An implicit partitioned coupling algorithm is used to simulate and investigate the interaction between a viscoelastic fluid and an elastic structure. As a test case, a lid-driven cavity with flexible bottom is studied...
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A synthesis is presented of recent numerical predictions for the F-16XL aircraft flow fields and aerodynamics. The computational results were all performed with hybrid RANS/LES formulations, with an emphasis on unstea...
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In this work, the analytical and geometrical analysis of the localization properties of the thermodynamically consistent elastoplastic Leon - Drucker-Prager (LDP) constitutive model for quasi-brittle materials like co...
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A Volume of Fluid (VOF) technique has been developed and coupled with an incompressible Euler/Navier Stokes solver operating on adaptive, unstructured grids to simulate the interactions of extreme waves and three-dime...
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ISBN:
(纸本)1563478072
A Volume of Fluid (VOF) technique has been developed and coupled with an incompressible Euler/Navier Stokes solver operating on adaptive, unstructured grids to simulate the interactions of extreme waves and three-dimensional structures. The present implementation follows the classic VOF implementation for the liquid-gas system, considering only the liquid phase. Extrapolation algorithms are used to obtain velocities and pressure in the gas region near the free surface. The VOF technique is validated against the classic dam-break problem, as well as series of 2-D sloshing experiments and results from SPH calculations. These and a series of other examples demonstrate that the present CFD method is capable of simulating violent free surface flows with strong nonlinear behaviour.
This paper describes the coupling of FEFLO, a general purpose compressible and incompressible flow solver based on adaptive unstructured grids with SIMPACT, a general purpose, large deformation, explicit structural dy...
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ISBN:
(纸本)1563478072
This paper describes the coupling of FEFLO, a general purpose compressible and incompressible flow solver based on adaptive unstructured grids with SIMPACT, a general purpose, large deformation, explicit structural dynamics code developed at the center for numericalmethods in engineering (CIMNE). Details on the codes, as well as the coupling strategy employed are given. Examples illustrate the possibilies the present fluid-structure capability offers.
The Particle Finite Element Method (PFEM) is presented for the solution of an incompressible viscous fluid flow with coupled heat transfer in three dimensions using a fully Lagrangian description of the motion. The Na...
The Particle Finite Element Method (PFEM) is presented for the solution of an incompressible viscous fluid flow with coupled heat transfer in three dimensions using a fully Lagrangian description of the motion. The Navier-Stokes equations are treated in a non linear Lagrangian manner through an implicit fractional step approach. The Lagrangian description allows avoiding the typical Eulerian problems of stabilization of the convective term, and the fractional step offers an appealing way of solving small symmetric positive definite matrices. The alpha-shape method is used to determine the position of the free surface. Details of the close relationship between time step, particle connectivity, and pressure stabilization are given.
In the last 10 years a family of methods called Meshless methods has been developed both for structural and fluid mechanics problems. After these ideas, a possible classification for numerical formulations may be the ...
In the last 10 years a family of methods called Meshless methods has been developed both for structural and fluid mechanics problems. After these ideas, a possible classification for numerical formulations may be the one that separates the methods that make use of a standard finite element mesh (such as those made of tetrahedra or hexahedra), and the methods that do not need a standard mesh, namely the meshless methods. Before solving a partial different equation by a numerical method, a possible alternative may be either to use a mesh method or a meshless method. This paper discusses this issue to show that this choice is not the right question.
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