A Lagrangian-Eulerian Approach to Modeling Homogeneous Condensation in High Density Flows (POSTPRINT)

Abstract

A computational approach to homogeneous nucleation is proposed, based on Eulerian description of the gas phase coupled with a Lagrangian approach to the cluster phase. A continuum, Euler / Navier-Stokes solver VAC is used to model the gas transport, and a kinetic particle solver is developed in this work to simulate cluster nucleation and growth. Parameters in the new model were adjusted so as to match the known theoretical dimer formation equilibrium constants for two gases under consideration, argon and water. Reasonable agreement between computed and available experimental data was found in terminal cluster size distributions in nozzle water expansions in a wide range of stagnation pressures. The proposed approach was found to be orders of magnitude faster than a comparable approach based on the DSMC method.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2011
Accession Number
ADA540238

Entities

People

  • Ingrid Wysong
  • Natalia Gimelshein
  • Ryan Jansen
  • Sergey Gimelshein

Organizations

  • University of Southern California

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Agreements
  • Air Force Research Laboratories
  • Algorithms
  • Chemical Reactions
  • Energy
  • Energy Transfer
  • Experimental Data
  • Gas Flow
  • Heat Energy
  • Heat Transfer
  • Mathematical Models
  • Molecular Dynamics
  • Monte Carlo Method
  • Particles
  • Rate Of Formation
  • Simulations
  • Stagnation Pressure

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Dynamics.
  • Quantum Chemistry