transparent spacer
Los Alamos National Laboratory Go to the Lab's home page Search for people in the Lab's phone book Search the Laboratory's Web site
transparent spacer
MPA Division   :  Condensed Matter and Magnet Science Group
AET Division   :  Non-Destructive Testing and Evaluation Group
Thermoacoustics   : Educational Animations  

Educational Animations for Thermoacoustics

transparent spacer


Vertical Line 
Thermoacoustic Animations for MS-DOS

These are compiled QuickBasic programs showing animations of thermoacoustic processes. Be sure to read the text file associated with each animation so that you will be able to interpret what you see on the screen.

To obtain a complete set of the animations Oscwall, Viscous, Wave, Thermal, PTR, TADOPTR, Meanflow, Standing, and TASHE, including clickable Win-95, Win-98, and Win-2K icons, download and extract the archive AnZip.exe.

To obtain the animation TasheOptr, which describes the physics behind the "500 gallon/day" thermoacoustic natural-gas liquefier, whose final status is described here, download and extract the archive TasheOpZ.exe.

To obtain the animation MixSep, which describes the physics behind thermoacoustic mixture separation, download and extract the archive MixSepZip.exe.

Note that some Windows-2000 systems require use of the *W2k.pif shortcuts provided here to start the animations, but other Windows-2000 systems, most Windows-XP systems, and some Windows Vista allow the user to click on the DOS executables *.exe directly.

In other cases, including Macs, use DOSBox, which is free program for running old DOS games and other visually interesting programs on computers that don't automatically support DOS. Here's how:

Download and unzip our self-extracting zip files (such as AnZip.exe). On a Mac, use StuffItExpander (free). Discard the *.pif files that result from the unzipping, keeping only the DOS folder and its contents, and the readme.txt file. Put these in an otherwise empty folder in your computer. It is easiest if you name your folder something with 8 characters or less, such as bookanim or dos or dosanims, avoiding spaces or punctuation.

Go to , get the installation package for your operating system, and install it. (Stay ready to consult with the on-line DOSBox documentation if the following brief instructions are insufficient.)

The first time you run DOSBox, it should open a window with a prompt
To gain access to the animations, you must "mount" the folder containing them, which requires knowing the full path to the folder name. In this example from my Windows-Vista pc, the path is c:\users\greg\Desktop\bookanim. This can be "mounted" in DOSBox using any DOSBox drive letter other than Z. I'll use T in this example. When I type this in the DOSBox window:
mount t c:\users\greg\Desktop\bookanim

DOSBox responds with
Drive T is mounted as local directory c:\users\greg\Desktop\bookanim

to show its success. Now type

to change DOSBox's focus to this location. You can type

to see a list of the animations (*.exe) and text-file descriptors (*.txt) of them.) To run an animation, simply type its name and follow its instructions, if any.

[On a Mac, when an animation asks you to "hit any key" (either starting the animation or returning to the system at the end), you can avoid an intermittent sticky-key syndrome by using "Return" (= "Enter" on a pc keyboard) instead of any other key. Unfortunately, if you run Ani. Standing (with no option), there is no substitute for the space bar to get past the start-up display, and it tends to be sticky. Try to hit it as quickly as possible. ]

When you're back to the T:\> prompt after one animation closes, you can run another by typing its name.

The most difficult part of using DOSBox for the first time may be figuring out the path. In a Windows system, if you're not sure of the full path of your folder, you can right-click the folder and choose Properties\General to see the full path. (The full path of the Desktop may not otherwise be obvious.) Folders with blanks or with more than 8 characters are handled differently in DOSBox. For example, c:\Users\My Documents\bookanim would be mounted in DOSBox as c:\users\mydocu~1 On a Mac, the symbol "~" indicates the current user's home directory, and it can be used in the DOSBox path, so, if you put the animations folder on your desktop, DOSBox should respond correctly to something like mount t ~/desktop/bookanim

Finally: After you've verified the operation of the animations with DOSBox on your computer, you can configure DOSBox so it will automatically mount the bookanim folder when DOSBox starts. To do this, search your computer for *.conf to find the the DOSBox configuration file (e.g., dosbox-0.74.conf, which showed up in the \users\greg\appdata\local\DOSBox folder in my Windows Vista pc). Open the configuration file in a text editor, and look near the bottom for the [autoexec] section. Below the line [autoexec], add these lines:
mount t c:\users\greg\Desktop\bookanim

We have not yet completed the conversion of these animations to a good platform-independent software package that preserves the interactive format.

If you have come to this page seeking the slightly different set of animations that go with the book Thermoacoustics: A unifying perspective for some engines and refrigerators, go instead to Thermoacoustics Textbook

transparent spacer

transparent spacer MPA Division | AET Division

Los Alamos National Laboratory

Operated by LANS for the US Department of Energy's National Nuclear Security Administration
LANL Home swift at lanl dot gov (Help fight spam: replace "at" with [you-know-what].) | Regarding copyright, privacy, disclaimers,...

Last Modified: <22-Sept-2011>
transparent spacer transparent spacer