At the present time technology does not exist for accurately determining force coefficients for downwind sailing. Reynolds-Averaged Navier Stokes (RANS) simulation offers the potential of being a useful tool to help solve this problem. The basis of RANS is reviewed, and the results of computations for two-dimensional blocked flow normal to a flat plate are presented. Both quasi-steady and transient computations were performed. The quasi-steady computations provide excellent prediction of the effects of blockage on drag, while the transient simulations do a very good job of predicting the actual value of the drag. The application of the technology to realistic downwind sail configurations is discussed.
On the Application of RANS Simulation for Downwind Sail Aerodynamics
Lasher, William. "On the Application of RANS Simulation for Downwind Sail Aerodynamics." Paper presented at the SNAME 14th Chesapeake Sailing Yacht Symposium, Annapolis, Maryland, USA, January 1999. doi: https://doi.org/10.5957/CSYS-1999-012
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