Shear Forces Explained: Hydraulic Jump

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Discussion Overview

The discussion revolves around the concept of shear forces in the context of hydraulic jump, a phenomenon observed in fluid dynamics. Participants explore the definitions and implications of shear forces and their relationship to cohesion forces, while also clarifying terminology related to hydraulic phenomena.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant seeks clarification on the nature of shear forces and their relation to hydraulic jump, specifically questioning if they are caused by cohesion forces.
  • Another participant expresses a lack of knowledge on the topic but offers a link that may provide helpful information.
  • A participant defines shear force as acting tangentially to a surface, distinguishing it from normal forces.
  • A later reply questions whether the original inquiry pertains to hydraulic jump or hydraulic hammer, suggesting a potential misunderstanding of terms.

Areas of Agreement / Disagreement

The discussion does not appear to reach a consensus, as participants express varying levels of understanding and introduce different terms related to hydraulic phenomena.

Contextual Notes

There may be limitations in the definitions provided, as well as potential confusion between hydraulic jump and hydraulic hammer, which could affect the clarity of the discussion.

Renato Rebouças
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Please, say me what are shear forces. I've been looking for it because I was studying a phenomenon called hydraulic jump. In this example, are these forces caused by the cohesion forces?
 
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I don't know any of this stuff myself, but I always sympathize with someone who has no resposes to a post. Maybe http://astron.berkeley.edu/~jrg/ay202/node17.html can help?
 
Last edited by a moderator:
A shear force per unit area (i.e, shear stress) acts tangential to a surface, rather than in the normal direction to the surface.
 
"Hydraulic jump?" You don't, by chance, mean hydraulic hammer?
 

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