COSMOS FloWorks Wind Tunnel Simulation ME143 Fall 2006 J. Cho B. Wilson.

COSMOS FloWorks Wind Tunnel Simulation

ME143 Fall 2006

J. Cho

B. Wilson

COSMOS FloWorks Tutorial

• Build a part– Car Body– Wing Shape– Entire Aircraft

• Select Simulation Parameters– Fluid– Fluid Velocity

• Run Simulation• View Results


• Draw a part in SolidWorks


• Execute FloWorks Add-In– Tools > Add-Ins


• Start New Simulation– FloWorks > Project > Wizard


• Set Simulation Units System


• Choose Flow Type– Internal: Pipes, Ducts, etc…– External: Flow over surfaces


• Choose Fluid


• Set Surface Conditions


• Set Initial Conditions– Flow Velocity and Direction– Initial Pressure and Temperature


• Set Simulation Accuracy– More Accuracy = More Simulation Time


• Size the Computational Domain– FloWorks > Computational Domain


• Run Solver– FloWorks > Solver > Run


• Wait for Solution to be Computed– Depending on geometry and accuracy, simulation

time can be several hours


• Solver Window– Completed Simulation


• Insert Flow Trajectories– Results > Flow Trajectories > Insert– Export Images and Video


• Results Image


• Results Animation• Click image to Animate

Wind Tunnel Comparisons

• Air Foil– Horizontal– Inclined 20 degrees

• 1969 Chevrolet Camaro– 30 mph– 60 mph


• Airfoil Image (Horizontal Position)


• Airfoil Animation (Horizontal Position)• Click image to Animate


• Airfoil Results (Horizontal Position)– Low pressure zone on top of foil produces lift.– Laminar air flow over entire profile.


• Airfoil Image (20° Incline)


• Airfoil Animation (20° Incline)• Click image to Animate

Wind Tunnel Results

• Airfoil Results (20° Incline)– 20° incline increases surface area.

• More pressure is developed at bottom of airfoil, producing higher lift capabilities for take offs and in-flight maneuverability.


• 1969 Chevrolet Camaro (30mph)


• 1969 Chevrolet Camaro (30mph)• Click image to Animate


• 1969 Chevrolet Camaro (60mph)


• 1969 Chevrolet Camaro (60mph)• Click image to Animate

Wind Tunnel Results

• 1969 Chevrolet Camaro Results

• Front vehicle geometry (front spoiler)– Improves aerodynamics

• Rear spoiler provides a downward force– Keeps vehicle on ground at high speeds

Conclusion

• Cosmos FloWorks– All simulation data is exportable in Excel

format or preformatted “Word” documents.– Flow profile are easily examined for

turbulence.– Multicolored pressure lines easily display

pressure differentials.– All fluid properties and flow parameters are

adjustable.• Fluid information is included in program.

COSMOS FloWorks Wind Tunnel Simulation ME143 Fall 2006 J. Cho B. Wilson.

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