Adhesive Forces: Bigger vs. Smaller Straws

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SUMMARY

The discussion centers on the relationship between adhesive forces and straw diameter, specifically comparing smaller and larger straws. It is established that the adhesive force is greater in larger tubes than in smaller ones at the top. Consequently, it requires less energy to extract fluid from a smaller straw due to the reduced adhesive force. This conclusion directly contradicts the initial query regarding the energy required for fluid extraction in different straw sizes.

PREREQUISITES
  • Understanding of adhesive forces in fluid dynamics
  • Basic knowledge of capillary action
  • Familiarity with the principles of gravity and fluid mechanics
  • Concept of energy expenditure in fluid extraction
NEXT STEPS
  • Research the principles of capillary action in various tube diameters
  • Explore the effects of adhesive and cohesive forces on fluid dynamics
  • Study the relationship between fluid viscosity and energy requirements in extraction
  • Investigate applications of adhesive forces in engineering and design
USEFUL FOR

Students and professionals in physics, fluid mechanics, and engineering, as well as anyone interested in the practical applications of adhesive forces in everyday scenarios.

Dion
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Is the adhesive force greater in a smaller tube then a bigger tube at the top?

So would it take more energy to take out water at the top of the straw from the thinner straw?

Or would, due to gravity cancelling eventually the capillary rising, the adhesive force at the very top of the straw is equal to a thicker tube at the very top?

Thanks in advance
 
Physics news on Phys.org
Dion said:
Is the adhesive force greater in a smaller tube then a bigger tube at the top?
No, to other way around.
 
A.T. said:
No, to other way around.
So it takes less energy to take the same amount of fluid out of the smaller tube?
 

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