Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
The Riemann problem for a drift-flux model of compressible two-phase flow in a variable cross-section duct
Ist Teil von
International journal of non-linear mechanics, 2021-03, Vol.129, p.103644, Article 103644
Ort / Verlag
New York: Elsevier Ltd
Erscheinungsjahr
2021
Quelle
Elsevier ScienceDirect Journals
Beschreibungen/Notizen
The Riemann problem for isentropic drift-flux model of compressible two-phase flow in a variable cross-section duct is considered. First, the two-phase duct flow model is established based on the balance laws. Then, by averaging the equations of single phase flow, the drift-flux model in a variable cross-section duct is deduced. The model includes two parts: mass conservation and momentum conservation. The elementary waves that make up the Riemann solutions are analyzed subsequently. Besides, the global entropy condition is imposed to select the physical relevant solution when across the stationary wave. Furthermore, we discuss the uniqueness of Riemann solutions and conclude that the solutions are unique in an expanding duct while not unique in a contracting duct. The results may contribute to the design of numerical schemes in the future study.