Numerical solution of the two-phase expansion of a metastable flashing liquid jet using the dispersion-controlled dissipative scheme


Autoria(s): AVILA, J. A. J.; Pimenta, Marcos de Mattos; Moreira, Jose Roberto Simões
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

18/10/2012

18/10/2012

2010

Resumo

This paper presents a study of the stationary phenomenon of superheated or metastable liquid jets, flashing into a two-dimensional axisymmetric domain, while in the two-phase region. In general, the phenomenon starts off when a high-pressure, high-temperature liquid jet emerges from a small nozzle or orifice expanding into a low-pressure chamber, below its saturation pressure taken at the injection temperature. As the process evolves, crossing the saturation curve, one observes that the fluid remains in the liquid phase reaching a superheated condition. Then, the liquid undergoes an abrupt phase change by means of an oblique evaporation wave. Across this phase change the superheated liquid becomes a two-phase high-speed mixture in various directions, expanding to supersonic velocities. In order to reach the downstream pressure, the supersonic fluid continues to expand, crossing a complex bow shock wave. The balance equations that govern the phenomenon are mass conservation, momentum conservation, and energy conservation, plus an equation-of-state for the substance. A false-transient model is implemented using the shock capturing scheme: dispersion-controlled dissipative (DCD), which was used to calculate the flow conditions as the steady-state condition is reached. Numerical results with computational code DCD-2D vI have been analyzed. Copyright (C) 2009 John Wiley & Sons, Ltd.

Identificador

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, v.63, n.5, p.622-637, 2010

0271-2091

http://producao.usp.br/handle/BDPI/18237

10.1002/fld.2098

http://dx.doi.org/10.1002/fld.2098

Idioma(s)

eng

Publicador

JOHN WILEY & SONS LTD

Relação

International Journal for Numerical Methods in Fluids

Direitos

restrictedAccess

Copyright JOHN WILEY & SONS LTD

Palavras-Chave #flashing #evaporation waves #two-phase flow #shock wave #conservation equations #dispersion-controlled dissipative scheme #shock capturing schemes #Computer Science, Interdisciplinary Applications #Mathematics, Interdisciplinary Applications #Mechanics #Physics, Fluids & Plasmas
Tipo

article

original article

publishedVersion