω-SST model of turbulence

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.1930
pages 1891-1905

M. Gartner
Institute of Fluid Mechanics / Center of Smart Interfaces, Department of Mechanical Engineering, Technische Universitat Darmstadt, Petersenstr. 30/32, D-64287, Germany

Suad Jakirlic
Department of Mechanical Engineering Institute of Fluid Mechanics and Aerodynamics (SLA) / Center of Smart Interfaces (CSI) Technische Universitat Darmstadt Petersenstrasse 17, D-64287 Darmstadt, Germany

M. Freitag
Becker Technologies GmbH, Kolner Strasse 6, D-65760, Eschborn, Germany

Cameron Tropea
Technische Universität Darmstadt, Institute of Fluid Mechanics and Aerodynamics, Center of Smart Interfaces, International Research Training Group Darmstadt-Tokyo on Mathematical Fluid Dynamics, Germany

Sinopsis

The present work is concerned with numerical computations of the process of entrainment of a lower-density gas into a higher-density gas in the geometry of safety containment as encountered in nuclear engineering. Containment configurations differing in terms of the ratio of the buoyant to inertial forces (gradient Richardson number), molar fraction of the lower-density gas, erosion velocity and forced-convection velocity were considered. Turbulence models applied represent an eddy-resolving formulation adopted in line with the SAS (Scale-Adaptive Simulation) version of the k-ω-SST model.

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