Sailing Dynamics

SNIC 2018/3-102


SNAC Medium

Principal Investigator:

Lars Larsson


Chalmers tekniska högskola

Start Date:


End Date:


Primary Classification:

20303: Vehicle Engineering

Secondary Classification:

20306: Fluid Mechanics and Acoustics



Since 2015 Chalmers is a National Sports University with obligations to carry out research within Sports and Technology. Three areas have been selected: sailing, swimming and equestrian. This proposal is within sailing. Focus is on Olympic sailing, which is presently only done in dinghies. In a dinghy the sailor weight is similar to that of the boat. Therefore the positioning and motions of the sailor in the boat have a profound influence on the hydrodynamics and aerodynamics of the dinghy. The present project aims at optimizing the sailor position and motions in Olympic dinghies both in flat water and in waves. This is an extremely complicated problem, including unsteady hydrodynamics and aerodynamics, coupled to rigid body motions and with fluid-structure interaction for the rig and sails. The first version of a numerical technique for sailing yacht performance prediction based on Computational Fluid Dynamics, strongly coupled to 6D rigid body dynamics is under development. The first version was presented in a Licentiate thesis in late 2016 and has been further developed in 2017. More and more features will be included during the coming years. At present two PhD students are engaged in the sailing research. Their progress is strongly dependent on the SNIC resources. Further, in the spring of 2018 there are three MSc projects going on in sailing. All three require massive computer resources, and will rely on SNIC. In 2017 the research generated two journal papers and four conference papers. In 2018 three journal papers are expected, as well as one invited lecture at an international conference. The sailing activities are coordinated under Chalmers Yacht Research Unit (CYRU)