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Title: Direct Numerical Simulation of Boiling Multiphase Flows: State-of-the-Art, Modeling, Algorithmic and Computer Needs

The state-of-the-art for Direct Numerical Simulation (DNS) of boiling multiphase flows is reviewed, focussing on potential of available computational techniques, the level of current success for their applications to model several basic flow regimes (film, pool-nucleate and wall-nucleate boiling -- FB, PNB and WNB, respectively). Then, we discuss multiphysics and multiscale nature of practical boiling flows in LWR reactors, requiring high-fidelity treatment of interfacial dynamics, phase-change, hydrodynamics, compressibility, heat transfer, and non-equilibrium thermodynamics and chemistry of liquid/vapor and fluid/solid-wall interfaces. Finally, we outline the framework for the {\sf Fervent} code, being developed at INL for DNS of reactor-relevant boiling multiphase flows, with the purpose of gaining insight into the physics of multiphase flow regimes, and generating a basis for effective-field modeling in terms of its formulation and closure laws.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
911955
Report Number(s):
INL/CON-07-12389
TRN: US200801%%401
DOE Contract Number:
DE-AC07-99ID-13727
Resource Type:
Conference
Resource Relation:
Conference: Joint International topical meeting on Mathematics & Computation and Supercomputing in Nuclear Appli,Monterey California,04/15/2007,04/19/2007
Research Org:
Idaho National Laboratory (INL)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
99 - GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; BOILING; CHEMISTRY; CLOSURES; COMPRESSIBILITY; COMPUTERS; FOCUSING; HEAT TRANSFER; HYDRODYNAMICS; MULTIPHASE FLOW; PHYSICS; SIMULATION; THERMODYNAMICS Boiling multiphase flows; Direct Numerical Simulation; Interface Tracking; Two-fluid model