Supporting Fluid: Reducing Shear Stress with Wall

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The discussion centers on the role of walls in reducing shear stress in fluids. It questions how the absence of a wall would lead to continuous fluid movement, resulting in shear stress. Participants express confusion over the original question and accompanying diagram, indicating a lack of clarity. The need for walls to support fluid and mitigate shear stress is emphasized as a critical concept. Overall, the conversation highlights the importance of understanding fluid dynamics in relation to boundary conditions.
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Homework Statement


why the fluid need the wall to eliminate the shear stress?

Homework Equations

The Attempt at a Solution


is it because if there is no wall to support teh fluid , the fluid would move continously , resulting the shear stress act on water?
 

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Here again, your question (and the accompanying diagram) does not make sense to me. Where did this diagram and caption come from?
 
Chestermiller said:
Here again, your question (and the accompanying diagram) does not make sense to me. Where did this diagram and caption come from?
i am asking about , if no wall is present , how can it not eliminate stress?
 
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