Yonghwan Kim

Seoul National University, Korea

44th Georg Weinblum Memorial Lecture (2023/24)

Prediction of Ship Hydrodynamic Performance in Waves

Short Biography

Yonghwan Kim is professor at the Seoul National University (SNU) in the Department of Naval Architecture and Ocean Engineering. He is the head of the Marine Hydrodynamics Laboratory, and the director of Future Ocean Cluster and the Lloyd’s Register Foundation-Funded Research Center at SNU. He got his Bachelor and Master degrees at the Seoul National University and his PhD degree at the Massachusetts Institute of Technology (MIT). Before joining SNU, he worked at MIT, American Bureau of Shipping, and Daewoo Shipbuilding Co.

His research focus has been on seakeeping and sloshing, including the motion responses of ship and offshore structures in waves, ship structural hydroelasticity in waves, hydro-oriented design and simulation, seakeeping-manoeuvring coupling, model-scale sloshing experiments for ship cargo design, and ship operational digital twin. He developed the WISH software for the Korean industry, and a large experimental facility for ship sloshing. He has been strongly collaborating with the marine industry.

He is the fellow of RINA and SNAME, and a full member of the National Academy of Engineering of Korea. He was distinguished visiting fellow of the Royal Academy of Engineering and Southampton University, visiting professor of MIT, and specially-appointed professor of Osaka University. He served for many international organizations, conferences, and journals in marine engineering fields. He is currently the representative of the ITTC East-South Asia region and chair of the Working Group 3 in the ITTC. He is the Editor-in-Chief of Journal of Engineering for Maritime Environment and co-chair of the International Workshop on Water Waves and Floating Bodies.

He won the Korean award “Young Engineer Award” from the Korean National Academy of Engineering. Further on he got several Achievement and Academic Awards from the Korean Society of Ocean Engineers, and received the CH Kim Award of ISOPE.

Many of his publications have been awarded as best papers by academic societies including ISOPE, OMAE, and Korean Society of Naval Architects.


After the pioneering works of Georg Weinblum for ship hydrodynamics, various ship hydrodynamic problems have been tackled using mathematical, numerical, and experimental techniques. The primary goal of ship hydrodynamic research is to help the design of a ship that maximizes safety and efficiency in actual seaways. The hydrodynamic performance of a ship is directly related to the safety of passengers, cargo, hull structure, and onboard equipment.

In this lecture, some engineering problems related to the ship hydrodynamic performance in waves are addressed. Of particular interest are wave-induced added resistance, and seakeeping-manoeuvring coupled problems in waves. Methods of solution are both the potential theory and CFD, and the computational results are validated by comparing with the experimental data.

The research on added resistance has been extended to the development of an asymptotic formula for short wave range in which the diffraction component is dominant. An asymptotic formula has been developed for practical purpose, and its accuracy is proved by comparing computational and experimental data.

Finally, the lecture includes the recent application of digital technology to ship hydrodynamic problems. Particularly, the real-time digital twin system of ship operation is introduced. This system was designed to suggest a route that can maximize the safety and operation efficiency of a ship by predicting the ship performance in the present and short-term future. In this lecture, basic concepts, major technical elements, and application cases are introduced.

Additional Documents

Last update: September 2023