- #1

whiskydelta

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Heya, I'm new here and really need help!

So I'm having trouble with the *Buckingham Pi Theorem*.

I think I've got the jist of it bar one thing...So you have a bunch of variables e.g a force, velocity, denisty, length, viscosity, speed of sound:

f(F, V, roh, L, mu, a)

Do the (N variables - M fundamental dimentions):

6-3=3

to get the number of parameters:

pi1 pi2 pi3

How do know/determine which are the reoccuring variables:

eg.

pi1 = f(roh, V, L, F)

pi2 = f(foh, V, L, mu)

pi3 = f(roh, V, L, a)

How do you know/determine which of the variables within each parameter doesn't go to the power of a letter (where the letters are exponents to be found)?

eg. pi1 = roh^c V^d L^e F

I hope this makes sense :)

Thanks

So I'm having trouble with the *Buckingham Pi Theorem*.

I think I've got the jist of it bar one thing...So you have a bunch of variables e.g a force, velocity, denisty, length, viscosity, speed of sound:

f(F, V, roh, L, mu, a)

Do the (N variables - M fundamental dimentions):

6-3=3

to get the number of parameters:

pi1 pi2 pi3

**BUT**How do know/determine which are the reoccuring variables:

eg.

pi1 = f(roh, V, L, F)

pi2 = f(foh, V, L, mu)

pi3 = f(roh, V, L, a)

**AND**How do you know/determine which of the variables within each parameter doesn't go to the power of a letter (where the letters are exponents to be found)?

eg. pi1 = roh^c V^d L^e F

I hope this makes sense :)

Thanks

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