James E Warner,Wilkins Aquino,Mircea D Grigoriu
James E Warner
This work presents a novel methodology for solving inverse problems under uncertainty using stochastic reduced order models (SROMs). Given statistical information about an observed state variable in a system, unknown parameters are estimate...
An immersogeometric variational framework for fluid-structure interaction: application to bioprosthetic heart valves [0.03%]
沉浸几何变分框架在流固耦合中的应用——以生物心脏瓣膜为例
David Kamensky,Ming-Chen Hsu,Dominik Schillinger et al.
David Kamensky et al.
In this paper, we develop a geometrically flexible technique for computational fluid-structure interaction (FSI). The motivating application is the simulation of tri-leaflet bioprosthetic heart valve function over the complete cardiac cycle...
A displacement-based finite element formulation for incompressible and nearly-incompressible cardiac mechanics [0.03%]
基于位移的心脏力学不可压缩和近似不可压缩有限元求解方法
Myrianthi Hadjicharalambous,Jack Lee,Nicolas P Smith et al.
Myrianthi Hadjicharalambous et al.
The Lagrange Multiplier (LM) and penalty methods are commonly used to enforce incompressibility and compressibility in models of cardiac mechanics. In this paper we show how both formulations may be equivalently thought of as a weakly penal...
A multiscale MD-FE model of diffusion in composite media with internal surface interaction based on numerical homogenization procedure [0.03%]
基于数值同化过程的复合介质内部表面相互作用多尺度MD-FE扩散模型
M Kojic,M Milosevic,N Kojic et al.
M Kojic et al.
Mass transport by diffusion within composite materials may depend not only on internal microstructural geometry, but also on the chemical interactions between the transported substance and the material of the microstructure. Retrospectively...
K P S Gahalaut,J K Kraus,S K Tomar
K P S Gahalaut
We present (geometric) multigrid methods for isogeometric discretization of scalar second order elliptic problems. The smoothing property of the relaxation method, and the approximation property of the intergrid transfer operators are analy...
Stefan K Kleiss,Clemens Pechstein,Bert Jüttler et al.
Stefan K Kleiss et al.
Finite Element Tearing and Interconnecting (FETI) methods are a powerful approach to designing solvers for large-scale problems in computational mechanics. The numerical simulation problem is subdivided into a number of independent sub-prob...
Dmitry A Fedosov,Bruce Caswell,George Em Karniadakis
Dmitry A Fedosov
We present a rigorous procedure to derive coarse-grained red blood cell (RBC) models, which yield accurate mechanical response. Based on a semi-analytic theory the linear and nonlinear elastic properties of healthy and infected RBCs in mala...
Modified Immersed Finite Element Method For Fully-Coupled Fluid-Structure Interations [0.03%]
修正的浸入式有限元法在流固耦合问题中的应用
Xingshi Wang,Lucy T Zhang
Xingshi Wang
In this paper, we develop a "modified" immersed finite element method (mIFEM), a non-boundary-fitted numerical technique, to study fluid-structure interactions. Using this method, we can more precisely capture the solid dynamics by solving ...
Distance fields on unstructured grids: Stable interpolation, assumed gradients, collision detection and gap function [0.03%]
非结构网格上的距离场：稳定插值、假设梯度、碰撞检测和间隙函数
Sebastian Wolff,Christian Bucher
Sebastian Wolff
This article presents a novel approach to collision detection based on distance fields. A novel interpolation ensures stability of the distances in the vicinity of complex geometries. An assumed gradient formulation is introduced leading to...
A mesoscopic bridging scale method for fluids and coupling dissipative particle dynamics with continuum finite element method [0.03%]
一种介观尺度流体连接方法及耗散粒子动力学与连续介质有限元法的耦合方法研究
Milos Kojic,Nenad Filipovic,Akira Tsuda
Milos Kojic
A multiscale procedure to couple a mesoscale discrete particle model and a macroscale continuum model of incompressible fluid flow is proposed in this study. We call this procedure the mesoscopic bridging scale (MBS) method since it is deve...