The Dangers of Constraining the Kernel Radius in SPH Galaxy Simulations

Details The Dangers of Constraining the Kernel Radius in SPH Galaxy Simulations The Dangers of Constraining the Kernel Radius in SPH Galaxy Simulations

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aspc..275..452w&link_type=abstract

Disks of Galaxies: Kinematics, Dynamics and Peturbations, ASP Conference Proceedings, Vol. 275. Edited by E. Athanassoula, A. Bo

Astronomy and Astrophysics

Astronomy

Scientific paper

The Smoothed Particle Hydrodynamics (SPH) method involves calculating hydrodynamic quantities in a fluid by evaluating weighted summations over particles in the vicinity of the point of interest. The characteristic resolution length over which these summations are evaluated is the so--called kernel radius h. In many SPH simulations of galaxy formation a lower limit is imposed on h equal to the gravitational softening length ɛ, while ɛ is held constant. Such a constraint limits the maximum density resolvable in a simulation, and thus indirectly provides a lower limit on the timestep. However, it has been found that such a constraint can compromise the spatial resolution to which hydrodynamical quantities are evaluated to the extent that the evolution of the gross features of resultant numerical galaxies are affected, and the ability to capture shocks vastly reduced.

Affiliated with

Also associated with

No associations

Rating

The Dangers of Constraining the Kernel Radius in SPH Galaxy 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 The Dangers of Constraining the Kernel Radius in SPH Galaxy Simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Dangers of Constraining the Kernel Radius in SPH Galaxy Simulations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1441721