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Computational Astrophysics: The Digital Demo Room One-Dimensional Hydrodynamics Simulator Conley “Lee” Ditsworth under the care and feeding of Dr. Charles F. Gammie and close supervision of graduate student Eric Engelhard. http://rainman.physics.uiuc.edu/ddr/oned/index.html. Project Goal.

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Computational Astrophysics:

The Digital Demo Room

One-Dimensional Hydrodynamics

Simulator

Conley “Lee” Ditsworth

under the care and feeding of

Dr. Charles F. Gammie

and close supervision of graduate student

Eric Engelhard

http://rainman.physics.uiuc.edu/ddr/oned/index.html


Project goal
Project Goal

Convert an existing hydrodynamics computer code, written in C by Dr. Gammie, from a stand-alone program to an interactive simulator accessible through internet web browsers

Secondary Goal: Enable future professors teaching graduate-level fluid mechanics a means of assigning additional homework!

…sorry


The code
The Code

  • Original version uses initial conditions file to set up medium and type of wave

  • A perturbation sets the wave into motion

  • Program performs calculations and outputs data to files based on time steps

  • Code must be recompiled for every change in equilibrium conditions or type of wave


Steps to successful completion
Steps to Successful Completion

  • Re-write C code to accept input data file

  • Create web pages to guide user and accept inputs (html, cgi script written in Perl)

  • Write program(s) to convert output data first to images and then movie files

  • Make movie files and raw data available through the website


The current situation
The Current Situation

  • Code re-written to take equilibrium conditions from an input data file

  • Interactive website designed to gather inputs and create an input data file

  • Perl script created to run programs

  • Hydrodynamics code executes and creates output data files


Current status continued
Current Status Continued…

  • SM (Super Mongo) plotting program converts raw data to ppm image files

  • mpeg encoder program (mpeg2encode) translates images into a movie file

  • Raw data and movie file archived and made available to user through website

Sample Movie


What s left to do
What’s Left To Do?

  • Plotted ppm image files need work

  • How to handle multiple users

  • Expand to have separate simulators for beginner, intermediate and expert level

  • Create a link to all archived files

  • Beautify the website

  • Write paper!


That s all folks
That’s All Folks!

The One-Dimensional Hydrodynamic Simulator Can Be Found At The Digital Demo Room:

http://rainman.physics.uiuc.edu/ddr/oned/index.html

Conley “Lee” Ditsworth

Rm 235 LLP

[email protected] or [email protected]

sorry, no office phone available…


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