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MPA Division   :  Condensed Matter and Magnet Science Group
AET Division   :  Non-destructive Test and Evaluation Group
Thermoacoustics   : DeltaEC 


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1993 Technical Abstract

Users Guide

Revision history

Known bugs

Current version is 6.2b3(Mac,9-Jan-09) 6.3b11(Win,18-Feb-12)






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Design Environment for Low-amplitude ThermoAcoustic Energy Conversion.

This is the central access point for the information related to our program DeltaEC (Design Environment for Low-amplitude ThermoAcoustic Energy Conversion).

DeltaEC can predict how a given thermoacoustic apparatus will perform, or can allow the user to design an apparatus to achieve desired performance. DeltaEC is useful to researchers in physical acoustics and especially thermoacoustics.

The code numerically integrates a one-dimensional wave equation appropriate to a user-defined geometry in a user-selected gas or liquid. DeltaEC is capable of handling complex geometric configurations and specialized acoustic elements including resonators, duct networks, and complete thermoacoustic engines, electroacoustically driven thermoacoustic refrigerators, and thermoacoustic mixture separators.

Source code for DeltaEC is not available to the public. We have instead made executable code available for common computers. Compiled DeltaEC executable files, example files, and release notes are available for the platforms listed in the column to the left.

This program was prepared by Los Alamos National Security, LLC at Los Alamos National Laboratory (LANL) under contract No. DE-AC52-06NA25396 with the U.S. Department of Energy (DOE). All rights in the program are reserved by the DOE and Los Alamos National Security, LLC. Permission is granted to the public to copy and use this software without charge, provided that this Notice and any statement of authorship are reproduced on all copies. Neither the U.S. Government nor LANS makes any warranty, express or implied, or assumes any liability or responsibility for the use of this software.

A two-page introduction to DeltaEC's decade-old core capabilities is available, and the current Users Guide (which is also included in the installation package) explains current capabilities. The Users Guide requires Adobe Acrobat Reader, version 6 or later.

Experienced users can review the recent revision history and a list of known bugs.

The final version of the now-obsolete DeltaE, version 5.5b6 (dating to 2007), is available here. It has only one known bug, in the calculation for PISTBRANCH, and it has two features --- Flip and SYSEXEC --- that are not yet implemented in DeltaEC. However, DeltaE 5.5b6 has a very primitive user interface and no steady-flow or mixture-separation capabilities.

Please help us by reporting difficulties to the email address at the bottom of this web page. Describe the problem, the DeltaEC version number, and whether you are running it on a pc or a Mac. Attach a minimal test file demonstrating the problem, if possible. If DeltaEC gave you a message about the problem, please send it to us. Most such messages are recorded in DeltaEC.exe.log, which you can find in DeltaEC's installation folder.

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Last Modified: <12 November 2015>
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