Computational Fluid Dynamics (CFD) Case Studies

DARcorporation CFD models grabbing attention!

DARcorporation's octocopter UAV/drone concept (left side of the ad) was selected by Siemens (formerly CD-adapco) to promote their STAR-CCM+ CFD software in their latest advertisement with DE magazine.

The same model won a contest and was selected by then-CD-adapco to appear in their 2016 calendar for the month of April.

Have a project that requires detailed aerodynamic ananlysis using CFD? Let us help you! Contact us to discuss how our CFD expertise can be of service.


DARcorporation engineers have been researching and testing propeller design methods to improve propeller performance for existing and conceptual commercial multicopters/drones. A 2-bladed propeller model was created using an in-house design code and analyzed in CFD. The simulations have modeled 2D and 3D streamlines and vorticity in three dimensions. An octocopter drone concept was also simulated to observe its behavior in forward flight. This image may look familiar because it was chosen as a winner by then-CD-adapco to appear on their 2016 calendar for the month of April.

Cessna 210J Centurion

DARcorporation engineers modeled and simulated a Cessna 210J Centurion to determine how the propeller affects the performance of the horizontal tail control surfaces. The first photo shows the total pressure contours on the surface of the aircraft and through the propeller. In the second photo, velocity-colored streamlines show the airflow passing through the propeller and around the fuselage. Simulations are completed for a full range of both angle of attack and sideslip angle to examine the effects of the propwash on the horizontal tail surfaces. Photo 3 shows velocity-colored streamlines and how the airflow passes through the propeller and acquires a tangential velocity prior to meeting the fuselage.

Pickup Truck with DragShield (patent-pending)

DARcorporation engineers modeled and simulated a 2011 GMC Sierra 1500 Extended Cab Pickup Truck for the purpose of researching drag reduction devices for such vehicles. The models include simulations of static pressure distribution and vorticity. Special CFD analysis was performed on a pickup truck spoiler designed by Brett Herndon to reduce the aerodynamic drag of the vehicle. The CFD analysis compared the net drag reducing effects of the spoiler installed on the truck versus a baseline model of the truck without the spoiler. Update (Dec. 1, 2017): DragShield was selected as one of the Top 100 Entries in the Create the Future 2017 Design Contest and presented with a Certificate of Achievement. Launched in 2002, Create the Future Design Contest was to help stimulate and reward engineering innovation from engineers, entrepreneurs and students worldwide.


DARcorporation engineers modeled and simulated a semi-trailer for the purpose of researching drag reduction devices for such vehicles. The simulation in the first photo shows static pressure on the aft end of the semi-trailer. The results of which are used as the baseline for testing drag reduction devices. The simulation in the second photo shows velocity contours over the semi-trailer which highlights the large wake that exists behind all semi-trailers. DARcorporation is researching various devices that will reduce the drag caused by these wakes by over 15%, which helps reduce fuel costs and emissions.