General Relativity and continuum mechanics

In summary, there is a connection between general relativity and continuum mechanics, but it is different in spirit and strength. Specific aspects of GR can be connected to continuum mechanics, as demonstrated by classic results by Jacobson. One paper explores the relationship between GR and information theory while the other focuses on non-equilibrium physics.
  • #1
niahl
1
0
Hello! I started learning relativity recently and I'm an engineering student. I can't stop drawing similarities between the nature of gravity and behaviour of continuous media in the field of continuum mechanics. Is there some direct connection and if so, has something like this been explored already?
 
Physics news on Phys.org
  • #2
Yes but there are a variety of heuristic connections between continuum mechanics and GR and they are different in spirit and strength. If you want specifics then you yourself will have to be more specific on what aspects of GR you would like to see connected to continuum mechanics.

At the most fundamental level one has the following classic results by Jacobson:
http://arxiv.org/pdf/1505.04753.pdf
http://arxiv.org/pdf/gr-qc/9504004v2.pdf

Granted, the first paper is more of a relationship between GR and information theory than it is continuum mechanics but it does involve very similar non-equilibrium physics.
 

1. What is the difference between General Relativity and continuum mechanics?

The main difference between General Relativity and continuum mechanics is that General Relativity is a theory of gravitation that describes the effects of gravity on a large scale, while continuum mechanics is a branch of physics that studies the behavior of continuous materials under various physical conditions.

2. How does General Relativity explain the bending of light?

According to General Relativity, the presence of massive objects causes a distortion in the fabric of space-time. This distortion, known as gravitational lensing, can cause the path of light to bend as it travels through the curved space-time around a massive object.

3. What is the significance of the cosmological constant in General Relativity?

The cosmological constant was originally introduced by Einstein to balance the attractive force of gravity and prevent the universe from collapsing. However, it is now believed to have a different role in the expansion of the universe, as it has been observed that the expansion is accelerating, rather than slowing down.

4. Can General Relativity be applied to the quantum world?

While General Relativity is highly successful in explaining the behavior of macroscopic objects, it breaks down when applied to the quantum world. This is because the theory of General Relativity does not take into account the effects of quantum mechanics, which govern the behavior of particles on a subatomic scale.

5. What are some real-world applications of continuum mechanics?

Continuum mechanics has many practical applications in engineering, such as in the design of structures and materials. It is used to study the behavior of fluids in pipes and channels, the deformation of solid materials under stress, and the flow of heat and electricity through different materials.

Similar threads

  • Special and General Relativity
Replies
12
Views
379
  • Special and General Relativity
Replies
17
Views
593
  • Special and General Relativity
2
Replies
49
Views
3K
  • Special and General Relativity
Replies
32
Views
4K
  • Special and General Relativity
Replies
20
Views
2K
  • Special and General Relativity
Replies
2
Views
868
  • Special and General Relativity
Replies
17
Views
1K
  • Special and General Relativity
Replies
5
Views
1K
  • Special and General Relativity
Replies
6
Views
2K
  • Special and General Relativity
Replies
1
Views
2K
Back
Top