Aerodynamic analysis of a C-class-like catamaran in simplified unsteady wind conditions using LES and URANS modeling

- A numerical analysis on a C-class-like geometry is performed in unsteady wind conditions at different wind frequencies.
- LES and URANS models agree in predicting the global aerodynamic coefficients as well as the flow structures of the wingsail.
- Stall cells appear on the wingsail in case of unsteady wind conditions and their features depend on wind frequency.
- The wind frequency, affecting the stall cells, leads to a modification of the aerodynamic coefficients of the wingsail.