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

COSMOS FloWorks Tutorial

• Draw a part in SolidWorks

COSMOS FloWorks Tutorial

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

COSMOS FloWorks Tutorial

• Start New Simulation– FloWorks > Project > Wizard

COSMOS FloWorks Tutorial

• Set Simulation Units System

COSMOS FloWorks Tutorial

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

COSMOS FloWorks Tutorial

• Choose Fluid

COSMOS FloWorks Tutorial

• Set Surface Conditions

COSMOS FloWorks Tutorial

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

COSMOS FloWorks Tutorial

• Set Simulation Accuracy– More Accuracy = More Simulation Time

COSMOS FloWorks Tutorial

• Size the Computational Domain– FloWorks > Computational Domain

COSMOS FloWorks Tutorial

• Run Solver– FloWorks > Solver > Run

COSMOS FloWorks Tutorial

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

time can be several hours

COSMOS FloWorks Tutorial

• Solver Window– Completed Simulation

COSMOS FloWorks Tutorial

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

COSMOS FloWorks Tutorial

• Results Image

COSMOS FloWorks Tutorial

• Results Animation• Click image to Animate

Wind Tunnel Comparisons

• Air Foil– Horizontal– Inclined 20 degrees

• 1969 Chevrolet Camaro– 30 mph– 60 mph

Wind Tunnel Comparisons

• Airfoil Image (Horizontal Position)

Wind Tunnel Comparisons

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

Wind Tunnel Comparisons

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

Wind Tunnel Comparisons

• Airfoil Image (20° Incline)

Wind Tunnel Comparisons

• 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.

Wind Tunnel Comparisons

• 1969 Chevrolet Camaro (30mph)

Wind Tunnel Comparisons

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

Wind Tunnel Comparisons

• 1969 Chevrolet Camaro (60mph)

Wind Tunnel Comparisons

• 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.