How does differential pressure cause a flag to flutter?

[pras_quantum]

i understand there is a lot of aerodynamics here...but...can some one explain the aerodynamics in it?and how it creates differential pressure?

 

[Coto]

I'd actually like to see the discussion on this too.

I have a couple of ideas in mind and want to see if they match up.

 

[pras_quantum]

i guess..it has very deep aerodynamics..and deals with complex fluid dynamics as well..can anyone explain me with aero or fluid dynamics?

 

[Andy Resnick]

It is a very complicated problem, but there has been some really nice experimental work:

http://www.nature.com/nature/journal/v408/n6814/full/408835a0.html

http://www.pnas.org/content/102/6/1829.full

Flag flutter is an unstable state of motion, and IIRC is driven by vortex shedding.

 

[pras_quantum]

thanks for the link andy,it gave me a good perspective to think.