How to Calculate Centrifugal Force on a Spinning Droplet?

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    Centrifugal Forces
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Discussion Overview

The discussion revolves around calculating the effect of centrifugal force on a spinning droplet, particularly focusing on how to apply the formula for centrifugal force to individual cells within the droplet. Participants explore the challenges of this calculation and seek a general approach based on properties like density or viscosity.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant proposes using the formula F = Mass * angular velocity square * radius to calculate centrifugal force but expresses difficulty in applying it to individual cells of the droplet.
  • Another participant questions the meaning of "big number" and requests to see the working calculations to better understand the issue.
  • A participant suggests that the mass of the water within each cell and the corresponding radius should be considered in the calculations.
  • One participant mentions having an equilibrium between centrifugal force and surface tension, noting discrepancies in the expected values, indicating potential issues with the underlying principles used.
  • Several participants express uncertainty about identifying the source of the problem without more detailed information.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the correct approach to calculating centrifugal force for the spinning droplet, and multiple competing views and uncertainties remain regarding the calculations and principles involved.

Contextual Notes

Limitations include a lack of detailed calculations and assumptions about the mass distribution within the droplet, as well as the dependence on definitions of centrifugal force and surface tension.

Ameer Alhilo
hello everyone
I have spinning droplet. I want to calculate the effect of centrifugal force on each cell of the droplet.
If I use

F= Mass * angular velocity square * radius

That gave big number and it is like the whole droplet rotation around that radius. It's looks easy but I really stuck with it

Regards
 
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Cell in a lattice simulation? Did you use the mass of the water within that cell and the corresponding radius?
If the mistake is somewhere else, it is hard to tell where with the given information.
 
What does "That gave a big number" mean? Show your working?
 
mfb said:
Cell in a lattice simulation? Did you use the mass of the water within that cell and the corresponding radius?
If the mistake is somewhere else, it is hard to tell where with the given information.
thanks for respond
it's hard to find and calculate for each cell. so I am looking for a general way to calculate that effect my be base on density or viscosity?
 
CWatters said:
What does "That gave a big number" mean? Show your working?

thanks for respond
l have equilibrium between centrifugal force and surface tension. while the first between 1 and 2 the second around 0.03 to 0.04. so there is something wrong in the principles!
 
With the given information I don't see how we could figure out what went wrong.
 

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