A LHEEA article on fluid-structure interactions receives the Best Paper 2022 award from 'Engineering Analysis with Boundary Elements'

The article in question is: "Study of a complex fluid-structure dam-breaking benchmark problem using a multi-phase SPH method with APR", P.N. Sun (Ecole Centrale Nantes, LHEEA (ECN and CNRS), Nantes, France), D. Le Touzé (Ecole Centrale Nantes, LHEEA (ECN and CNRS), Nantes, France), A.M. Zhang (College of Shipbuilding Engineering, Harbin Engineering University, Harbin, China).

The research leading to this article's publication was the result of long-standing international collaboration between the LHEEA and CNR-INM (Institute of Marine Engineering in Italy) where PengNan spent half of his PhD, and more recently Harbin Engineering University which awarded PengNan his PhD. He then did a post-doc under the supervision of Prof. David Le Touzé in the IIHNE research group at the LHEEA between 2018 and 2020. PengNan is now an Associate Professor in China, at Sun Yat-Sen university in Zhuhai. His collaboration with the LHEEA continues to this day.
 

Abstract

The present work is dedicated to an accurate modeling of violent Fluid-Structure-Interaction (FSI) problems using a coupled Lagrangian particle method combining a multi-phase δ-SPH  scheme and a Total-Lagrangian-Particle (TLP) method. Advanced numerical techniques, e.g. Adaptive-Particle-Refinement (APR), have been included in the particle method for improving the local accuracy and the overall numerical efficiency. On one hand, this paper aims to demonstrate the capability of the proposed numerical method in modeling FSI flows with large density-ratios, strong fluid impacts, complex interfacial evolutions and considerable wall-boundary movements and deformations; On the other hand, the numerical results presented in this paper show the importance of considering the existence of air-phase in some complex FSI problems. The entrapped air-bubble, after the free-surface rolling and closing, plays an important role in the overall flow evolution and hence the hydrodynamic load on the structure. Although a density ratio as large as 1000 has been adopted, clear and sharp multi-phase interfaces, which undergo violent breakups and reconnections, are present in the numerical results, and more importantly, stable and smooth pressure fields are obtained. This contributes to an accurate prediction of the structural response, as validated by both the experimental data and other numerical results.

Read the article

https://hal.archives-ouvertes.fr/hal-02456356