Efficient Solutions for the Poisson-Boltzmann Equation in a Rectangular Domain

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Discussion Overview

The discussion focuses on finding efficient methods for solving the Poisson-Boltzmann equation within a rectangular domain, specifically seeking analytical or semi-analytical approaches under constant boundary conditions.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant seeks methods for solving the Poisson-Boltzmann equation with constants C and A, mentioning constant boundary conditions.
  • Another participant suggests using a Fourier transform, indicating that the exponential term in the equation may lend itself to this approach.
  • A different participant challenges the Fourier transform suggestion, noting that the exponential term involves the function itself rather than just the independent variables x or y.
  • Another proposed method involves expressing the right-hand side as a power series centered at the origin and truncating it to a low order, such as first or second, to solve the resulting partial differential equation.

Areas of Agreement / Disagreement

Participants express differing opinions on the appropriateness of the Fourier transform method, indicating a lack of consensus on the best approach to solve the equation.

Contextual Notes

The discussion does not clarify the specific forms of the constants C and A or the nature of the boundary conditions, which may influence the proposed methods.

Assaf Peled
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Hello,

I'm trying to find either an analytical or a semi-analytical method for solving the following P-B Eq.
upload_2017-8-19_20-15-16.png

with C and A being two constants. The equation is to be solved within a rectangle with constant boundary conditions.

If anyone has a clue, I'll be grateful.

Have a good evening.
 

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Have you tried using a Fourier transform? The exponential in your equation makes that method seem promising.
 
Not sure that you're right because the exponential term contains the function itself rather than the independent variables x or y.
 
In that case, the only other method I know would be to write the right hand side as a power series centered at the origin of the domain and truncate the series to some low order, like first or second, and solve the resulting PDE.
 

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