1.9k citations · 24.6k across the 271 of their papers we have counts for
12 papers · 1 filter
A Moving Frame Algorithm for High Mach Number Hydrodynamics
Hy Trac, Ue-Li Pen
We present a new approach to Eulerian computational fluid dynamics that is designed to work at high Mach numbers encountered in astrophysical hydrodynamic simulations. The Eulerian…
The naked singularity in the global structure of critical collapse spacetimes
Andrei V. Frolov, Ue-Li Pen
We examine the global structure of scalar field critical collapse spacetimes using a characteristic double-null code. It can integrate past the horizon without any coordinate probl…
High Performance Commodity Networking in a 512-CPU Teraflop Beowulf Cluster for Computational Astrophysics
John Dubinski, Robin Humble, Ue-Li Pen +2
We describe a new 512-CPU Beowulf cluster with Teraflop performance dedicated to problems in computational astrophysics. The cluster incorporates a cubic network topology based on…
A Free, Fast, Simple and Efficient TVD MHD Code
Ue-Li Pen, Phil Arras, ShingKwong Wong
We describe a numerical method to solve the magnetohydrodynamic (MHD) equations. The fluid variables are updated along each direction using the flux conservative, 2nd order, total…
Fast n-point correlation functions and three-point lensing application
Lucy Liuxuan Zhang, Ue-Li Pen
We present a new algorithm to rapidly compute the two-point (2PCF), three-point (3PCF) and n-point (n-PCF) correlation functions in roughly O(N log N) time for N particles, instead…
Gravitational Lensing of Epoch-of-reionization Gas
Ue-Li Pen
I present a weak lensing sensitivity estimate for upcoming high redshift (epoch of reionization and beyond) 21cm surveys. Instruments such as PAST, LOFAR and SKA should be able to…