Advanced parallel computing in material forming with CIMLib

Mesri, Youssef; Digonnet, Hugues; Coupez, Thierry

doi:10.3166/ejcm.18.669-694

Cited by 30 publications

(17 citation statements)

References 14 publications

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“…The numerical simulations were carried out using the C++ CimLib finite element library (see [40,41]). The results obtained with the proposed approach, referred as ISM, are compared with solutions obtained either by standard solution (classical boundary conditions) or by other approaches.…”

Section: Numerical Experimentsmentioning

confidence: 99%

Immersed stress method for fluid–structure interaction using anisotropic mesh adaptation

Hachem

Feghali

Codina

et al. 2013

Numerical Meth Engineering

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International audienceThis paper presents advancements toward a monolithic solution procedure and anisotropic mesh adaptation for the numerical solution of fluid-structure interaction with complex geometry. First, a new stabilized three-field stress, velocity, and pressure finite element formulation is presented for modeling the interaction between the fluid (laminar or turbulent) and the rigid body. The presence of the structure will be taken into account by means of an extra stress in the Navier-Stokes equations. The system is solved using a finite element variational multiscale method. We combine this method with anisotropic mesh adaptation to ensure an accurate capturing of the discontinuities at the fluid-solid interface. We assess the behavior and accuracy of the proposed formulation in the simulation of 2D and 3D time-dependent numerical examples such as the flow past a circular cylinder and turbulent flows behind an immersed helicopter in a forward flight

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Section: Numerical Experimentsmentioning

confidence: 99%

Immersed stress method for fluid–structure interaction using anisotropic mesh adaptation

Hachem

Feghali

Codina

et al. 2013

Numerical Meth Engineering

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show abstract

“…These simulations have been carried out by using the CIMLIB finite element library. This C++ library, which is highly parallel, is developed at the Centre de Mise en Forme des Matériaux (Mines ParisTech, CNRS UMR 7635) by Coupez and co-workers (see [18,23,24]). …”

Section: Numerical Simulationsmentioning

confidence: 99%

3D finite element simulation of the matter flow by surface diffusion using a level set method

Bruchon

Drapier

Valdivieso

2010

Numerical Meth Engineering

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SUMMARYWithin the context of the sintering process simulation, this paper proposes a numerical strategy for the direct simulation of the matter transport by surface diffusion, in two and three dimensions. The level set formulation of the surface diffusion problem is first established. The resulting equations are solved by using a finite element method. A stabilization technique is then introduced, in order to avoid the spurious oscillations of the grain boundary that are a consequence of the dependence of the surface velocity on the fourth-order derivative of the level set function. The convergence and the accuracy of this approach are proved by investigating the change in an elliptic interface under surface diffusion. Cases in direct relation with the sintering process are analyzed besides: sintering between two grains of the same size or of two different sizes. Finally, 3D simulations involving a small number of particles show the ability of the proposed strategy to deal with strong deformations of the grain surface (formation of necks) and to access directly important parameters such as the closed porosity rate.

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“…This metric corresponds to an isotropic metric far from the interface (with a mesh size equal to h d for all directions) and to an anisotropic metric near the interface (with a mesh size equal to h in the direction x and equal to h d in the others). In practice, the mesh is generated in several steps using, through the CimLib librairy, the MTC mesher developed by Coupez [34,35]. This mesher is based on a topological optimization technique available in [16] for the anisotropic case.…”

Section: Anisotropic Mesh Adaptationmentioning

confidence: 99%

“…The boundary conditions (35) and (36) at the solid's interface are no longer applicable. Accordingly, the proposed approach consists in simulating the conjugate heat transfer by solving the coupled problem (1)-(3)-(13) for both the surrounding air and the heated object requiring only their material properties.…”

Section: Mixing Lawsmentioning

confidence: 99%

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Stabilized finite element solution to handle complex heat and fluid flows in industrial furnaces using the immersed volume method

Hachem

Kloczko

Digonnet

et al. 2010

Numerical Methods in Fluids

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International audienceWe consider the numerical simulation of conjugate heat transfer, incompressible turbulent flows for multicomponents systems using a stabilized finite element method. We present an immersed volume approach for thermal coupling between fluids and solids for heating high-alloy steel inside industrial furnaces. It consists in considering a single 3D grid of the furnace and solving one set of equations with different thermal properties. A distance function enables to define precisely the position and the interface of any objects inside the volume and to provide homogeneous physical and thermodynamic properties for each subdomain. An anisotropic mesh adaptation algorithm based on the variations of the distance function is then applied to ensure an accurate capture of the discontinuities that characterize the highly heterogeneous domain. The proposed method demonstrates the capability of the model to simulate an unsteady three-dimensional heat transfers and turbulent flows in an industrial furnace with the presence of three conducting solid bodies

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Advanced parallel computing in material forming with CIMLib

Cited by 30 publications

References 14 publications

Immersed stress method for fluid–structure interaction using anisotropic mesh adaptation

Immersed stress method for fluid–structure interaction using anisotropic mesh adaptation

3D finite element simulation of the matter flow by surface diffusion using a level set method

Stabilized finite element solution to handle complex heat and fluid flows in industrial furnaces using the immersed volume method

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