CUBIT mesh generation environment. Volume 1: Users manual

Blacker, Ted D.; Bohnhoff, William J.; Edwards, Tamsin

doi:10.2172/10176386

Cited by 89 publications

(65 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, manually creating this mesh in a mesh generation package such as Cubit 36 is not a trivial process, and may be intractable in reasonable time. Therefore, we employ the Conformal Decomposition Finite Element Method (CDFEM) 39 to create a computable, conformal mesh.…”

Section: Methodsmentioning

confidence: 99%

A Framework for Three-Dimensional Mesoscale Modeling of Anisotropic Swelling and Mechanical Deformation in Lithium-Ion Electrodes

Roberts

Brunini

Long

et al. 2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

Lithium-ion battery electrodes rely on a percolated network of solid particles and binder that must maintain a high electronic conductivity in order to function. Coupled mechanical and electrochemical simulations may be able to elucidate the mechanisms for capacity fade. We present a framework for coupled simulations of electrode mechanics that includes swelling, deformation, and stress generation driven by lithium intercalation. These simulations are performed at the mesoscale, which requires 3D reconstruction of the electrode microstructure from experimental imaging or particle size distributions. We present a novel approach for utilizing these complex reconstructions within a finite element code. A mechanical model that involves anisotropic swelling in response to lithium intercalation drives the deformation. Stresses arise from small-scale particle features and lithium concentration gradients. However, we demonstrate, for the first time, that the largest stresses arise from particle-to-particle contacts, making it important to accurately represent the electrode microstructure on the multi-particle scale. Including anisotropy in the swelling mechanics adds considerably more complexity to the stresses and can significantly enhance peak particle stresses. Shear forces arise at contacts due to the misorientation of the lattice structure. These simulations will be used to study mechanical degradation of the electrode structure through charge/discharge cycles. Capacity fade in lithium-ion batteries (LIB) is potentially influenced by a large number of mechanisms, 1 one of which is mechanical degradation of the electrode microstructure. Both electrodes experience mechanical deformation, and in this paper, we focus on the cathode of the lithium-cobalt-oxide (LiCoO 2 , or LCO) system.2 Cathodes are made up of a three-dimensional (3D), percolating, bicontinuous network consisting of solid, electroactive particles, a polymer binder, and electrolyte. The bicontinuous nature of this network is critical, as Li + ions must be able to transport from the anode, through the separator, to any particle in the cathode via the electrolyte. At the same time, electrons must be able to transport through the solid particle network to the current collector. Any particle that becomes physically isolated from, or poorly connected to, its network or from the electrolyte does not contribute to the electrochemical reactions, resulting in capacity loss.One way in which particles may become disconnected from their network is by the swelling, shrinking, and fracture mechanisms that may occur through many charge-discharge cycles.3-6 As lithium intercalates into the electrode particles, the crystal lattice spacing may change either isotropically or anisotropically. For LiCoO 2 cathodes in particular, the crystal lattice shrinks anisotropically upon lithium intercalation 7,8 As was measured by Reimers and Dahn, 7 and later in more detail by Amatucci et al., 8 the lattice shrinkage upon lithiation can be quite significant and is anisotropic in n...

show abstract

Section: Methodsmentioning

confidence: 99%

A Framework for Three-Dimensional Mesoscale Modeling of Anisotropic Swelling and Mechanical Deformation in Lithium-Ion Electrodes

Roberts

Brunini

Long

et al. 2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…Γ appearing in last equation of System (14). The equivalence between the algebraic formulations are illustrated in Figure 12 (Bottom).…”

Section: Dirichlet Neumann and Robin Conditionsmentioning

confidence: 99%

“…Further details on this technique can be found in [83] or [25], where non-manifold interfaces between volumes are created from an assembly model for conformal meshing. This technique, together with other approaches, is used in the CUBIT project [14]. It is a full-featured software toolkit for the robust generation of two-and three-dimensional finite element meshes and geometry preparation.…”

Section: Conforming Approachesmentioning

confidence: 99%

Domain Decomposition Methods for Domain Composition Purpose: Chimera, Overset, Gluing and Sliding Mesh Methods

Houzeaux

Cajas

Discacciati

et al. 2016

Arch Computat Methods Eng

View full text Add to dashboard Cite

“…An external meshing software such as Cubit (Blacker et al, 1994) can be employed to generate unstructured hexahedral grids, for example, for regional seismological applications (see Casarotti et al, 2008b;Stupazzini et al, 2009;Peter et al, 2011;Cupillard et al, 2012).…”

Section: Unstructured Meshingmentioning

confidence: 99%

“…Besides semi-analytical algorithms, full numerical schemes evolved, such as the finitedifference (FD) method. The FD method approximates solutions to the wave equation on a structured grid, applying low-order (e.g., Virieux, 1984), and later also high-order (e.g., Bayliss et al, 1986) numerical operators in 3-D, in order to improve the accuracy and computational efficiency. Due to restrictions in the geometrical flexibility of standard FD methods, applying structured grids with regular grid spacing, approaches which make use of variable grids have also been introduced (Pitarka, 1999;Ely et al, 2008;Kristek et al, 2010;Kozdon et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Regional wave propagation using the discontinuous Galerkin method

et al. 2013

View full text Add to dashboard Cite

Abstract. We present an application of the discontinuous Galerkin (DG) method to regional wave propagation. The method makes use of unstructured tetrahedral meshes, combined with a time integration scheme solving the arbitrary high-order derivative (ADER) Riemann problem. This ADER-DG method is high-order accurate in space and time, beneficial for reliable simulations of high-frequency wavefields over long propagation distances. Due to the ease with which tetrahedral grids can be adapted to complex geometries, undulating topography of the Earth's surface and interior interfaces can be readily implemented in the computational domain. The ADER-DG method is benchmarked for the accurate radiation of elastic waves excited by an explosive and a shear dislocation source. We compare real data measurements with synthetics of the 2009 L'Aquila event (central Italy). We take advantage of the geometrical flexibility of the approach to generate a European model composed of the 3-D EPcrust model, combined with the depthdependent ak135 velocity model in the upper mantle. The results confirm the applicability of the ADER-DG method for regional scale earthquake simulations, which provides an alternative to existing methodologies.

show abstract

CUBIT mesh generation environment. Volume 1: Users manual

Cited by 89 publications

References 2 publications

A Framework for Three-Dimensional Mesoscale Modeling of Anisotropic Swelling and Mechanical Deformation in Lithium-Ion Electrodes

A Framework for Three-Dimensional Mesoscale Modeling of Anisotropic Swelling and Mechanical Deformation in Lithium-Ion Electrodes

Domain Decomposition Methods for Domain Composition Purpose: Chimera, Overset, Gluing and Sliding Mesh Methods

Regional wave propagation using the discontinuous Galerkin method

Contact Info

Product

Resources

About