Talk:Incompressible flow

Merge tag
I'd suggest splitting it up into an article in the "Exact solutions in general relativity" category and the incompressible fluid article.---CH (talk) 00:58, 27 July 2005 (UTC)

Perfect Fluids and Incompressible fluids are different. A perfect fluid is an physical concept similar to an ideal gas. As the article says, there is no shear stresses or viscosity. These are frequently used in General Relativity. An incompressible fluid is one where the density does not vary, and div(u)=0. Incompressible fluids can have shear stresses and viscosity, and are therefore not "perfect". Incompressible fluids are often used in Fluid Mechanics and in Chemical Engineering. Due to the different definitions and usages of the terms, I would argue to keep the pages separate. Bluap 12:41, 28 July 2005 (UTC)


 * I'm gonna be bold and remove eh merge tag. the articles have little in common. linas 05:56, 1 September 2005 (UTC)

Article title: Incompressible fluid or Incompressible flow
Incompressible flow redirects here. I'd like to suggest that this article be moved there, and this made a redirect. I had a fluid mechanics prof who liked to harp heavily on the fact that there are no incompressible fluids, and we don't even model fluids as incompressible, but we model flows or problems as incompressible. He had a point. We don't use properties of the fluid to decide if something is incompressible, we use the Mach number, which is a property of the problem as a whole. I'd be willing to rewrite the article to reflect the new name. moink 21:34, 22 September 2005 (UTC)

define all variables
could someone please define was u is? is that referring to the displacement or velocity? —The preceding unsigned comment was added by 72.130.179.41 (talk) 21:38, 9 December 2006 (UTC).