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A kinetic formulation for a model coupling free surface and pressurised flows in closed pipes. (English) Zbl 1152.76020

Summary: The aim is to present a kinetic formulation of a model for the coupling of transient free surface and pressurised flows. Firstly, we revisit the system of Saint-Venant equations for free surface flow: we state some properties of Saint-Venant equations, we propose a kinetic formulation and we verify that this kinetic formulation leads to a Gibbs equilibrium that minimises (in some general case) the energy and preserves the still water steady state. Secondly, we propose a model for pressurised flows in a Saint-Venant-like conservative formulation. We then propose a kinetic formulation and we verify that this kinetic formulation leads to a Gibbs equilibrium that minimises in any case the energy and preserves the still water steady state. Finally, we propose a dual model that couples these two types of flow.

MSC:

76B99 Incompressible inviscid fluids
76M30 Variational methods applied to problems in fluid mechanics
Full Text: DOI

References:

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