The Key Laboratory for Mechanics in Fluid Solid Coupling Systems (LMFS) is an important institution for technological innovation at the Institute of Mechanics. Fluid-solid coupling occurs extensively in both natural phenomena and engineering systems. Mechanics of fluid-solid coupling is the study of the interaction laws between fluids and solids. It is an interdisciplinary field that bridges various branches of mechanics, including fluid mechanics, solid mechanics, and other major disciplines.

Adhering to Qian Xuesen’s concept of “engineering science”, the laboratory closely aligns with the significant needs of various application areas, such as marine engineering, environmental engineering, and transportation engineering in China. Drawing upon the interdisciplinary integration of different branches of mechanics, the laboratory focuses on developing fundamental theories of mechanics in fluid-solid coupling systems and establishing distinctive and comprehensive experimental platforms and numerical simulation techniques. By leading the development of relevant engineering technologies, the laboratory aims to promote the advancement of research ideas and methodologies in the field of mechanics.

LMFS focuses on four key areas: (1) the interaction between fluids and engineering structures; (2) the interaction between fluids and soil materials; (3) environmental flow and multi-process coupling; and (4) the interaction between oil, gas, water, and sediments. Over the years, LMFS has significantly contributed to marine oil and gas production, transportation, separation technologies, advanced waterborne vehicles, watershed water environment and regional sedimentation, landslide monitoring, and aerodynamic effects on high-speed trains. We have established a high-caliber research team with strong cohesion and cooperation spirit. Meanwhile, relying on independent innovation, we have developed supporting experimental apparatus and built large-scale numerical simulation platforms and software.

The laboratory is dedicated to advancing new research concepts in system mechanics and providing novel analytical tools, transformative technologies, and comprehensive solutions to address engineering and technical challenges. We aim to make fundamental, strategic, and forward-looking contributions to national security, the economy, and social development.