flow around oscillating cylinder

[gsunil]

can any one explain how to analyse about flow around

vibrating(harmonic) cylinder in fluid at rest,physically how it forms secondary steady flow

 

[GraviMan]

You'll need to bone up on Navier stokes, since there is a time dependant term. Not for the faint hearted, since you need vector calculus (about cylindrical polar coords, in this case). The Open University (

http://www.openuniversity.co.uk?)

are just winding up a very good course (MST 322) - you should be able to purchase old course material to do some homework...

Mart

 

[GraviMan]

BTW, I never understood what you meant by oscillating cylinder. Is this oscillating rotationally or up and down? Navier-Stokes could handle the first, but you need CFD for the second! (Hint: Navier-Stokes is a LOT easier in 2D)

You need to think carefully about boundary conditions too.

If you are asking how a rotating cylinder can cause a steady vortex formation - that's easy: centrifugal force...

Mart

 

[gsunil]

cylender is vibrating ina pnape either horizontally or vertically i want to know about physics of secondary stream