This course is discontinued


Published Nov. 27, 2008 2:30 PM

According to the "Tid og sted" under GEF4500:

Avsluttende skriftlig eksamen

4. desember kl. 14:30 (3 timer).

* Store lesesal, gr. 2 Vilhelm Bjerknes hus

Published Nov. 14, 2008 3:09 PM

I've reserved room 5 from 1-3 pm on Monday. I guess that must be somewhere near room 7...

Published Oct. 30, 2008 1:10 PM

In problem 2, you will need an additional constraint at the wall. In addition to psi=0, also use the no-slip condition--- that v=d/dx psi=0

Note that the general solution to

d^4 psi/dx^4 - d/dx psi = 0


psi = c1 + c2 exp(x) + c3 exp(-x/2) cos(sqrt(3) x/2) + c4 exp(-x/2) sin(sqrt(3) x/2)

while the solution to;

d^4 psi/dx^4 + d/dx psi = 0


psi = c1 + c2 exp(-x) + c3 exp(x/2) cos(sqrt(3) x/2) + c4 exp(x/2) sin(sqrt(3) x/2)

In problem 3, it should read which profile is stable by Fjortofts if beta=0?

Also, the last profile SHOULD read:

U = 1/6 y^3 + 5/6 y

To evaluate Fjortoft's, set U_s equal to the value of U where d^2U/dy2 = 0

Published Oct. 22, 2008 7:13 PM

The argument in the exponential should have a minus sign in problem 1 on the 5th problem set.

Published Oct. 22, 2008 7:12 PM

If you have trouble downloading the notes under Firefox, try the Opera browser.

Published Oct. 21, 2008 5:57 PM

There's a problem downloading the class notes. I'm working on it...

Published Sep. 25, 2008 4:28 PM

Problem set 3: Assume that f=f_0 in problem 2 (so that df/dy=0).

Published Sep. 10, 2008 12:30 PM

There were two mistakes in problem 1 on problem set 2. The second order derivative should be with respect to t, not x, and below that it should be cos^3(t) rather than cos^3(x).

For psi0 and psi1, find only the particular solutions. Since we don't have boundary conditions, we ignore the homogeneous solutions.

Also: the sign on the RHS of equation 1 in problem 2 should be positive not negative.