A Solver for Stiff Finite-Rate Relaxation in Baer–Nunziato Two-Phase Flow Models
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In this paper we present a technique for constructing robust solvers for stiff algebraic source terms, such as those typically used for modelling relaxation processes in hyperbolic systems of partial differential equations describing two-phase flows, namely models of the Baer–Nunziato family. The method is based on an exponential integrator which employs an approximate linearised source term operator that is constructed in such a way that one can compute solutions to the linearised equations avoiding any delicate matrix inversion operations.
The authors of this work were supported by the German Research Foundation (DFG) through the project GRK 2160/1 “Droplet Interaction Technologies”.
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