Analytical Solution to Poisson's Equation

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SUMMARY

The discussion focuses on solving Poisson's equation, specifically del²φ = 1 in two dimensions with zero boundary conditions. The user proposes a substitution u = φ(x,y) - (1/2)x², which simplifies the equation to del²u = 0. The solution involves applying Fourier series, although the user expresses limited experience with this technique. The conversation emphasizes the importance of understanding Fourier series for solving boundary value problems in partial differential equations.

PREREQUISITES
  • Understanding of partial differential equations (PDEs)
  • Familiarity with Poisson's equation
  • Basic knowledge of Fourier series
  • Concept of boundary value problems
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  • Study the derivation and applications of Poisson's equation
  • Learn about Fourier series and their role in solving PDEs
  • Explore boundary value problem techniques in mathematical physics
  • Review examples of analytical solutions to similar equations
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Mathematicians, physicists, and engineering students who are tackling boundary value problems and seeking to deepen their understanding of Poisson's equation and Fourier series applications.

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I have the equation del^2 phi =1 for 2-d (x and y) with the boundary condition being 0 along all 4 edges. I've looked in all my math books and can't find how to solve this. If anyone could get me started I would appreciate it.
 
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Let u= phi(x,y)- (1/2)x2. Then del2u= del2phi- 1= 0. The boundary conditions get a little complicated but it can be done as a Fourier series.
 
My experience with Fourier series is extremely limited and your hint doesn't mean anything to me.
 

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