Advances in the development of a new cartesian explicit solver for hydrodynamics
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/332924
Tipus de documentText en actes de congrés
Data publicació2013
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
In order to efficiently address complex problems in hydrodynamics, the advances
in the dev lopment of a new method are presented here. This new CFD solver aims at
obtaining a good compromise in terms of accuracy, computational efficiency, and easy
handling of complex geometries. The chosen method is an Explicit Cartesian Finite Volume method
for Hydrodynamics (ECFVH) based on a compressible (hyperbolic) solver, with an embedded method
for interfaces and geometry handling. The solver's explicit nature is obtained through a
weakly-compressible approach chosen to simulate nearly-incompressible flows. The explicit
cell-centered resolution allows for an efficient solving of very large simulations
together with a straightforward handling of multi-physics. The use of an embedded
Cartesian grid ensures accuracy and efficiency, but also implies the need for a
specific treatment of complex solid geometries, such as the cut-cell method in the
fixed or moving body frame. Robustness of the cut-cell method is ensured by specific procedures to
circumvent small cell volume numerical errors. A characteristic flux method for solving the
hyperbolic part of the Navier-Stokes equations is used and introduces numerical
viscosity. This viscosity is evaluated prior to modeling viscous and turbulent effects. In a first
approach presented here viscous effects are computed via a finite difference Laplacian
operator
introduced as a source term. This solver is validated on 2-D test cases.
CitacióBigay, P. [et al.]. Advances in the development of a new cartesian explicit solver for hydrodynamics. A: MARINE V. "MARINE V : proceedings of the V International Conference on Computational Methods in Marine Engineering". CIMNE, 2013, p. 365-375. ISBN 978-84-941407-4-7.
ISBN978-84-941407-4-7
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Marine-2013_31- ... E DEVELOPMENT OF A NEW.pdf | 1,141Mb | Visualitza/Obre |