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- Newsgroups: sci.math.num-analysis
- Path: sparky!uunet!ulowell!woods.ulowell.edu!chakravaa
- From: chakravaa@woods.ulowell.edu
- Subject: Having trouble with FEM functional
- Message-ID: <1992Dec26.221924.1@woods.ulowell.edu>
- Lines: 20
- Sender: usenet@ulowell.ulowell.edu (News manager - ulowell)
- Organization: University of Lowell
- Date: Sun, 27 Dec 1992 03:19:24 GMT
-
- Good day,
- I'm interested in solving a Diffusion equation problem using FEM. However,
- I'm having difficulty putting the equation into a functional form that can be
- manipulated. The equation is a 1-D equation with the following boundary
- conditions:
- u(x,0) = f(x) = sin x
- and u(0,t) = u(L,t) = 0 as bc's.
- the actual equation as such comes to a solution of
- u(x,t) = sin (x) (e**(-k**2 t )
- when solved analytically.
- When attempting to use the Euler-Lagrange eqn. to find the functional form,
- I was having extreme difficulties in determining my course of action,
- particularly in solving for adjoint operators in the equation.
- Any help would be appreciated.
-
- Ut = k**2 Uxx is the Diffusion equation.
-
- Thanx.
- A.C.
-
-