Open Access
Computer Methods in Applied Mechanics and Engineering
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In this article, a cubic Hermite collocation scheme for the solution of the coupled integro-partial differential equations governing the propagation of a hydraulic fracture in a state of plane strain is described.Abstract:
article i nfo We describe a novel cubic Hermite collocation scheme for the solution of the coupled integro-partial differential equations governing the propagation of a hydraulic fracture in a state of plane strain. Special blended cubic Hermite-power-law basis functions, with arbitrary index 0b αb1, are developed to treat the singular behavior of the solution that typically occurs at the tips of a hydraulic fracture. The implementation of blended infinite elements to model semi-infinite crack problems is also described. Explicit formulae for the integrated kernels associated with the cubic Hermite and blended basis functions are provided. The cubic Hermite collocation algorithm is used to solve a number of different test problems with two distinct propagation regimes and the results are shown to converge to published similarity and asymptotic solutions. The convergence rate of the cubic Hermite scheme is determined by the order of accuracy of the tip asymptotic expansion as well as the O(h 4 ) error due to the Hermite cubic interpolation. The errors due to these two approximations need to be matched in order to achieve optimal convergence. Backward Euler time-stepping yields a robust algorithm that, along with geometric increments in the time-step, can be used to explore the transition between propagation regimes over many orders of magnitude in time.read more
Citations
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Validation of FEM models describing moisture transport in heated concrete by Magnetic Resonance Imaging
W.H.A. Peelen,A.H.J.M. Vervuurt +1 more
TL;DR: In this paper, a finite element model (FEM) was developed to describe the transport of moisture in heated concrete, and the results of the MRI experiments were evaluated for the first time.
Journal Article
Effect of casting flow rate on steel flow phenomena in tundish
TL;DR: In this article, the results of numerical simulation of steel fl ow and mixing in real two strand tundish working in on of polish steelworks were analyzed taking into account their inflence on the h ydrodynamic c onditions oc curring in r eactor.
Book ChapterDOI
Edge-Based Anisotropic Mesh Adaptation for CFD Applications
TL;DR: This paper presents an anisotropic mesh adaptation technique relying on the length distribution tensor approach and an edge based error estimator to calculate a stretching factor providing a new edge length distribution, its associated tensor and the corresponding metric.
Dissertation
Modélisation du comportement biomécanique du disque intervertébral
TL;DR: In this article, a methodologie de diagnostic quantitatif de la viabilite discale and plus largement of disques intervertebraux (DIV) is ainsi proposee.
Dissertation
Block-based Adaptive Mesh Refinement Finite-volume Scheme for Hybrid Multi-block Meshes
TL;DR: A block-based adaptive mesh re nement (AMR) scheme is proposed and developed for solution of hyperbolic conservation laws on two-dimensional hybrid multi-block meshes and accuracy, robustness, and scalability of the hybrid mesh scheme are assessed.
References
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Book
An Introduction to Fluid Dynamics
TL;DR: The dynamique des : fluides Reference Record created on 2005-11-18 is updated on 2016-08-08 and shows improvements in the quality of the data over the past decade.
Book
A practical guide to splines
TL;DR: This book presents those parts of the theory which are especially useful in calculations and stresses the representation of splines as linear combinations of B-splines as well as specific approximation methods, interpolation, smoothing and least-squares approximation, the solution of an ordinary differential equation by collocation, curve fitting, and surface fitting.
Numerical solution of boundary value problems for ordinary differential equations
TL;DR: In this article, the Riccati method is used to solve boundary value problems for Ordinary Differential Equations and to solve nonlinear problems for BVPSs in the standard form.
Book
Numerical solution of boundary value problems for ordinary differential equations
TL;DR: This book discusses Consistency, Stability, and Convergence higher-Order One-Step Schemes Collocation Theory Acceleration Techniques Higher-Order ODEs Finite Element Methods and Initial Value Methods.
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