Coefficient of friction due to water

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Discussion Overview

The discussion revolves around the coefficient of friction for a submarine moving through water, specifically addressing whether a universal value exists and how to calculate it. The scope includes concepts from fluid dynamics and the complexities involved in determining friction in a fluid medium.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant seeks a universal coefficient of friction for a submarine in water and expresses a desire for a straightforward answer suitable for their educational level.
  • Another participant suggests that the problem is complex and not a simple friction issue, indicating it relates more to fluid dynamics.
  • A third participant clarifies that the relevant factor is viscosity rather than friction, emphasizing the distinction between solid-solid friction and fluid dynamics.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the existence of a universal coefficient of friction for water, and the discussion reflects differing views on the nature of the problem, with some emphasizing its complexity.

Contextual Notes

The discussion highlights the limitations in finding a straightforward answer due to the complexities of fluid dynamics and the need for a deeper understanding of viscosity.

Who May Find This Useful

Students and individuals interested in fluid dynamics, particularly those exploring the concepts of friction and viscosity in relation to objects moving through fluids.

spri4
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I wasnt able to find anything on the internet, so maybe someone else can help. I need to know the coeifficient of friction due to water. Like say a submarine is being pulled by something through the water and what i need to know is what would the friction be for the submarine (if there is a universal number for friction by water) or how to solve for it. I am in 11th grade so hopefully the answer isn't too complicated.
 
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Thats going to be next to impossible for you to find. Its not a simple friction problem, but a complicated fluid dynamics problem. This is a very, very, very, tough problem.
 
Hi spri4! Welcome to PF! :smile:

Basically, friction is where the thing you're rubbing against stays where it is.

But when you move through a fluid (treacle, water, air, …), you drag some of the fluid with you. That's called viscosity, of course.

You need the viscosity, not the friction! :smile:

(You could try: http://en.wikipedia.org/wiki/Viscosity - but I don't recommend it! :smile:)
 
Thanks.
 

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