A Simple and Efficient Diffuse Interface Method for Compressible Two-Phase Flows Metadata

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Title

  • Main Title A Simple and Efficient Diffuse Interface Method for Compressible Two-Phase Flows

Creator

  • Author: Berry, Ray A.
    Creator Type: Personal
  • Author: Saurel, Richard
    Creator Type: Personal
  • Author: Petitpas, Fabien
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization

Publisher

  • Name: Idaho National Laboratory
    Place of Publication: [Idaho]
    Additional Info: INL

Date

  • Creation: 2009-05-01

Language

  • English

Description

  • Content Description: In nuclear reactor safety and optimization there are key issues that rely on in-depth understanding of basic two-phase flow phenomena with heat and mass transfer. For many reasons, to be discussed, there is growing interest in the application of two-phase flow models to provide diffuse, but nevertheless resolved, simulation of interfaces between two immiscible compressible fluids – diffuse interface method (DIM). Because of its ability to dynamically create interfaces and to solve interfaces separating pure media and mixtures for DNS-like (Direct Numerical Simulation) simulations of interfacial flows, we examine the construction of a simple, robust, fast, and accurate numerical formulation for the 5-equation Kapila et al. [1] reduced two-phase model. Though apparently simple, the Kapila et al. model contains a volume fraction differential transport equation containing a nonlinear, non-conservative term which poses serious computational challenges. To circumvent the difficulties encountered with the single velocity and single pressure Kapila et al. [1] multiphase flow model, a 6-equation relaxation hyperbolic model is built to solve interface problems with compressible fluids. In this approach, pressure non-equilibrium is first restored, followed by a relaxation to an asymptotic solution which is convergent to the solutions of the Kapila et al. reduced model. The apparent complexity introduced with this extended hyperbolic model actually leads to considerable simplifications regarding numerical resolution, and the various ingredients used by this method are general enough to consider future extensions to problems involving complex physics.

Subject

  • Keyword: Relaxation
  • Keyword: Compressible Multiphase Flow
  • Keyword: Construction
  • STI Subject Categories: 22 General Studies Of Nuclear Reactors
  • Keyword: Asymptotic Solutions
  • STI Subject Categories: 42 Engineering
  • Keyword: Dim
  • Keyword: Simulation
  • Keyword: Multiphase Flow
  • Keyword: Reactor Physics
  • Keyword: Optimization
  • Keyword: Physics
  • STI Subject Categories: 97 Mathematics And Computing
  • Keyword: Reactors
  • Keyword: Resolution
  • Keyword: Mass Transfer
  • Keyword: Relaxation Methods
  • Keyword: Diffuse Interface Method
  • Keyword: Two-Phase Flow
  • Keyword: Transport
  • Keyword: Direct Numerical Simulation
  • Keyword: Dns
  • Keyword: Safety
  • Keyword: Mixtures
  • Keyword: Velocity Compressible Multiphase Flow

Source

  • Conference: 2009 International Conference on Mathematics, Computational Methods & Reactor Physics,Saratoga Springs, New York,05/03/2009,05/07/2009

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: INL/CON-08-15017
  • Grant Number: DE-AC07-99ID-13727
  • Office of Scientific & Technical Information Report Number: 950993
  • Archival Resource Key: ark:/67531/metadc929325