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Type: Artigo
Title: Roe-type Riemann Solver For Gas-liquid Flows Using Drift-flux Model With An Approximate Form Of The Jacobian Matrix
Author: da Silva Santim
Christiano Garcia; Rosa
Eugenio Spano
Abstract: This work presents an approximate Riemann solver to the transient isothermal drift-flux model. The set of equations constitutes a non-linear hyperbolic system of conservation laws in one space dimension. The elements of the Jacobian matrix A are expressed through exact analytical expressions. It is also proposed a simplified form of A considering the square of the gas to liquid sound velocity ratio much lower than one. This approximation aims to express the eigenvalues through simpler algebraic expressions. A numerical method based on the Gudunov's fluxes is proposed employing an upwind and a high order scheme. The Roe linearization is applied to the simplified form of A. The proposed solver is validated against three benchmark solutions and two experimental pipe flow data. Copyright (c) 2015 John Wiley & Sons, Ltd.
Subject: Drift-flux Model
Approximate Riemann Solver
Roe Linearization
Gas-liquid Flow
Non-linear System
Editor: Wiley-Blackwell
Rights: fechado
Identifier DOI: 10.1002/fld.4165
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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