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Homework Help: Analytic Solution Wave Equation

  1. Nov 18, 2015 #1
    1. The problem statement, all variables and given/known data

    Plot the solution at times t = 0, t = 0.25 and t = 0.5. Based on your knowledge of the general solution of the wave equation, the behaviour you see here, and the initial data profile, what is the analytic solution u(x, t) to this problem? (In deriving the analytic solution, you do not have to take into account the periodic boundary conditions; assume an infinite computational domain.)

    u(x,0) = exp(-((x)^2)/(2.*0.1^2)
    du/dt = 0
    du/dx = -100x*u(x,0)

    Ok, so I've been solving this problem numerically using python and this is the plot I get (attached)

    So now I need to work out the analytic solution from this and I really don't know what to do.

    I was working with this earlier but Im not sure if its correct

    u(x,t) = F(x)G(t)
    d2u/dt2 = F(x) d2G/dt2(t)
    d2u/dx2 = d2F/dF2 G(t)

    Something along these lines

    I have to get this question done and the deadline is 5pm today :O :O :O

    Please help!!!!!


    Attached Files:

    • Fig5.png
      File size:
      12.7 KB
  2. jcsd
  3. Nov 23, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
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