Fluid Mechanics - Linear Momentum

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SUMMARY

The discussion centers on the application of Bernoulli's equation and the continuity principle in solving problems related to linear momentum in fluid mechanics. Participants express difficulty in determining the mass flow rate and correctly identifying external and surface forces acting on the fluid. The conversation highlights the challenges faced by students, particularly in the context of exam preparation at UNSW.

PREREQUISITES
  • Understanding of Bernoulli's equation
  • Familiarity with the continuity principle in fluid dynamics
  • Knowledge of mass flow rate calculations
  • Concepts of external and surface forces in fluid mechanics
NEXT STEPS
  • Study the derivation and applications of Bernoulli's equation
  • Explore the continuity equation and its implications for fluid flow
  • Research methods for calculating mass flow rate in various fluid systems
  • Investigate the effects of external and surface forces on fluid behavior
USEFUL FOR

Students of fluid mechanics, particularly those preparing for exams, as well as educators and professionals seeking to deepen their understanding of linear momentum and fluid dynamics principles.

EmmaJ
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I know the equation for conservation of linear momentum, and Bernoulli's equation:
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So I've tried using Bernoulli's equation to find V1, then use the continuity principle to find V2, but then I get stuck on the mass flow rate.

I tried a different approach by trying to convert mass flow rate and velocity into variables I know, such as density, A1 and A2 but I think really I'm just stuck in correctly identifying the external (body) forces on the fluid and the surface forces on the fluid.

Many thanks for any help offered!

Emma
 
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I'm stuck on this very same question... any help?
 
You go to UNSW? Still haven't worked it out...I'll just hope it's not in the final!
 
Ha ha yeah i do. I'm thinking this question is a bit too nasty for an exam
 

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