The workshop will run for three days, commencing on 18 October 2017, and concluding on Friday 20 October 2017.
The program will include:
Each paper presentation will be allocated 13 minutes, and most sessions will consist of four paper presentations plus a 13 minute panel discussion (total of 65 minutes).
Download Workshop presentation schedule , which may subjected to minor changes. Please refer to the workshop website for latest version.
Before the workshop there is an SPH training day on 17 October 2017. Further details can be found on the SPH Training Day page.
Prof. J. S. Chen
William Prager Chair Professor, Structural Engineering Department, Director, Center for Extreme Events Research, University of California, San Diego
Title: An Implicit Gradient Reproducing Kernel Particle Method: Theory and Applications
Abstract: High strain rate events such as projectile penetration and blast often result in fragmentation, complex contact conditions, and severe material damage. The Reproducing Kernel Particle Method (RKPM) relies on nodal integration to yield a pure point-based method for effective simulation of these events, however stability of nodal integration is difficult to achieve without upsetting computational efficiency or introducing user-tuneable parameters. In this work, a naturally stabilized nodal integration method is formulated under a strain-smoothing framework, and a variational consistency correction for nodal integration is introduced to ensure optimal convergence. Taylor expansion of nodal strains in conjunction with implicit gradients yields high computational efficiency, with stabilization constants naturally arising as moments of inertia of nodal domains. The method is cast under a strain smoothing framework to achieve additional stability in extreme event modelling, with the benefit of further enhancing computational efficiency. Simulation of blast and penetration events will be presented to demonstrate the effectiveness of the proposed method.
Bio: J. S. Chen earned his undergraduate degree from National Central University (1978-1982) in Taiwan, and received master's (1986) and Ph.D. (1989) from Northwestern University. He worked in GenCorp's Research Division from 1989 to 1994. From 1994 to 2001, he held a faculty position in the Mechanical Engineering Department of The University of Iowa before moving to UCLA in 2001, where he served as the Chair of Civil & Environmental Engineering Department from 2007 to 2012. He was the Chancellor's Professor in the Civil & Environmental Engineering Department at UCLA and also Professor of Mechanical & Aerospace Engineering Department and Mathematics Department. In 2013, he joined the Structural Engineering Department of UCSD as the inaugural holder of the William Prager Endowed Chair. He also is the director of the Center for Extreme Events Research at the Jacobs School of Engineering at UC San Diego.
Prof. David Le Touzé
Deputy Head, LHEEA research dept. (ECN and CNRS)
Head, H2I research group of LHEEA
Head, Centrale Nantes - Bureau Veritas Chair
Head, IRT Jules Verne SimAvHy Chair
Title: Smoothed Particle Hydrodynamics, fact checking: from theory to applications
Abstract: An overview of the Smoothed Particle Hydrodynamics applied to free-surface and interface flows is provided in the talk, under the form of fact checking. The complex links between the Lagrangian feature of the method, the smoothed and discretized operators, the modeling of physical terms and boundary conditions, on the one hand, and the conservation, convergence and accuracy of the method, on the other hand, are discussed. The links between the physical modeling of free-surface conditions and incompressibility, and the time solving and HPC implementation of the method are also explored. This current understanding of the SPH method permits to highlight the current successful SPH schemes, their accuracy, efficiency, limitations and target types of applications. A set of example successful industrial engineering applications is presented. The interest and feasibility of coupling to other methods is also highlighted.
Bio: Prof. David LE TOUZÉ is 40 years old. He got his MSc in Hydrodynamics and Ocean Engineering from Ecole Centrale Nantes (Nantes, France) in 2000. Ecole Centrale Nantes is a highly competitive French « Grande Ecole » which awards MScs and PhDs only. He then got his PhD with honors in 2003 from the same institute, whose topic was modeling gravity wave generation and propagation by spectral methods. He spent 2 years of post-doc at CNR-INSEAN (Rome, Italy) in 2004-05 where he started working in SPH. He came back to Ecole Centrale Nantes in 2006 and became Assistant Professor in 2007, Associate Professor in 2010 and Full Professor in 2012. His researches revolve mainly around free-surface flows. He is leading since 2012 a research group on Hydrodynamics, Interfaces and Interactions (H2i) which counts 8 professors and researchers, 14 PhD students, and 6 post-docs. His current research topics cover different numerical methods and techniques: SPH (Smoothed Particle Hydrodynamics), incompressible (OpenFOAM) and weakly-compressible (WCCH) Finite Volumes, Adaptive Mesh Refinement (AMR), Immersed Boundary Method (IBM), Vortex Method (DVH), Lattice-Boltzmann Method (LBM). He is also working on different method couplings: potential (waves) to Navier-Stokes Finite Volume Method for wave-structure interactions, SPH to Finite Element Method (FEM) for fluid-structure interaction, SPH to Finite Volume Method for efficient solutions of complex flows. Main applications of his research are in the fields of marine engineering (many naval, offshore and marine renewable energy topics), automotive (aquaplaning, gear boxes), aeronautics (ditching) and health (cardio-vascular flows). He is currency leading 7 industrial projects (over 5M contracts). He is the author of 30+ journal publications, with a google h-index of 22. He is also Deputy Head of his research department (LHEEA, 140 staff) which is a joint research unit between Ecole Centrale Nantes and CNRS.