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Projects

Numerics

Order of accuracy and error in numerical methods

• Error definitions for numerical solutions
• Truncation error - local and global

One dimension

Exact Riemann Solver

• 1-D time independent Euler Equations

Godunov Schemes

• Gudonov Method for inviscid Burgers Equation

• Gudonov Method for Euler Equations, using Exact Riemann Solver

Approximate Riemann Solvers to be used with Godunov Schemes

• Approximating the star region of the Riemann problem - PVRS, TSRS and TRRS, Hybrid Schemes

• Approximating the numerical flux for the Riemann problem - HLL and HLLC solvers

• Approximating numerical flux with the Roe Solver

Higher order accuracy Godunov schemes

• Muscl-Hancock for 1D Euler equations

Operator splitting

• Operator splitting to solve Euler equations with gravity

• Testing operator splitting method with the Jeans instability

Two dimension

• Split scheme for the 2D Euler equations, using the Godunov method + exact Riemann solver

Self Gravity

• 1D Poisson Solver

• The Jeans Instability- Theory

• 1D Jeans Instability in AstroBEAR- Test of self-gravity

• Conditions on periodic boundary conditions

Bonnor Ebert Paper

• Analysis for Paper
• Evaluating Boundary Effects
• Paper Figures
• Paper text and outline
• ​PDF ApJ Preprint

Bonnor Ebert Studies

• Surface pressure approximations
• Bonnor-Ebert Studies - Theory and Prelim Tests
• Effects of different background media on stability of BE sphere
• Sink formation in quadrant BE simulations
• m(t)
• Gravitational potential of BE sphere and ambient
• ​Hydrodynamics of Collapse Paper

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Talks

• ​"Supernova in a box: Computational science as a means to study the Cosmos", Monroe Community College, 4/22/2013

• ​"Singular Isothermal Sphere, A popular model for how a single star forms", Journal Club, U of R, 3/28/2013

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Literature Library

• Collection of literature with summaries

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Recent Blog Entries

• Meeting update  -- Posted on 6 years ago : author Erica Kaminski
• Localized Bondi dev update  -- Posted on 6 years ago : author Erica Kaminski
• meeting update  -- Posted on 6 years ago : author Erica Kaminski
• meeting notes  -- Posted on 6 years ago : author Erica Kaminski
• Bondi update - April 30  -- Posted on 6 years ago : author Erica Kaminski

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Astrobear Documentation

• BE module tutorial

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Useful Links

• ​Home page on pas server
• ​Previous weekly meetings page
• New Users Page