Wave Dispersion in a Two-Phase Gas Mixture : Comments on Random Motions and Void Modes

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

4

Hydrodynamics, Ism: Clouds, Ism: General, Ism: Structure

Scientific paper

The properties of linear waves in a mixture comprising diffuse and dense phases are discussed using two approaches: (i) In one approach, the repulsive pressure produced in the diffuse phase by ballistically moving dense clouds generates motion of the components when gradients of the volume-filling factor arise; ({ii}) in the other approach, where this effect is omitted, a mixture is dynamically insensitive to perturbations containing only variations in the volume-filling factor of dense clouds. We show that the wave dynamics in these two approaches is quite different: in the framework of the first approach, the dispersion relation contains two different branches --- the acoustic and the void (pattern formation) modes, while in the second approach the void mode disappears. We argue that in most situations for astrophysical gas mixtures, the first approach is more applicable: since effects of repulsive pressure from randomly moving clouds do exist, the void mode must be important in determining the dynamics of small perturbations and the formation of structures.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Wave Dispersion in a Two-Phase Gas Mixture : Comments on Random Motions and Void Modes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Wave Dispersion in a Two-Phase Gas Mixture : Comments on Random Motions and Void Modes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wave Dispersion in a Two-Phase Gas Mixture : Comments on Random Motions and Void Modes will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-764138

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.