Latest news

## When Turbulence Is Desirable

One of the common themes in aerodynamics, especially in sports applications, is that tripping the flow to turbulence can decrease drag compared to maintaining laminar flow. This seems counterintuitive, but Keep reading

## Sochi 2014: Speedskating Suits

Long track speed skating is a race against the clock. Skaters reach speeds of roughly 50 kph, so drag has a significant impact. This is why skaters stay bent and Keep reading

## Start Your Rocket Engine

When supersonic flow is achieved through a wind tunnel or rocket nozzle, the flow is said to have “started”. For this to happen, a shock wave must pass through, leaving Keep reading

## Those Funny Fins on Airplane Wings

Ever look out an airplane’s window and wondered why a row of little fins runs along the upper side of the wing? These vortex generators help prevent a wing from Keep reading

## Unsteady Rocket Nozzle

This numerical simulation gives a glimpse of flow inside an unsteady rocket nozzle.  The nozzle is over-expanded, meaning that the exhaust’s pressure is lower than that of the ambient atmosphere. Keep reading

## Magnus Force

Physics students are often taught to ignore the effects of air on a projectile, but such effects are not always negligible. This video features several great examples of the Magnus Keep reading

## Flapping Flags

The flapping of flexible objects like flags have long fascinated mankind. The figure above from Shelley and Zhang 2011 shows several possible flapping states.  In (a) a thread immersed in Keep reading

## London 2012: Running Aerodynamics

Running is not an event typically associated with aerodynamics, though any runner will tell you that a headwind can slow them down.  For comparison, a swimmer on world record pace Keep reading

## London 2012: Cycling Physics

In no discipline of cycling is more emphasis placed on fluid dynamics than in the individual time trial.  This event, a solo race against the clock, leaves riders no place Keep reading

## Stalling a Wing

At small angles of attack, air flows smoothly around an airfoil, providing lifting force through the difference in pressure across the top and bottom of the airfoil. As the angle Keep reading