Use the method of separation of variables todetermine a non-trivial solution of the heat equation with boundary variables: k J²u du əx² It' u(0, t) = 0, 0 < x 0, u(L, t) = 0, t> 0 u(x,0) = f(x), 0 0 is X(x) = C₁ cos(√√x) + C₂ sin(√x), and T' + kXT = 0 is T(t) = C3e-kt, where C₁, C2, C3 will be determiend using = associated initial conditions.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Use the method of separation of variables todetermine a non-trivial solution of the heat equation
with boundary variables:
k
J²u
du
əx² It'
u(0, t) = 0,
0 < x <L, L>0,
u(L, t) = 0, t> 0
u(x,0) = f(x), 0<x<L.
=
(1)
(2)
u = 0
0
u(x,x)
u = 0
I
I
L
X
Hint: A non-trivial general solution of X" + XX = 0 for λ> 0 is X(x) = C₁ cos(√√x) +
C₂ sin(√x), and T' + kXT = 0 is T(t) =
C3e-kt, where C₁, C2, C3 will be determiend using
=
associated initial conditions.
Transcribed Image Text:Use the method of separation of variables todetermine a non-trivial solution of the heat equation with boundary variables: k J²u du əx² It' u(0, t) = 0, 0 < x <L, L>0, u(L, t) = 0, t> 0 u(x,0) = f(x), 0<x<L. = (1) (2) u = 0 0 u(x,x) u = 0 I I L X Hint: A non-trivial general solution of X" + XX = 0 for λ> 0 is X(x) = C₁ cos(√√x) + C₂ sin(√x), and T' + kXT = 0 is T(t) = C3e-kt, where C₁, C2, C3 will be determiend using = associated initial conditions.
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