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Add to Calendar 2/28/2018 12:00 pm 2/28/2018 America/Chicago Astrophysics, Gravitation and Cosmology Seminar: "Veracity and Analysis of Astrophysical Simulations" DESCRIPTION:

The goal of numerical simulations in astrophysics is to enhance our understanding of astrophysical phenomena. In this talk, I will describe two impediments to this goal. The first issue is that simulation results may be caused by numerical rather than physical effects. I will discuss a two-dimensional Kelvin-Helmholtz instability problem which illustrates this effect. This highlights the importance of resolution studies for simulations. The second issue is that simulations output ``big data'' and are thus difficult to analyze. I will describe efforts to interpret simulation data related to the problem of convective excitation by waves in stellar interiors. I will develop a hierarchy of models, where simulation data are fed into simplified, reduced simulations testing different theories. This approach can lead to fundamental insight into important astrophysical problems.

\n\nSPEAKER:

Daniel Lecoanet, Princeton University

464 Loomis

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Astrophysics, Gravitation and Cosmology Seminar: "Veracity and Analysis of Astrophysical Simulations"

Speaker Daniel Lecoanet, Princeton University
Date: 2/28/2018
Time: 12 p.m.
Location:

464 Loomis

Event Contact: Betsy Greifenkamp
greifenk@illinois.edu
Sponsor:

Department of Physics

Event Type: Seminar/Symposium
 

The goal of numerical simulations in astrophysics is to enhance our understanding of astrophysical phenomena. In this talk, I will describe two impediments to this goal. The first issue is that simulation results may be caused by numerical rather than physical effects. I will discuss a two-dimensional Kelvin-Helmholtz instability problem which illustrates this effect. This highlights the importance of resolution studies for simulations. The second issue is that simulations output ``big data'' and are thus difficult to analyze. I will describe efforts to interpret simulation data related to the problem of convective excitation by waves in stellar interiors. I will develop a hierarchy of models, where simulation data are fed into simplified, reduced simulations testing different theories. This approach can lead to fundamental insight into important astrophysical problems.

To request disability-related accommodations for this event, please contact the person listed above, or the unit hosting the event.

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