Development of Numerical Methodology for Unsteady Fluid–Solid Thermal Interaction in Multicomponent Flow Simulationстатья
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Дата последнего поиска статьи во внешних источниках: 1 мая 2024 г.
Аннотация:Abstract—This paper presents the current state of development of 3D methodology for numericalsimulation of unsteady thermal interaction of fluid flow and solid bodies. A fluid is a multicomponentmixture of ideal gases. As heat-conducting solid bodies one can consider aircraft elements,shells of combustion chamber, etc. For fluids, the extended system of the unsteady compressibleNavier–Stokes equations supplemented by multicomponent diffusion equations is considered. Forsolids, unsteady heat conduction equation is written. For fluid-solid interfaces, temperature andnormal heat flux are continuous across an interface. The developed technique exploits finite-volume discretization of the governing equations and time integration with splitting over physicalprocesses. The time step calculation is split into hyperbolic and parabolic stages. The hyperbolicstage is implemented with the explicit scheme. The parabolic stage is based on the special explicit-iterative Chebyshev scheme. To simulate the fluid–solid thermal interaction within parabolic stage,the energy equation for both fluid and solid is solved as the unified equation. This provides anapproximation of the interface continuity condition and coupling in interfacial heat exchange. Theproposed method is generalized for multi-block unstructured grids with parallel calculation of thefluid/solid regions and subsequent processing of the fluid-solid interfaces. To demonstrate thefeatures of our technique, the results of solving a test problem is shown and accuracy of the interfacecondition are discussed.