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The immersed boundary method is a numerical and mathematical formulation for solving fluid-structure interaction problems. It relies on solving fluid equations on an Eulerian fluid grid and interpolating the resulting velocity back onto…

数值分析 · 数学 2020-03-19 Ondrej Maxian , Charles S. Peskin

The interface problem describing the scattering of time-harmonic electromagnetic waves by a dielectric body is often formulated as a pair of coupled boundary integral equations for the electric and magnetic current densities on the…

数值分析 · 数学 2011-02-28 Martin Costabel , Frédérique Le Louër

In boundary element methods, the method of using double nodes at corners is a useful approach to uniquely define the normal direction of boundary elements. However, matrix equations constructed by conventional boundary integral equations…

数值分析 · 数学 2019-06-27 Satoshi Tomioka , Shusuke Nishiyama , Yutaka Matsumoto , Naoki Miyamoto

An efficient, accurate, and flexible numerical method is proposed for the solution of the swimming problem of one or more autophoretic particles in the purely-diffusive limit. The method relies on successive boundary element solutions of…

流体动力学 · 物理学 2016-09-13 Thomas D. Montenegro-Johnson , Sebastien Michelin , Eric Lauga

We consider the inverse problem of reconstructing the interior boundary curve of a doubly connected domain from the knowledge of the temperature and the thermal flux on the exterior boundary curve. The use of the Laguerre transform in time…

数值分析 · 数学 2024-02-23 Roman Chapko , Leonidas Mindrinos

This articles first investigates boundary integral operators for the three-dimensional isotropic linear elasticity of a biphasic model with piecewise constant Lam\'e coefficients in the form of a bounded domain of arbitrary shape surrounded…

数值分析 · 数学 2021-03-08 Benjamin Stamm , Shuyang Xiang

This paper describes a mixed direct-iterative method for boundary integral formulations of dielectric solvation models. We give an example for which a direct solution at thermal accuracy is nontrivial and for which Gauss-Seidel iteration…

chem-ph · 物理学 2008-02-03 S. A. Corcelli , J. D. Kress , L. R. Pratt , G. J. Tawa

This paper describes a novel numerical model aiming at solving moving-boundary problems such as free-surface flows or fluid-structure interaction. This model uses a moving-grid technique to solve the Navier--Stokes equations expressed in…

计算工程、金融与科学 · 计算机科学 2022-09-29 Nicolas Bodard , Roland Bouffanais , Michel O. Deville

In this paper, we develop second kind integral formulations for flexural wave scattering problems involving the clamped, supported, and free plate boundary conditions. While the clamped plate problem can be solved with layer potentials…

数值分析 · 数学 2025-04-09 Peter Nekrasov , Zhaosen Su , Travis Askham , Jeremy G. Hoskins

The boundary element method (BEM) provides an efficient numerical framework for solving multiple scattering problems in unbounded homogeneous domains, since it reduces the discretization to the domain boundaries, thereby condensing the…

机器学习 · 计算机科学 2025-12-03 Rémi Marsal , Stéphanie Chaillat

In this paper, we discuss the stable discretisation of the double layer boundary integral operator for the wave equation in $1d$. For this, we show that the boundary integral formulation is $L^2$-elliptic and also inf-sup stable in standard…

数值分析 · 数学 2025-02-04 Daniel Hoonhout , Carolina Urzúa-Torres

The integrable open-boundary conditions for the Bariev model of three coupled one-dimensional XY spin chains are studied in the framework of the boundary quantum inverse scattering method. Three kinds of diagonal boundary K-matrices leading…

强关联电子 · 物理学 2009-11-07 A. Foerster , M. D. Gould , X. -W. Guan , I. Roditi , H. -Q Zhou

A simple, yet efficient procedure to solve quasistatic problems of special linear visco-elastic solids at small strains with equal rheological response in all tensorial components, utilizing boundary element method (BEM), is introduced.…

数值分析 · 数学 2014-02-27 C. G. Panagiotopoulos , V. Mantic , T. Roubicek

Boundary value problems for integrable nonlinear evolution PDEs formulated on the half-line can be analyzed by the unified method introduced by one of the authors and used extensively in the literature. The implementation of this general…

偏微分方程分析 · 数学 2015-05-30 A. S. Fokas , J. Lenells

In this paper we develop a class of efficient Galerkin boundary element methods for the solution of two-dimensional exterior single-scattering problems. Our approach is based upon construction of Galerkin approximation spaces confined to…

数值分析 · 数学 2018-01-16 Fatih Ecevit , Hasan Hüseyin Eruslu

Consider the elastic scattering of a time-harmonic wave by multiple well separated rigid particles in two dimensions. To avoid using the complex Green's tensor of the elastic wave equation, we utilize the Helmholtz decomposition to convert…

数值分析 · 数学 2020-08-17 Jun Lai , Peijun Li

The integrable open-boundary conditions for the model of three coupled one-dimensional XY spin chains are considered in the framework of the quantum inverse scattering method. The diagonal boundary K-matrices are found and a class of…

统计力学 · 物理学 2009-10-30 Anthony J. Bracken , Xiang-Yu Ge , Yao-Zhong Zhang , Huan-Qiang Zhou

There is a need for covariant solutions of bound state equations in order to construct realistic QCD based models of mesons and baryons. Furthermore, we ideally need to know the structure of these bound states in all kinematical regimes,…

高能物理 - 唯象学 · 物理学 2007-05-23 A. G. Williams , K. Kusaka , K. M. Simpson

We present a method to impose linear shear flow in discrete-velocity kinetic models of hydrodynamics through the use of sliding periodic boundary conditions. Our method is derived by an explicit coarse-graining of the Lees-Edwards boundary…

软凝聚态物质 · 物理学 2007-05-23 R. Adhikari , J. -C. Desplat , K. Stratford

Algorithms for initializing particle distribution in SPH simulations are important for improving simulation accuracy. However, no such algorithms exist for boundary integral SPH models, which can model complex geometries without requiring…

计算工程、金融与科学 · 计算机科学 2024-12-30 Parikshit Boregowda , G R Liu