NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
A Gas-Kinetic Method for Hyperbolic-Elliptic Equations and Its Application in Two-Phase Fluid FlowA gas-kinetic method for the hyperbolic-elliptic equations is presented in this paper. In the mixed type system, the co-existence and the phase transition between liquid and gas are described by the van der Waals-type equation of state (EOS). Due to the unstable mechanism for a fluid in the elliptic region, interface between the liquid and gas can be kept sharp through the condensation and evaporation process to remove the "averaged" numerical fluid away from the elliptic region, and the interface thickness depends on the numerical diffusion and stiffness of the phase change. A few examples are presented in this paper for both phase transition and multifluid interface problems.
Document ID
19990088073
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Xu, Kun
(Institute for Computer Applications in Science and Engineering Hampton, VA United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1999
Subject Category
Numerical Analysis
Report/Patent Number
ICASE-99-31
NASA/CR-1999-209515
NAS 1.26:209515
Funding Number(s)
CONTRACT_GRANT: NAS1-97046
PROJECT: RTOP 505-90-52-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available