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

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Discussion Overview

The discussion explores the possibility of comparing Einstein's 4D space-time to a fluid, examining theoretical implications and analogies. Participants consider both conceptual and technical aspects of this comparison.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the validity of comparing 4D space-time to a fluid, suggesting that while there are cases where space-time behaves like a fluid, it fundamentally remains a geometric construct.
  • Another participant argues that since gravity waves cause transverse shear stress deformation in the manifold, space-time may be more analogous to a liquid fluid in this context.
  • A different viewpoint presents a visualization of space-time as a 3D grid of flexible metal bars that deform around mass-energy, emphasizing its geometric nature rather than fluid characteristics.

Areas of Agreement / Disagreement

Participants express differing opinions on the comparison of space-time to fluids, indicating that multiple competing views remain without a consensus on the validity of the analogy.

Contextual Notes

The discussion includes assumptions about the nature of fluids and the properties of space-time, which may not be fully articulated or agreed upon by all participants.

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

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