Kyoto University | Japan | Assoc. Prof. Abbas Khayyer | Lecture | #Vebleo‬

Title: Projection-based particle methods – state-of-the-art and future perspectives

Abstract:
Lagrangian meshfree methods, so-called Particle Methods, are new generation computational methods that have been proven as robust and potentially reliable computational methods for engineering and science. Due to their meshfree and Lagrangian features, particle methods provide substantial potential for precise simulations of applications involving moving boundaries and complex topological changes that are often encountered in coastal and ocean engineering. Particle methods have benefitted from a wide range of advancements in terms of stability, accuracy, applicability and computational efficiency during the past two decades. There are still several aspects corresponding to particle methods to be rigorously verified and carefully extended.
This talk comprises of a concise review on the latest achievements made in the context of one category of particle methods, namely, projection-based particle methods and their extended applications to engineering and science. Projection-based particle methods, including Incompressible Smoothed Particle Hydrodynamics (ISPH) and Moving Particle Semi-implicit (MPS), are founded on a rigorous mathematical concept, i.e. Helmholtz-Leray decomposition. In this talk this important mathematical concept and related mathematical conditions will be reviewed and its application for ISPH and MPS will be concisely described. Followed by the mathematical background, the ISPH and MPS numerical methods will be briefly introduced. The latest achievements corresponding to stability, accuracy and energy conservation enhancements as well as advancements related to simulations of multi-phase flows and hydroelastic fluid-structure interactions will be discussed. In specific, more attention will be dedicated to hydroelastic fluid-structure interactions in the context of projection particle methods, introducing methods for interactions of incompressible fluid flows with elastic structures in both Newtonian and Hamiltonian frameworks. Finally, the future perspectives for further enhancements of applicability and reliability of particle methods will be highlighted.

Keywords: Particle Methods, SPH, MPS, Projection Methods, Hydroelasticity

Biography:
Abbas Khayyer is an associate professor at Department of Civil and Earth Resources Engineering at Kyoto University, Japan. Abbas received his Ph.D. in 2008 from Kyoto University and then continued his academic journey as a postdoctoral researcher (2008-2009), lecturer (2009-2013) and associate professor (2013-present) at Department of Civil and Earth Resources engineering at Kyoto University. He has published more than 60 international SCI journal articles in different disciplines related to Computational Physics, Computational Fluid/Structural Dynamics and Ocean/Coastal Engineering. Abbas has won several international awards including the C. H. Kim award by International Society of Offshore and Polar Engineers (ISOPE) for his contribution to Computational Fluid Dynamics in Ocean Engineering. Abbas currently serves as an Associate Editor of Applied Ocean Research (published by Elsevier) and International Journal of Offshore and Polar Engineering (published by ISOPE), an Editor of Coastal Engineering Journal (published by Taylor & Francis) and has the honor of being an Editorial Board member of several other journals including European Journal of Mechanics B/Fluids and Ocean Engineering, both published by Elsevier. His main research interests include advancement and application of particle methods, including SPH and MPS, for practical engineering applications corresponding to Ocean and Coastal Engineering. Abbas has also received three research grants from JSPS (Japan Society for the Promotion of Science) as the Principal Investigator.