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Titelei/Inhaltsverzeichnis [chapter]

Marcel König
2018 Partitioned Solution Strategies for Strongly-Coupled Fluid-Structure Interaction Problems in Maritime Applications  
A framework for the partitioned analysis of general multifield problems is proposed and implemented in the generic software library comana, which is verified against various benchmark problems and successfully  ...  In this thesis, a partitioned solution approach is followed to solve these kind of problems, which does not only enable the use of different discretization schemes for each of the subproblems but also  ...  on and for sharpening the scope of my research.  ... 
doi:10.51202/9783186351180-i fatcat:rfvb5orjwzdcdpddkxmypse4ke

Monolithic cut finite element based approaches for fluid-structure interaction [article]

Benedikt Schott, Christoph Ager, Wolfgang A. Wall
2018 arXiv   pre-print
In addition to a pure fixed-grid FSI method, also advanced fluid domain decomposition techniques are considered rendering in highly flexible discretization methods for the FSI problem.  ...  coupled multiphysics problems.  ...  Domains, Boundaries and Conventions Let Ω(t) := 1 i N dom Ω i (t) be the overall physical domain of a multifield problem consisting of a partition into N dom 1 disjoint, possibly time-dependent subdomains  ... 
arXiv:1807.11379v1 fatcat:3il2co7zyrc2xgjheqpa435mea

Reactive transport codes for subsurface environmental simulation

C. I. Steefel, C. A. J. Appelo, B. Arora, D. Jacques, T. Kalbacher, O. Kolditz, V. Lagneau, P. C. Lichtner, K. U. Mayer, J. C. L. Meeussen, S. Molins, D. Moulton (+5 others)
2014 Computational Geosciences  
The descriptions include a C. I. Steefel ( ) · B. Arora · S. Molins · N.  ...  Spycher high-level list of capabilities for each of the codes, along with a selective list of applications that highlight their capabilities and historical development.  ...  The basic concept is to provide a flexible numerical framework for solving coupled multifield problems.  ... 
doi:10.1007/s10596-014-9443-x fatcat:hbigyed6r5c5bkkk3wdcbpylz4

A Component Architecture for High-Performance Scientific Computing

David E. Bernholdt, Benjamin A. Allan, Robert Armstrong, Felipe Bertrand, Kenneth Chiu, Tamara L. Dahlgren, Kostadin Damevski, Wael R. Elwasif, Thomas G. W. Epperly, Madhusudhan Govindaraju, Daniel S. Katz, James A. Kohl (+14 others)
2006 The international journal of high performance computing applications  
The Common Component Architecture (CCA) provides a means for software developers to manage the complexity of large-scale scientific simulations and to move toward a plug-and-play environment for high-performance  ...  The design places minimal requirements on components and thus facilitates the integration of existing code into the CCA environment.  ...  We further acknowledge our collaborators outside the CCA Forum and the early adopters of the CCA for the impor-tant contributions they have made both to our understanding of CBSE in the high-performance  ... 
doi:10.1177/1094342006064488 fatcat:ybzdejmep5ci7gwvpxlju4giii

Shell structures—a sensitive interrelation between physics and numerics

E. Ramm, W. A. Wall
2004 International Journal for Numerical Methods in Engineering  
In the second part these aspects are reflected on related computational models and numerical procedures. This discussion is carried through a number of selected problems and examples.  ...  It need to be said that the paper is the outcome of a general plenary lecture addressing fundamental aspects rather than concentrating on a specific formulation or numerical scheme.  ...  Matthias Hoermann, Michael Gee, Andreas Lipka, especially for their intensive efforts in software engineering and for performing some of the large scale computations presented in this study.  ... 
doi:10.1002/nme.967 fatcat:sypdhnoecbcinjpj4woacjaoii

An intergrid transfer operator using radial basis functions with application to cardiac electromechanics

Matteo Salvador, Luca Dede', Alfio Quarteroni
2020 Computational Mechanics  
In the framework of efficient partitioned numerical schemes for simulating multiphysics PDE problems, we propose using intergrid transfer operators based on radial basis functions to accurately exchange  ...  We validate our approach by a numerical test for which we also show the scalability of the intergrid transfer operator in the framework of high performance computing.  ...  To view a copy of this licence, visit http://creativecomm  ... 
doi:10.1007/s00466-020-01861-x fatcat:nskva6xdb5eaxmygh6mhfntyoi

Modeling and Simulation of Laser Processing of Particulate-Functionalized Materials

T. I. Zohdi
2015 Archives of Computational Methods in Engineering  
Following a series of work in  ...  The objective of this paper is to focus on one of the "building blocks" of additive manufacturing technologies, namely selective laser-processing of particlefunctionalized materials.  ...  Acknowledgments This work was funded in part by the Army Research Laboratory through the Army High Performance Computing Research Center (cooperative agreement W911NF-07-2-0027).  ... 
doi:10.1007/s11831-015-9160-1 fatcat:ajzch2moenannntdiwqu5mxbva

Non intrusive reduced order modeling of parametrized PDEs by kernel POD and neural networks [article]

Matteo Salvador and Luca Dede' and Andrea Manzoni
2021 arXiv   pre-print
In particular, we use KPOD in place of the more classical POD, on a set of high-fidelity solutions of the problem at hand to extract a reduced basis.  ...  of a reduced-order space and neural networks for the evaluation of the reduced-order approximation.  ...  A. Quarteroni, Dr. F. Regazzoni and Dr. S. Fresca for the useful discussions about numerical analysis, nonlinear dimensionality reduction and deep learning.  ... 
arXiv:2103.17152v1 fatcat:vabtvcls3naancufd7vlqgchru

NMR studies of complex surfactant systems

Olle Söderman, Peter Stilbs
1994 Progress in nuclear magnetic resonance spectroscopy  
Acknowledgements References Acknowledgements-We thank Merle Harne for linguistic help in the compilation of this article.  ...  is obtained which depends only on the slow motion (for a spin 1 nucleus): where x is the quadrupole coupling constant, and Figure 1 gives the dependence of AR (for a C-D fragment) on the axial ratio  ...  Wong et al. applied multifield r3C measurements and a previously developed differential line broadening method in spin coupled r3C spectra of the system tetradecyltrimethylammonium bromide @TAB)-sodium  ... 
doi:10.1016/0079-6565(94)80013-8 fatcat:kodu2p46nfbpbcll3l4xi7364u

A computational framework for microstructural modelling of polycrystalline materials with damage and failure [article]

Vincenzo Gulizzi
2018 arXiv   pre-print
In the present thesis, a computational framework for the analysis of the deformation and damage phenomena occurring at the micro-scale of polycrystalline materials is presented.  ...  The computational framework developed in this thesis is based on a non-linear multi-domain BEM approach for generally anisotropic materials and is devoted to the analysis of three-dimensional polycrystalline  ...  The constants c iJKl are the multifield coupling coefficients of the MEE material and are defined by 2, 3 the mechanical body forces, f e (x) the electric charge density and f m (x) electric current  ... 
arXiv:1802.02258v1 fatcat:zww5egs3czgh5dwx6l6q2sijtu

Computational Methods for Fracture in Brittle and Quasi-Brittle Solids: State-of-the-Art Review and Future Perspectives

Timon Rabczuk
2013 ISRN Applied Mathematics  
The main focus of this paper will be on computational methods for discrete fracture (discrete cracks).  ...  An overview of computational methods to model fracture in brittle and quasi-brittle materials is given. The overview focuses on continuum models for fracture.  ...  ] , inverse problems [127, 128] , multifield problems [129] [130] [131] [132] , among others.  ... 
doi:10.1155/2013/849231 fatcat:4q4tjn5ssngihaq7atinpluxai

An FFT-based spectral solver for interface decohesion modelling using a gradient damage approach

L. Sharma, R. H. J. Peerlings, P. Shanthraj, F. Roters, M. G. D. Geers
2019 Computational Mechanics  
This nonlocal variable results from the solution of a gradient damage based regularisation equation within the interphase subdomain.  ...  The inability of an FFT solver to deal with sharp interfaces discards the use of conventional cohesive zones to model the interfacial mechanical behaviour within this framework.  ...  Acknowledgements The authors would like to acknowledge the interesting discussions with Prof. Bob Svendsen of RWTH Aachen University and Max Planck Institut für Eisenforschung, Düsseldorf, Germany.  ... 
doi:10.1007/s00466-019-01801-4 fatcat:x6rvwt2zsfegvdqnmudzgj7wqe

An orthotropic electro-viscoelastic model for the heart with stress-assisted diffusion

Adrienne Propp, Alessio Gizzi, Francesc Levrero-Florencio, Ricardo Ruiz-Baier
2019 Biomechanics and Modeling in Mechanobiology  
We propose and analyse the properties of a new class of models for the electromechanics of cardiac tissue.  ...  , coupled with a four-variable phenomenological model for human cardiac cell electrophysiology, which produces an accurate description of the action potential.  ...  We also thank the efforts of two anonymous referees whose many constructive comments lead to a number of improvements to the manuscript.  ... 
doi:10.1007/s10237-019-01237-y pmid:31630280 fatcat:5i7lrts455f45b6o444pmmxqxa

FEMPAR: An Object-Oriented Parallel Finite Element Framework

Santiago Badia, Alberto F. Martín, Javier Principe
2017 Archives of Computational Methods in Engineering  
It is a highly modularized, flexible, and extensible library, that provides a set of modules that can be combined to carry out the different steps of the simulation pipeline.  ...  FEMPAR is a framework that provides users with out-of-the-box state-of-the-art discretization techniques and highly scalable solvers for the simulation of complex applications, hiding the dramatic complexity  ...  Compliance with Ethical Standards Conflict of interest The authors declare that they have no conflict of interest.  ... 
doi:10.1007/s11831-017-9244-1 pmid:29962831 pmcid:PMC6003441 fatcat:ighq7azdkvfsripfpsqvq5rwtm

A metric approach to a class of doubly nonlinear evolution equations and applications

Riccarda Rossi, Alexander Mielke, Giuseppe Savaré
2009 Annali della Scuola Normale Superiore di Pisa (Classe Scienze), Serie V  
This paper deals with the analysis of a class of doubly nonlinear evolution equations in the framework of a general metric space.  ...  We propose for such equations a suitable metric formulation (which in fact extends the notion of Curve of Maximal Slope for gradient flows in metric spaces, see [5] ), and prove the existence of solutions  ...  ), is a solution of Problem 8.4.  ... 
doi:10.2422/2036-2145.2008.1.04 fatcat:us27dkdylbeuxhfuprkfirzdge
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