0
$\begingroup$

Can someone please explain the meaning of flux 2-integral in this sentence:

Mass is evaluated as a flux 2-integral at the asymptotic infinity.

For asymptotic infinity, I believe it is as explained in this Math.SE post.

$\endgroup$
  • $\begingroup$ We will need a lot more context to answer this question, as far as I can tell a 2-integral may mean a double integral. This would fit with a flux integral being the double integral over the scalar product of a vector and an area element. But what it has to do with mass depends on the context...it has meaning in fluid dynamics where they might mean mass transfer rate through a cross sectional area. $\endgroup$ – Triatticus Nov 17 '18 at 17:19
  • $\begingroup$ Quote from which reference? $\endgroup$ – Qmechanic Nov 17 '18 at 18:34
1
$\begingroup$

A 2-integral means an integral over a two-dimensional hypersurface.

Flux means the “flow” of some quantity across this surface. Mathematically, you are usually integrating the components of some tensor perpendicular to the hypersurface.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.