Bernoulli Effect & Friction: Lift Away Slower Interfaces?

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    Bernoulli Friction
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SUMMARY

The discussion centers on the Bernoulli effect, specifically its relationship with friction and viscosity in fluid dynamics. It is established that the Bernoulli principle applies exclusively to non-viscous flow, meaning that friction, defined as the interaction between different materials, does not influence this effect. Participants seek further information on Bernoulli pressure sensors and measurements related to bubble size variation in a venturi, highlighting the complexities of fluid behavior in varying conditions.

PREREQUISITES
  • Understanding of fluid dynamics principles
  • Familiarity with Bernoulli's equation
  • Knowledge of viscosity and its effects on fluid flow
  • Basic concepts of pressure measurement techniques
NEXT STEPS
  • Research Bernoulli's equation and its applications in fluid dynamics
  • Explore the effects of viscosity on fluid flow
  • Investigate pressure measurement techniques, specifically Bernoulli pressure sensors
  • Study bubble dynamics in venturi systems through experimental reports or videos
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Students and professionals in fluid dynamics, engineers working with fluid systems, and anyone interested in the principles of pressure measurement and fluid behavior.

John Laud
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Is nothing of the Bernoulli effect due to friction? Passing fluid trying to lift away a slower interface?
 
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Welcome to PF!

Hi John! Welcome to PF! :smile:
John Laud said:
Is nothing of the Bernoulli effect due to friction? Passing fluid trying to lift away a slower interface?

"Friction" in fluids is viscosity (the difference being that friction involves one material leaving the other material behind, while viscosity involves one material dragging some of the other material along with it).

The Bernoulli effect (or Bernoulli's equation or the Bernoulli principle) applies only to non-viscous flow …

see eg http://en.wikipedia.org/wiki/Bernoulli_effect :smile:
 
Thank you, tiny-tim, for doing my home work. And I struggled through the link you provided.

OK, no friction because wrong word, and no viscous effects because not allowed. So, what sort of Bernoulli pressure sensor doesn't have viscous contamination exactly at its business end?

Can anybody give a link to a report of measurement of bubble size variation as the bubbles pass through a venturi? A YouTube video would be even better.

Another guy staggered by Bernoulli and lift among other aspects of the physical universe - John
 

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