Renormalization in Fluidodynamics

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SUMMARY

Renormalization in fluid dynamics, as discussed by Alain Connes, highlights the limitations of Archimedes' Law in calculating the acceleration of a ball submerged in a liquid. Green's 1850 work introduced mass renormalization to address discrepancies when applying Newton's law (F=ma) to objects in fluids. The interaction of the ball with surrounding fluid creates hydrodynamic currents that effectively alter its inertia, necessitating a more complex approach to accurately predict its behavior. Further quantitative references are sought to deepen understanding of these calculations.

PREREQUISITES
  • Understanding of Archimedes' Law
  • Familiarity with Newton's laws of motion
  • Basic knowledge of fluid dynamics
  • Concept of mass renormalization in physics
NEXT STEPS
  • Research "mass renormalization in fluid dynamics" for detailed methodologies
  • Study "hydrodynamic interactions in fluid mechanics" to understand fluid behavior around objects
  • Explore "Green's functions in physics" for historical context and applications
  • Investigate "quantitative methods in fluid dynamics" for practical calculation techniques
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Physicists, fluid dynamics researchers, and students seeking to understand the complexities of object behavior in fluids and the implications of renormalization techniques.

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During a lecture about QFT (http://video.google.it/videoplay?docid=-8230150359736309141&ei=xFWDSNSiDITgjAKz46i3Bg&hl=it" ) Alain Connes said that Green (in1850) used a mass renormalization to calculate the acceleration of a ball in a liquid, because you can't directly calculate it just using Archimede's Law. I didn't understand It very well. So does anybody know a reference or where to find this kind of calculation?

Thank you.
 
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random3f said:
During a lecture about QFT (http://video.google.it/videoplay?docid=-8230150359736309141&ei=xFWDSNSiDITgjAKz46i3Bg&hl=it" ) Alain Connes said that Green (in1850) used a mass renormalization to calculate the acceleration of a ball in a liquid, because you can't directly calculate it just using Archimede's Law. I didn't understand It very well. So does anybody know a reference or where to find this kind of calculation?

Thank you.

Hello,

I don't know where to find such a calculation but I can explain the reason why it has to be done. Actually Connes talks about a ping pong ball that would be immerged into water because we are holding it for example and then we let it go. The archimede's law applies then and the ball feels a strength that repels it to the surface of water.
The fact is that when you try to compute the acceleration by applying Newton's law F=ma, you don't find the experimental result. The reason is that, when an object is moving in a fluid it induces hydrodynamics currents around itself which modify, in an effective way, the ball inertia in Newton's law. I will try to find a more quantitative reference in the next few days...

P.S : excuse me for my english
 
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