Classical dynamics recent progress

[adastra]

Hi all

I am wondering about recent developments of classical dynamics. It seems most physicists are now devoted to quantum world. Is there any effort to broaden the scopes of classical world?

Thanks

 

[Andy Resnick]

I'm going to use a lot of buzzwords, but anyhow...

There's still a lot of theoretical and experimental work on condensed matter systems, especially "soft matter" and the glassy state.

Also biophysics, fluid dynamics, classical field theories, granular materials...

It's a mistake to think that classical physics is complete. There is no theory of viscosity or of fracture, for example.

 

[adastra]

Thanks, so how can i find the recent works in particle dynamics or rigid body dynamics? Searching doesn't help.

Thanks again

 

[Andy Resnick]

I don't know where you are searching, but I would try either the Journals of the American Physics Society website (http://publish.aps.org/), PubMed (http://www.ncbi.nlm.nih.gov/sites/entrez?db=PubMed), or search under "rational mechanics". I found several thousand papers easily. There's also a lot of work on molecular dynamics simulations (which I think is of marginal validity, but that's my opinion).

 

[i_island0]

can anyone give me the journal on
"pressure and displacement of sound waves by C. T. Tindle, American Journal of Physics, September 1984 or 1986 pg 749

 

[adastra]

Thanks, I normally use yahoo or google

 

[Claude Bile]

You can add chaos and chaotic systems to the list.

Also, try searching in Google Scholar rather than the ordinary Google.

Claude.

 

[adastra]

Thanks, but yet i didn't find anything on 'rigid body motion'

 

[ejungkurth]

adastra,

Per aspera, I suppose. Do you have an account at your local university library? They generally can be procured for the equivalent of 50 USD per year. More than worth it, in my opinion.

 

[Cyrus]

I would say engineering. Its almost nothing but classical dynamics, i.e. Aerospace, Mechanical, and Civil.

 

[adastra]

@ejungkurth :

Well yah i have library membership, but hardly there's any review of F=ma or t=2(Pi)((l/g)^0.5), to tell absolute truth, there's none on that. and unfortunately that's what i am searching, : "REVIEW OF THE LAWS LAID DOWN BY CLASSICAL MECHANICS".

Perhaps i will include more details. Classical mechanics has already been reviewed in extreme cases with quantum and relativistic ideas. But i wonder if there had been in any necessity, to explain some weired experiment of phenomenon perhaps, to modify or review classical mechanics in familiar cases. Maybe some experiment that shows F=m^2.a in a very everyday environment, and everyday scale, and there's been a necessity to review classical mechanics. I am looking for such things.

@Cyrus:

Thanks for the info. I would like to know if there's any review of laws of classical dynamics is done.

 

[Andy Resnick]

<snip>

Perhaps i will include more details. Classical mechanics has already been reviewed in extreme cases with quantum and relativistic ideas. But i wonder if there had been in any necessity, to explain some weired experiment of phenomenon perhaps, to modify or review classical mechanics in familiar cases. Maybe some experiment that shows F=m^2.a in a very everyday environment, and everyday scale, and there's been a necessity to review classical mechanics. I am looking for such things.

@<snip>

This is a pet peeve of mine: classical dynamics is not subsumed into, or subordinate to, or even an approximation of, quantum mechanics by any stretch. For example, here are some classical phenomena on which a solution via quantum mechanics is totally innappropriate:

Turbulence
Elasticity/viscoelasticity/viscoplasticity...
Granular flow
Shock waves

None of the above are solved problems. Therefore, there is much research on solving them due to the fundamental importance these topics have to modern life: Granular flow affects billions of dollars in food and cosmetics, shock waves in air transport, material properties of real nonlinear materials like composites and biomaterials, etc. etc.

Now, a small subset of mechanics, namely the mechanics of weakly-interacting point particles, has been superceded by quantum mechanics. But that is a tiny portion of life, the universe, and everything.

 

[Cyrus]

@Cyrus:

Thanks for the info. I would like to know if there's any review of laws of classical dynamics is done.

I don't know what you mean by this.

 

[Roche]

This is a pet peeve of mine: classical dynamics is not subsumed into, or subordinate to, or even an approximation of, quantum mechanics by any stretch. For example, here are some classical phenomena on which a solution via quantum mechanics is totally innappropriate:

Turbulence
Elasticity/viscoelasticity/viscoplasticity...
Granular flow
Shock waves

None of the above are solved problems. Therefore, there is much research on solving them due to the fundamental importance these topics have to modern life: Granular flow affects billions of dollars in food and cosmetics, shock waves in air transport, material properties of real nonlinear materials like composites and biomaterials, etc. etc.

Now, a small subset of mechanics, namely the mechanics of weakly-interacting point particles, has been superceded by quantum mechanics. But that is a tiny portion of life, the universe, and everything.

“Why spend so long
On a theory that’s wrong?”
Well, it works for your everyday query! (David Morin)

I have a similar position. There are several (almost) disjoint Physics. By disjoint I mean that each one gives good answers in their own application field, but is only loosely conected to the other Physics

Coming back to classical dynamics recent progress I would look at what people like Jerrold E. Marsden, Tudor Ratiu, David Morin,... are doing

 

[adastra]

Coming back to classical dynamics recent progress I would look at what people like Jerrold E. Marsden, Tudor Ratiu, David Morin,... are doing

Thanks, please give me how to reach them, and the full list please

 

[Roche]

Well, I do not know exactly what you are looking for but this should give you a good start:
http://projecteuclid.org/DPubS?service=UI&version=1.0&verb=Display&handle=euclid.bams/1183546250