Does the Poisson Equation Have a Unique Solution with Mixed Boundary Conditions?

Click For Summary

Discussion Overview

The discussion centers on the uniqueness of solutions to the Poisson equation under mixed boundary conditions, specifically when combining Dirichlet and Neumann boundary conditions. Participants explore the implications of having different types of boundary conditions and question how a unique solution can exist in such scenarios.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants assert that the Poisson equation has a unique solution for each specified set of boundary conditions, including mixed conditions.
  • Others question the validity of this assertion, noting that different boundary conditions typically yield different solutions.
  • A participant highlights that while unique solutions exist for Dirichlet and Neumann conditions separately, these solutions may not be consistent when combined.
  • There is a request for specific examples to clarify the relationship between mixed boundary conditions and the uniqueness of solutions.

Areas of Agreement / Disagreement

Participants express disagreement regarding the uniqueness of solutions under mixed boundary conditions, with no consensus reached on the matter.

Contextual Notes

The discussion lacks specific examples or mathematical proofs to support the claims made, and the assumptions underlying the boundary conditions are not fully explored.

ajeet mishra
Messages
9
Reaction score
1
My professor told that poission equation has a unique solution even for mixed boundary conditions( i.e. Dirichlet bc for some part and Neumann for the remaining part). But how is this possible? As different boundary conditions for the same problem will give different solutions.
 
Physics news on Phys.org
ajeet mishra said:
My professor told that poission equation has a unique solution even for mixed boundary conditions( i.e. Dirichlet bc for some part and Neumann for the remaining part). But how is this possible? As different boundary conditions for the same problem will give different solutions.
It has a unique solution for each specified set of boundary conditions.
 
  • Like
Likes   Reactions: ajeet mishra
Chestermiller said:
It has a unique solution for each specified set of boundary conditions.
But how? As there are unique solutions for drichlet and neumann conditions separately and these, in general, may not be consistent.
 
ajeet mishra said:
But how? As there are unique solutions for drichlet and neumann conditions separately and these, in general, may not be consistent.
Can you provide a specific example (or examples) to illustrate what you are saying?
 

Similar threads

  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 27 ·
Replies
27
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
8
Views
3K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 8 ·
Replies
8
Views
5K
  • · Replies 1 ·
Replies
1
Views
2K