1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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!

8. 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 lee@shout.netlee@shout.net or ditswort@uiuc.eduditswort@uiuc.edu sorry, no office phone available…