SC12 Home > SC12 Schedule > SC12 Presentation - Low Mach Number Models in Computational Astrophysics

SCHEDULE: NOV 10-16, 2012

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Low Mach Number Models in Computational Astrophysics

SESSION: Large-Scale Simulations

EVENT TYPE: Keynote and Invited Talks

TIME: 3:30PM - 4:15PM

SESSION CHAIR: Robert F. Lucas

Presenter(s):Ann Almgren


A number of astrophysical phenomena are characterized by low Mach number flows. Examples include the convective phase of a white dwarf prior to ignition as a Type Ia supernova, X-ray bursts, and convection in massive stars. Low Mach number models analytically remove acoustic wave propagation while retaining compressibility effects resulting from nuclear reactions and ambient stratification. This enables time steps controlled by advective time scales, resulting in significant reduction in computational costs. We will discuss the derivation and implementation of low Mach number models for astrophysical applications, particularly in the context of structured grid AMR, and will present computational results from three-dimensional adaptive mesh simulations.

Chair/Presenter Details:

Robert F. Lucas (Chair) - Information Sciences Institute

Ann Almgren - Lawrence Berkeley National Laboratory

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