Hydrodynamic Drag in Cosmological Simulations

Details Hydrodynamic Drag in Cosmological Simulations Hydrodynamic Drag in Cosmological Simulations

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...561...69t&link_type=abstract

The Astrophysical Journal, Volume 561, Issue 1, pp. 69-81.

Astronomy and Astrophysics

Astronomy

8

Galaxies: Clusters: General, Galaxies: Kinematics And Dynamics, Hydrodynamics, Cosmology: Large-Scale Structure Of Universe, Methods: Numerical

Scientific paper

We present a study of hydrodynamic drag forces in smoothed particle hydrodynamic (SPH) simulations. In particular, the deceleration of a resolution-limited cold clump of gas moving through a hot medium is examined. The drag at subsonic velocities exceeds that expected from simple dynamics-based arguments. The excess is shown to be a result of the hydrodynamic method. SPH encourages the accretion of particles from the hot medium on to a shell around the cold clump, effectively increasing the radius of the clump. For sonic and supersonic velocities, the effective area of the clump is shown to be set by the symmetrized smoothing length. The relationship of the effective area to the smoothing length breaks the expected dependency of drag on density since the symmetrized smoothing length increases with decreasing density. The consequences for cosmological simulations are discussed.

Affiliated with

Also associated with

No associations

Rating

Hydrodynamic Drag in Cosmological Simulations 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 Hydrodynamic Drag in Cosmological Simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrodynamic Drag in Cosmological Simulations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1234740