Brief CV of Invited Speaker:

Krish Thiagarajan Sharman is a Professor of marine and offshore wind energy in the Department of Mechanical & Industrial Engineering, University of Massachusetts Amherst, USA. He is also an Endowed Chair Emeritus in Renewable Energy.  He holds a PhD in Naval Architecture and Marine engineering from the University of Michigan, and has been an academic at various universities in Australia and the US over the past 25 years. His areas of interest focus on design and fluid-structure interaction analysis of floating offshore wind systems, wave and tidal energy systems, coastal food production systems and offshore platforms in general.

Abstract:

Moorings are one of the more vulnerable components of an offshore system. In offshore wind and marine renewables sectors, there is increasing use of synthetic material for mooring systems. Many mooring failures in the oil and gas industry have gone unreported, and those that had a consequence and thus reported, gave an impression of high levels of unknown risk. This talk will discuss two research studies conducted on mooring systems and examine challenges in station keeping and integrity of mooring lines. We will also present broad challenges moving forward, including effects of climate change.

Brief CV of Invited Speaker:

Prof. Tomoki Ikoma is a professor of the department of oceanic architecture and engineering in the college of science and technology (CST) at Nihon University, Japan. He graduated from the department of oceanic architecture and engineering, the college of science and technology at Nihon University, Japan in 1992 and completed the master course of the department in 1994. In addition, he completed the PhD course of the department at Nihon University and received the PhD degree in engineering (Dr. of Engineering in Japan) from Nihon University in 1997. He had worked for the institute of industrial science at the university of Tokyo as a post-doctor and a research associate from 1997 to 2001. After moving onto Nihon University as a research associate in 2001, he has been a professor in 2015. Also, he has been a vice dean of CST. When he was as associate professor, he had stayed in the department of naval architecture and ocean engineering at the University of Strathclyde, Glasgow as an academic visitor for a year since September in 2012. Prof. Ikoma is an executive committee member of the ocean energy association – Japan, a vice president at the Japanese association for coastal zone studies and the symposium coordinator of OSU-SYMP-5 at ASME international conference on OMAE. Also he will be a co-conference chair of OMAE 2026 in Tokyo. Prof. Ikoma has studied on hydrodynamics, in particular, wave-structure interaction problems of offshore floating systems including the hydroelasticity of very large floating structures. Also he has studied hydrodynamic predictions and estimation of its performance to harvest wave power on oscillating water column type wave energy converters. In addition, he studies floating offshore wind turbine systems and tidal turbine systems too.

Abstract:

There are many kinds of wave energy converters (WECs) and their developments have been still continued by many researchers. Oscillating water column (OWC) types are one of major and historical WECs and several sea tests have been conducted in the world. This presentation focuses on OWC type WECs and in particular a novel OWC WEC type. To attach projecting walls (PWs) onto an OWC WEC which had inlet-out-let of water (waves) toward front of itself has been proposed. This is called as a PW-OWC type. Although mechanism to produce electricity by OWC type WECs are simple and reasonable, other WEC types more mechanical have been preferred despite using an oil pressure system. The presentation will highlight the benefits of OWC types. Besides, the presentation offers theoretical treatments to predict hydrodynamic forces and PTO performance of OWC types by using a linear potential theory-based method.

Brief CV of Invited Speaker:

Dr. Huangwei Zhang is an assistant professor in Department of Mechanical Engineering at National University of Singapore (NUS). He received his bachelor’s degree in engineering mechanics and master’s degree in fluid mechanics in 2007 and 2009 respectively from Beihang University. He worked as a research associate in Peking University from 2009 to 2011. He obtained his PhD in energy and combustion at the University of Cambridge in 2015. He then worked as a post-doctoral research associate from 2015 to 2017 at Cambridge. His research covers detonation, engine and propulsion, multiphase combustion, zero-carbon fuels, as well as thermal management and safety of lithium-ion batteries. His research is funded by Singapore Ministry of Education, Ministry of Defense, National Research Foundation, and involves substantial industrial collaborations. He is the principal investigator in NUS (Chongqing) Research Institute and Center for Hydrogen Innovations. He has published more than 90 peer-reviewed journal papers in the areas of combustion, energy, and fluid mechanics. He is a senior member of AIAA and member of The Combustion Institute.

Abstract:

This talk will present the latest developments of the Eulerian-Lagrangian method based on the open-source code OpenFOAM for simulating compressible reactive flows. Dilute and moderately dense particle-laden flows are considered, targeting the different flow regimes in engineering applications. For the dilute regime, the influences of the ratio of the Lagrangian particle size to the Eulerian mesh size on the droplet behaviors will be first discussed and the strong convection effects in the high-speed flows will be highlighted. Then the different problems will be discussed, including the droplet evaporation and autoignition under isochoric conditions and the spray detonation wave propagation (including shock wave and reaction front). For the dense regime, the MPPIC (multiphase particle-in-cell) method is developed and implemented for the compressible flows. The theoretical aspects will be first introduced, followed by the introductions of the numerical implementations based on OpenFOAM. Then the interactions between an incident shock wave and dense particle curtain are studied and the particle collision effects on the gas dynamics and curtain morphology under different curtain and particle conditions are evaluated. Finally, some open questions in modelling the two-phase compressible reactive flows will be presented at the end of this talk.

Professor Weiwei Zhang is Chang Jiang Scholars and Excellent Young Scientists in Northwestern Polytechnical University. He made his bachelor and master of science in 2001 and 2004 respectively, both at Northwestern Polytechnical University, China's premier institution in aerospace science. In 2006 he continued with a PhD on an Efficient Analysis for Aeroelasticity Based on Computational Fluid Dynamics. His research is on artificial intelligence applications in fluid mechanics including unsteady aerodynamics, aeroelastics, and flow control. He has won youth science and technology award of the Chinese aerodynamics society and Chinese aeronautic society. He has received the National Excellent Youth Fund and the Ministry of Education's New Century Talents Award. He has published over 100 articles in premier international journals. He is now Vice Chairman of the China Aerodynamics Society and Director of the International Joint Institute of Intelligence in Fluid Mechanics. He is Associate Editors of 10 premier international and domestic journals.

Abstract:

Traditionally the underlying physics of fluid mechanics is being explored by theoretical and computational methods along with experimental measurements. Recently there is a resurgence of data-driven methods and machine learning to provide a fourth pillar as a unifying force towards improved understanding and controlling of fluid flow. This presentation includes three parts, the first is about Data Fusion Aerodynamic modeling for dynamic stall of airfoils and an aircraft, the second is about Turbulence machine learning for high Re numbers flow, the third is about adaptive control of transonic buffet flow. Those works show the recent advances in AI techniques in fluid mechanics.

Brief CV of Invited Speaker:

Prof. Wentao Wang is currently a research professor of China Ship Scientific Research Center (CSSRC) and the director of Hydrodynamics Research Department of CSSRC. He was the member of Resistance Committee of 28th International Towing Tank Conference (ITTC) and the member of Resistance and Propulsion Committee of 29th ITTC. He is now the CSSRC’s representative of Advisory Council of 30th ITTC. He is the member of Ship Mechanics Committee of CSNAME. He leads ten national research projects on resistance & propulsion, ship flow measurement, and uncertainty analysis etc. He was awarded on Science and Technology Progress several times by CSNAME and CSSC for his project achievements. He published more than 40 papers and standards, and he is the author of more than 100 technical reports of CSSRC.

Abstract:

Wave breaking phenomena often occur on bow area of middle/high speed ship. Such complex unsteady wave breaking induced resistance component is a large amount of total resistance of the ship. Spilling, plunging, collapsing and surging are typical wave breaking types and difficult to be captured by CFD. The previous wave breaking studies for surface ships were for naval surface combatants 5415 and mostly focused on single-phase free-surface modeling, quasi-steady plunging bow and steady spilling shoulder breaking waves. More violent plunging-type bow breaking waves were observed for the KRISO Container Ship (KCS). The objective of the present study is to conduct KCS unsteady bow wave breaking experiments for physics and CFD validation in the model scale. Experimental results are presented on KCS bow wave breaking with two different scaled models at a high Froude number (Fr = 0.35), including photo studies combined with POD analysis, resistance tests, wave elevation measurements with both acoustic and servo-type wave probes, and velocity field measurements with a 5-hole pitot probe. Three different CFD solvers, i.e., Fluent, naoe-FOAM-SJTU, and CFDShip-Iowa, are used for the numerical study of the unsteady KCS bow wave breaking with quantitative comparisons on forces, wave elevation, and velocities for two scaled ship models. Photographic studies of both models indicate that the intensity and area of the breaking interfaces in terms of RMS values increase with the trim angle. Two evident scars are identified visually from the high-speed camera photos and quantitatively from the wave elevation measurements at the most violent Case C (1° by bow). Significant differences between acoustic and servo-type wave probes on RMS and FFT of wave elevations are observed. The servo-type wave probes allow better identification of the inner scar along the hull, which is evident in photographic studies, and are more reliable for unsteady wave elevation measurements. Scale effects on wave breaking are investigated with both EFD and CFD. The large-scale model shows more violent plunging wave breaking and sprays, where larger RMS of the wave elevation in the wave breaking region can be observed. The difference in velocity under the free surface cannot be identified based on the present CFD results.

Keynote Presentation 7  15:00-15:45

Brief CV of Invited Speaker:

Dr. Eugenio Oñate is a Civil Engineer and Emeritus Professor of Structural and Continuum Mechanics at the School of Civil Engineering in the Technical University of Catalonia (UPC, www.upc.edu). His research has focused on the development of numerical methods for solving problems in structural mechanics, fluid dynamics and coupled situations in engineering sciences. His scientific contributions are of particular relevance for solving complex multidisciplinary problems in the fields of civil, industrial, aerospace, marine and naval engineering, among others. He has supervised 70 PhDs (completed). He has supervised the career towards tenure of 49 PostDocs. He has published 498 articles in JCR journals. He has 33.300 citations and an h-index of 85 (Google Scholar). He is the highest cited civil engineer in Spain. He is author of 2 text books and editor of 3 international Book Series and of 57 books on different topics of computational mechanics. He is editor of the JCR journals "Archives of Computational Methods in Engineering" (since 1994, Springer), “Computational Particle Mechanics” (since 2014, Springer) and "Métodos Numéricos para Cálculo y Diseño en Ingeniería" (since 1985, Scipedia). He was founder of CIMNE (www.cimne.com) in 1987 and its and Director up to May 2022. He was founder and first president of the Spanish Society of Numerical Methods in Engineering (1989–2004), founder and president of the European Community for Computational Mechanics in Applied Sciences (2000–2004) and president of the International Association for Computational Mechanics (2002-2010). He has received numerous awards, distinctions and honorary degrees at international level. He is the Scientific Director of the research programme of the Severo Ochoa Center of Excelence in Research awarded to CIMNE for the period 2020-2023. He has organized and chair/co-chair 58 scientific conferences worldwide. He has promoted the creation of several technology-based companies in Spain. Five of these companies’ market software and products derived from outcomes of his research. More information in www.cimne.com/eo.

Abstract:

We present advances in the development and applications in Computational Marine Hydrodynamics of a new generation of numerical methods based on the blending of an enhanced discrete element method (DEM) for non-cohesive and cohesive materials with an innovative combination of particle-based techniques and finite element/finite volume methods (PFEM). The hereafter called PDFEM allows the study of particulate flows incorporating particles of different sizes and their interaction with ships and marine structures. The goal is to solve particulate fluid-solid-structure interaction problems at the scales that are necessary for accurately predicting the response and safety of ships and marine constructions under different sea conditions. In the talk we present advances in the PDFEM for studying the frictional contact between a particulate flow and deforming structures, surface erosion and multi-fracture situations in a structure under particulate flows incorporating micro, meso and macro particles. We present examples of application of the PDFEM to particulate flow problems in naval, marine and harbour engineering such as the stability of breakwaters to sea waves, the motion of floating/submerged bodies in tsunami flows and their interaction with structures, lean edge erosion of wind turbine blades due to raindrops, underwater drilling and cuttings transport in the oil/gas industry and the motion of vessels in icy waters, among others.

Brief CV of Invited Speaker:

Prof. David LE TOUZÉ is 46 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 got his PhD with honors in 2003, whose topic was modeling gravity wave generation and propagation by spectral methods. He spent 2 years of post-doc at CNR-INM (Rome, Italy) in 2004-05 where he started working on the SPH method. He became Assistant Professor of Ecole Centrale Nantes in 2007, then Associate Professor in 2010 and Full Professor in 2012. His researches revolve mainly around free-surface flows. From 2012 to 2021 he led a 30-staff research group on Hydrodynamics, Interfaces and Interactions (H2i). Since 2022 he is the Director of the research Laboratory on hydrodynamics, energetics and atmospheric environment (LHEEA) which is a joint research unit of Ecole Centrale Nantes and CNRS. His research topics cover different numerical methods and techniques: SPH, incompressible (OpenFOAM) and weakly-compressible Finite Volumes, Adaptive Mesh/Particle Refinement, Immersed Boundary Method, Vortex Method, Lattice-Boltzmann Method. He is also working on different method couplings: potential flow (waves) to Navier-Stokes Finite Volume Method for wave-structure interactions, SPH to Finite Element Method 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, automotive and health (cardio-vascular flows) engineering. He is the author of ~75 journal publications. He was awarded twice the Joe Monaghan prize together with his Italian colleagues of CNR-INM. He is also a former Chair of the SPHERIC international community.

Abstract:

The Smoothed Particle Hydrodynamics (SPH) method development is rapidly expanding, with the majority of applications focused on geometrically complex free-surface/interface flow, potentially involving multi-physics. This particle method based on evaluating space differential operators on a scattered set of calculation points representing macroscopic fluid elements, raises theoretical and numerical issues mainly linked to its meshless and Lagrangian features which are rather unusual in hydrodynamics numerical modeling. Current progress on its theoretical and numerical development is examined, and the links with convergence and accuracy are discussed. This permits to highlight the current successful SPH schemes, their accuracy, efficiency, limitations and target types of applications. The interest and feasibility of coupling to other methods is also highlighted.

Keynote Presentation 10  17:15-18:00 (Jan. 14, 10:15-11:00 Germany Time)

Brief CV of Invited Speaker:

Dr. Yuan Zhuang, CMHL, Shanghai Jiao Tong University, Email: nana2_0@sjtu.edu.cn

Dr. Zheng Ma, Editorial Board, Journal of Hydrodynamics (JHD), Email: mazh8888@sina.com

Mr. Wei Liu, China Ship Scientific Research Center (CSSRC), Email: liuwei@cssrc.com.cn