Does Poiseuille's Law apply for vertical motion of fluids down a tube?

AI Thread Summary
The discussion revolves around the application of Poiseuille's Law to the flow rate of glycerol dilutions through a vertical tube. The original poster questioned whether their graph demonstrated an inverse proportion as expected by the law and sought clarification on the relationship between viscosity and glycerol concentration. They received suggestions to explore viscosity calculations to better understand the flow behavior. After making adjustments, the poster reported an improved graph, indicating progress in their investigation. The conversation highlights the complexities of fluid dynamics in vertical motion and the relevance of viscosity in these scenarios.
g9WfI
Messages
13
Reaction score
4
Homework Statement
N/A
Relevant Equations
See below
I investigated the flow rate of differing dilutions of glycerol through an orifice of a vertical tube and obtained the following:
1625006338200.png

I'm looking for a way to quantify these results so looked to Poiseuille's Law;
Screenshot 2021-06-29 at 23.40.27.png

I'm pretty sure my graph does not show inverse proportion? Could anyone advise me as to where I've gone wrong / if there is another law governing this relationship - does Poiseuille's Law apply for the vertical motion of fluids?
 
Physics news on Phys.org
haruspex said:
What makes you think the viscosity will be proportional to the fraction that's glycerol?
See if http://www.met.reading.ac.uk/~sws04cdw/viscosity_calc.html helps.
I see. I've got a much better looking graph now. Thanks a lot :)
 
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Back
Top