Computational fluid dynamics performance evaluation of grooved fins for surfboards

In this paper, we used computational fluid dynamics simulation (ANSYS CFX) to compare the performance of surfboard fins with grooves (and a bumpy-leading edge) to conventional surfboard fins. The simulations predicted the performance of each type of fins in terms of hydrodynamic forces and their behavior for angles of attack up to 45 degrees. Our results indicated that the pressure contours around fins with grooves (and bumpy-leading edge) were lower compared to pressure contours around conventional fins. The grooved fins exhibited a 13 +/- 1% reduction in drag (coupled with a much smaller reduction in lift) at the stall angle, contributing to an overall 11 +/- 1% improvement in the lift-to-drag ratio compared to conventional fins.

Automated summary

In this paper, the performance of surfboard fins with grooves was compared to conventional surfboard fins using computational fluid dynamics simulation. The results showed that the grooved fins had lower drag and slightly lower lift at the stall angle, leading to an overall improvement in the lift-to-drag ratio compared to conventional fins.