Adaptive Smoothed Particle Hydrodynamics, with Application to Cosmology: Methodology

1996 ◽  
Vol 103 ◽  
pp. 269 ◽  
Author(s):  
Paul R. Shapiro ◽  
Hugo Martel ◽  
Jens V. Villumsen ◽  
J. Michael Owen
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Adaptive Smoothed Particle Hydrodynamics

scholarly journals Validating Ice Impacts Using Adaptive Smoothed Particle Hydrodynamics for Planetary Defense

2019 ◽  
Author(s):  
Dawn Graninger ◽  
Megan Bruck Syal ◽  
J. Michael Owen ◽  
Paul Miller
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Weibull Modulus ◽  
Damage Model ◽  
Water Ice ◽  
Hazardous Object ◽  
Planetary Defense ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Ice Impacts ◽  
Adaptive Smoothed Particle Hydrodynamics

Abstract Understanding how a potentially hazardous object (PHO) responds to a kinetic impactor is of great interest to the planetary defense community. Target response depends upon the detailed material properties of the PHO, which may not be well constrained ahead of time. Hence, it is useful to explore a variety of target compositions for kinetic impact deflection. Previous validation efforts have focused primarily on understanding the behavior of common rocky materials, though PHOs are not exclusively composed of such material. Water ice is one material for which there has been only limited code validation against cratering experiments. It is known that comets consist of primarily icy material and some asteroids likely contain some amount of ice. Therefore, it is useful to understand the model sensitivities for ice in deflection simulations. Here we present Adaptive Smoothed Particle Hydrodynamics simulations of impacts into water ice by an aluminum projectile. We explore the sensitivities to the damage model within our code and find that the best-fit simulations of ice occur with a Weibull modulus of 12, though results can be obtained with values of the Weibull modulus near the published value of 9.59. This work demonstrates the efficacy of using an adaptive smoothed particle hydrodynamics code to simulate impacts into ice.

scholarly journals Adaptive Smoothed Particle Hydrodynamics: Methodology. II.

1998 ◽  
Vol 116 (2) ◽  
pp. 155-209 ◽  
Author(s):  
J. Michael Owen ◽  
Jens V. Villumsen ◽  
Paul R. Shapiro ◽  
Hugo Martel
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Adaptive Smoothed Particle Hydrodynamics

scholarly journals Adaptive Smoothed Particle Hydrodynamics for Study of Friction of Silica at Micronscale

2020 ◽  
Vol 15 (4) ◽  
pp. 259-264
Author(s):  
Le Van Sang ◽  
Akihiko Yano ◽  
Ai Osaka ◽  
Natsuko Sugimura ◽  
Hitoshi Washizu
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Adaptive Smoothed Particle Hydrodynamics

scholarly journals Cosmological Simulations with Adaptive Smoothed Particle Hydrodynamics

2003 ◽  
Vol 208 ◽  
pp. 315-322 ◽  
Author(s):  
Hugo Martel ◽  
Paul R. Shapiro
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Radiative Cooling ◽  
Cosmological Simulations ◽  
Tracking Ability ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Adaptive Smoothed Particle Hydrodynamics ◽  
Anisotropic Smoothing

We summarize the ideas that led to the Adaptive Smoothed Particle Hydrodynamics (ASPH) algorithm, with anisotropic smoothing and shock-tracking. We then identify a serious new problem for SPH simulations with shocks and radiative cooling — false cooling — and discuss a possible solution based on the shock-tracking ability of ASPH.

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