MSE2094
Analytic Methods in Material Science

Assignment #7: Molecular Dynamics Model

Ronald D. Kriz
College of Engineering
Virginia Tech


Part I (100 pts):
Molecular Dynamics Model: Fortran Program and Visualization of Results


DUE: April 29, 1997

Objective: This assignment is designed to introduce you to running a simple dynamic molecular model and transfering your results onto a UNIX workstation. by using ftp.

In this assignment you will learn how to:

Your grade will be based on creating the following files in your own personal directory so that I can reproduce your results by going into your directory and accessing your files. You can work together as a team on this project however I expect everyone to generate your own files. The files I expect to see in your directory are:

INSTRUCTIONS:

A molecular dynamic procedure that is already outlined in some detail in the topics section of the MSE2094 Class Notebook assumes a working knowledge of UNIX, therefore for this class this section is optional where for those students interested in completing this section there is a more extensive procedure listed Assignment 7.5 that will supplement the procedure already listed.

On Tuesday April 22nd I'll introduce you to some basic UNIX skills, like how to logon , change directories and ftp files into directories.

For this assignment you are only required to download correct a few typical compile errors and generate an output file of results. To grade your results I want each student seperately to transfer their three files (molec_dyn.f, md3.in, md.out) onto viz2.sv.vt.edu UNIX workstation.

1. Logon to the MSE2094 account on viz2.sv.vt.edu

Either go into the sciviz lab or logon remotely to viz2.sv.vt.edu
logon: mse2094
password: molec.dyn

List files by using the UNIX command "ls -lag" and you will see three directories named Class95, Class96, Class97. Go into the Class97 directory by using the UNIX command "cd Class97" command which gets you into the Class97 directory. List the contents of this directory by using the UNIX command "ls -lag" and you will see your lastname in lower case listed below in alphabetic order. Go into your directory by using the UNIX command "cd your-lastname" which should be empty. To check your position in the diretory tree structure use the UNIX command pwd (p-rint w-orking d-irectory) and the path to your directory will be listed, e.g. home/viz2/mse2094/Class96/yourlastname. Your assignment is to create the files already mentioned above and transfer these three files into your directory.

2. Use Netscape or equivalent web browser to download files: md3.in and molec_d.f

You can start at the sciviz home page (http://www.sv.vt.edu) if you wish and select the following sequence to get to the Molecular Dynamics Exercise: Courseware Development, MSE2094, additonal information, Molecular Dynamics and the web page on Understanding Molecualr Dynamics will appear. Scroll down to the flashing Molecular Dynamics Exercise section and you should see five hypertext files:

3. Download files from Netscape

Down load copies of two of these files (molec_dyn.f and md3.in (inside Sample Inputs)) onto your PC, for example select molec-dyn.f and you will see a copy of the Fortran program. With the left mouse button under "File" choose "save as" and a new window should appear. In this window with the left mouse button select the appropriate directory name to store these files. Similarly download md3.in. Notice when you select Sample Inputs you have a choice, select the file named "md3.in" the same as you did with the "molec-dyn.f file". Before we can use these files a few modifications must be made.

With these changes you can now proceed by compiling & debugging either the Fortran77 or Fortran90 versions of the program and than transfering these files into your directory on viz2.sv.vt.edu UNIX workstation.


R.D. Kriz
College of Engineering
Virginia Tech
Revised 04/22/97

http://www.eng.vt.edu/eng/materials/classes/MSE2094_NoteBook/HomeWork/assign7.html