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# Deriving stokes law - Help please! watch

1. (Original post by Squishy)
It's part of my first-year course, although not my main focus (computer science).
do you do physical modelling, in that case?
2. (Original post by Squishy)
Good luck .
3. (Original post by elpaw)
do you do physical modelling, in that case?
It's not on the first-year course...I'm supposed to study Physics to broaden my first year...I don't think it's supposed to be related to the main subject.

(Original post by Nylex)
Good luck .
Thanks. (3 weeks to go now)
4. (Original post by Squishy)
Thanks. (3 weeks to go now)
No prob. I applied, but didn't make it past the interviews, hehe.
5. (Original post by Nylex)
No prob. I applied, but didn't make it past the interviews, hehe.
Having seen the workload for next year, I'd say you were lucky.
6. Bernoulli's Equation is basically the law of energy conservation applied to incompressible, inviscid flow along a streamline.

Stokes Law for Drag on a Sphere relates the drag coefficient to the Reynolds Number (Re) within the range Re < 1. The Reynolds Number is the ratio of inertial to viscous forces.

7. Thats nice of you to help Shiny, but that is WAY beyond Alevel. However, if you could explain the concept of laminar and turbulent flow through a tube to me, that would be great! I want to know why one will result in a different velocity...
8. (Original post by RobbieC)
Thats nice of you to help Shiny, but that is WAY beyond Alevel. However, if you could explain the concept of laminar and turbulent flow through a tube to me, that would be great! I want to know why one will result in a different velocity...
I presume you are talking about the loss of pressure through a pipe?

Laminar flow - smooth flow, low loss.
Turbulent flow - likes it sounds is turbulent, lots of eddies and internal mixing, which results in energy dissipation and loss of pressure.

EDIT: Or do you mean differences in velocity profiles?
9. (Original post by shiny)
I presume you are talking about the loss of pressure through a pipe?

Laminar flow - smooth flow, low loss.
Turbulent flow - likes it sounds is turbulent, lots of eddies and internal mixing, which results in energy dissipation and loss of pressure.

EDIT: Or do you mean differences in velocity profiles?
Velocity profiles.

Ive decided to do a project where I investigate the difference in the viscosity coefficient at different temperatures.

I was just curious for bg info purposes as to how turbulent flow would prevent a stable equilibrium... Its not clear in my mind.
10. (Original post by RobbieC)
Velocity profiles.
It is pretty much the same reasons as for pressure loss. Turbulent flows have a unsteady velocity components which causes mixing and momentum transfer between fluid layers. Consequently a turbulent velocity profile has a steeper velocity gradient near the pipe wall than a laminar flow where there is little momentum transfer between layers (since there is much less flow instability).

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