Comparing Einstein's 4D Space-Time to a Fluid: Is it Possible?

[delplace]

is it possible to compare Einstein 4D space-time to a fluid ?

 

[cuallito]

maybe

 

[zankaon]

A fluid is either a gas or liquid. Since gravity waves result in a transverse shear stress deformation to manifold, and not a pressure (normal stress); then in this respect, such manifold (spacetime) would seem more like a liquid fluid.

 

[cuallito]

Okay, I'll be helpful: in certain cases it kind of acts like a fluid, but it's not. It's a geometry. If you could imagine a 3D grid of flexible metal bars which 'bows in' around mass-energy that's a good picture of spacetime.