Proving Poiseuille's Equation for Pressure Drop

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Homework Help Overview

The discussion revolves around proving Poiseuille's equation for pressure drop in laminar flow through a cylindrical tube, specifically the formula ΔP=(8QμL)/π(r)^4. Participants are exploring the mathematical and conceptual foundations required for this proof, while adhering to specific constraints regarding the use of dimensional analysis.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the need for advanced mathematical tools, such as Taylor Series, to approach the proof. Some express a desire to focus on specific topics within Mechanics of Continuous Media, indicating a limited time to study broader fluid dynamics concepts.

Discussion Status

There is an ongoing exploration of the proof's requirements, with some participants sharing their prior knowledge and expressing gratitude for resources that clarify the proof without extensive background material. However, no consensus has been reached on a specific method or approach to the proof itself.

Contextual Notes

Participants have noted constraints such as time limitations and the specific request to avoid dimensional analysis in the proof. There is also mention of varying levels of understanding of fluid dynamics among participants.

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Homework Statement



Prove that pressure drop (ΔP) of a fluid, in laminar flow, through a cylindrical tube is given by
ΔP=(8QμL)/π(r)^4
where

Q = volumetric flow rate
μ = viscosity,
L = tube length, in
R = tube radius, in

Homework Equations


please do not use dimensional analysis to prove.


The Attempt at a Solution

 
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I have decent knowledge of taylor series.
Apart from "Mechanics of Continuous Media",i have good understanding of other undergraduate physics topics as well.
I do not have enough time to go through the whole of fluid dynamics.
i want to know only 3 things in Mechanics of Continuous Media
(a) proof of stokes's law,poiseuille equation,elastic constants and their inter-relation.
please help with these topics.
 
I have decent knowledge of taylor series.
Apart from "Mechanics of Continuous Media",i have good understanding of other undergraduate physics topics as well.
I do not have enough time to go through the whole of fluid dynamics.
i want to know only 3 things in Mechanics of Continuous Media
(a) proof of stokes's law,poiseuille equation,elastic constants and their inter-relation.
please help with these topics.
 
NOw i know the proof of stokes's law,poiseuille equation.
I never believed that the proof would be such a general one(u only need to know Newton's law).
All book except one(physical fluid mechanics by d.j tritton)were providing proof after digging into 100s of pages of fluid dynamics .
thanks D.J TRITTON
thanks you as well, even for not helping me.
 

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