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Theoretical and numerical aspects of the interfacial coupling: The scalar Riemann problem and an application to multiphase flows
1.  CEASaclay, DEN/DANS/DM2S/SFME/LETR, F91191 GifsurYvette, France 
We first focus on the coupling of two scalar conservation laws and state an existence result for the coupled Riemann problem. Numerical experiments are also proposed. We then consider, both from a theoretical and a numerical point of view, the coupling of twophase flow models namely a driftflux model and a twofluid model. In particular, the link between both models will be addressed using asymptotic expansions.
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