Proving the Divergence Theorem for Bounded Domains and Differentiable Fields

Click For Summary
SUMMARY

The discussion centers on proving the Divergence Theorem for bounded domains, specifically for the case where the vector field \(\nabla \cdot \vec{V} = 0\) and \(\vec{W} = \nabla \phi\) with \(\phi = 0\) on the boundary surface \(S\). The conclusion drawn is that the integral \(\int\int\int_{D} \vec{V} \cdot \vec{W} dV = 0\) holds true under these conditions. The problem is situated within the context of Laplace's, Poisson's, and Green's formulas, indicating a strong reliance on vector calculus identities for its resolution.

PREREQUISITES
  • Understanding of vector calculus, specifically the Divergence Theorem.
  • Familiarity with Laplace's and Poisson's equations.
  • Knowledge of Green's identities and their applications.
  • Proficiency in differentiable fields and vector fields.
NEXT STEPS
  • Study the Divergence Theorem and its applications in bounded domains.
  • Explore Green's identities and their derivations in vector calculus.
  • Learn about vector potentials and their relationship to curl and divergence.
  • Investigate alternative proofs of the Divergence Theorem without relying on vector identities.
USEFUL FOR

Students and professionals in mathematics, particularly those focusing on vector calculus, differential equations, and mathematical physics, will benefit from this discussion.

EngageEngage
Messages
203
Reaction score
0

Homework Statement


Let the domain D be bounded by the surface S as in the divergence theorem, and assume that all fields satisfy the appropriate differentiability conditions.
Suppose that:
[tex]\nabla\cdot\vec{V}=0[/tex]
[tex]\vec{W}=\nabla\phi with \phi = 0 on S[/tex]
prove:
[tex]\int\int\int_{D}\vec{V}\cdot\vec{W}dV=0[/tex]

This problem is in the Laplace's, Poisson's and Greens Formulas section. Truthfully I'm not sure where to even get started here. If anyone could give me a push in the right direction I would appreciate it greatly.
 
Physics news on Phys.org
nevermind; got it!
 
I used a vector identity, but can someone please help me do this one without an identity. This is in a greens identities section, but none of the greens identities look like they would work. Is it right of me to say that
[tex]\vec{V} = curl \vec{G}[/tex]

where g i ssome vector potential? or would this not help me at all?
 

Similar threads

  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
Replies
6
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 6 ·
Replies
6
Views
3K