services

Commercial + Motor Yachts

Accurate Results with Fast Turnaround

Doyle CFD uses high resolution simulation data to optimize designs for commercial vessels and motor yachts to improve aerodynamics, hydrodynamics and structural properties. Our analysis is driven by data from state-of-the-art Computational Fluid Dynamic (CFD) and Finite Element Analysis (FEA) simulations.  We use RANS CFD for both aerodynamic and hydrodynamic calculations.  RANS CFD not only predicts surfaces forces but also models the full three-dimensional flow field around the objects. We can solve structural or fatigue related problems using static loads, or import CFD forces into FEA models.  We can model virtually any commercial marine structure whether metal or composite.  Recent projects that we have done range from determining the required engine power for a 70’ custom catamaran, to a demonstration of fatigue analysis on a composite Coast Guard Cutter.

 

Hydrodynamics

Using RANS VOF CFD we are able to evaluate wave making forces and viscous effects like flow separation.  By using RANS CFD we are able to accurately evaluate how a design will perform without tow tank testing.  RANS CFD also allows us to examine the flow beneath the water surface which is difficult to see with tow tanks.  With our iterative computational design process, we are able to determine drag and other forces on the hull in different sea states and vessel velocities.  We are also able to evaluate how well a vessel will track, the overall stability of the vessel, and the effectiveness of appendages like bilge keels.

 

Aerodynamics

Our turbulent flow RANS CFD technology can be used to produce accurate wind tunnel-like force data. We frequently use aerodynamic RANS CFD to analyze the sails on sailing yachts, but we also use it to analyze the aerodynamic forces and flow fields around hulls and superstructures of commercial vessels and motor yachts.  The detailed flow fields produced by the RANS simulations can be used to study topics such as exhaust gas flow patterns.  When studying flexible structures subject to wind loads our CFD simulations can be linked to FEA simulations to preform aeroelasatic calculations. 

 

Structural Analysis

We can analyze and assist with the design of the overall structure of a vessel or its individual components.  Using CFD, we can obtain pressure and inertial loads due to the vessel’s motion in any sea state. Coupling those results with our FEA analysis, we are able to determine stresses and strains throughout the vessel. These results allow you to minimize weight and material cost, while maintaining proper factors of safety.  Many of the commercial structures we work with our made from composites.  We have developed an in-house laminate code to accurately determine the properties of complex composite parts. Combining accurate laminate lay-up properties with FEA allows us to accurately model and optimize laminate structures.

 

 

Animation

Our advanced rendering and animation capabilities are used to visualize complex data, illustrate design concepts and create stunning marketing materials. We combine our experience as sailors, engineers and artists to bring your designs and our analysis to life. Ask about our licensing or for-purchase rendering packages. These can be completed for existing or past projects as well.