2
$\begingroup$

I have an equation with the nondimensional number $\Delta P L / \sigma$.

Here $\Delta P$ is a characteristic pressure drop, $L$ is a characterictic length, and $\sigma$ is a characteristic surface tension. Is there a name for this number? I couldn't find it listed here: https://en.wikipedia.org/wiki/Dimensionless_numbers_in_fluid_mechanics

$\endgroup$
5
$\begingroup$

According to the book "Dimensionless Physical Quantities in Science and Engineering" it is known as the Laplace Number. In the book it is written both in the form you quote, and in the form listed in the Wiki-link you provided, where Laplace Number is also listed.

$\endgroup$
  • $\begingroup$ Excellent! Thanks for the reference! $\endgroup$ – Lukas Bystricky Aug 30 at 7:50
3
$\begingroup$

As a follow on to Sparticle's answer, this is also known as a Suratman number (Su). From Wikipedia.

$\endgroup$

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.