LewInt integrates the ice accretion code LEWICE (version 3.2.2) with
American Kestrel's user interface, icing analysis tools, and automated
plotting. LEWICE 3.2.2 is a validated ice accretion code developed by
NASA Glenn Research Center.
new license agreement, with NASA Glenn, allowing distribution of LEWICE
version 3.2.2 was executed on 6/11/14.
American Kestrel is accepting new international orders for the
integrated ice accretion suite LewInt, including LEWICE version 3.2.2.
LEWICE version 3.2.2 is made available under a copyright license from
the U.S. Government, National Aeronautics and Space Administration or
LewInt is a try-before-you-buy package. The download listed below is a
fully functioning version of LewInt with LEWICE. The software comes
with a 15 day trial period but includes some reminders that pop up
everytime LewInt and LEWICE is run. Once down loaded and installed the
trial version can be converted to a purchased version by inputing a
Version 1.04 released:
version includes various fixes and greater implementation of LEWICE
thermal analysis capabilities as well as greater use of external CFD
Previously installed licenses
will continue to work with the new version. The next update will only be available if your maintenance is current.
If you have previously
installed an earlier version of LewInt and the trial period expired you will get another two
weeks when installing this version.
Current release of LewInt - Full version 1.04 released 5/8/2013
LewInt: Ice Accretion Analysis presentation given at AC9C 5/5/2009
LewInt: Thermal Analysis presentation given at AC9C 11/1/2011
NASA LEWICE example files - The LEWICE installation discs from NASA
include example LEWICE input and output files as well as some papers
and training material. These are all specific to LEWICE and not LewInt
but are very useful.
LEWICE 3.2.2 manual - Searchable version of manual with cover sheet.
Various Thermal Analysis Using Lewice:
An Evaluation of Jet Impingement..., AIAA-2004-0062
A Comparison of Num. Methods ... Two-Dim. Heat Transfer .... NASA CR 4202
Users Manual for the NASA Lewis Ice Accretion/Heat Transfer Prediction Code with Electrothermal Deicer input - NASA CR4530
Validation Papers Using Lewice:
Validation of NASA Thermal Ice Protection Computer Codes (Part 1) NASA TM107397
Validation of NASA Thermal Ice Protection Computer Codes (Part 3) NASA TM2001-210907
A Summary of Validation Results for LEWICE 2.0 , NASA/CR—1998-208687
Validation Results for LEWICE 2.0, NASA/CR—1999-208690
Validation Results for LEWICE 3.0, NASA/CR—2005-213561
LewInt/LEWICE is available to both US and foreign companies.
Licensee acknowledges and agrees that the Program(s) are subject to
U.S. laws governing the export and/or re-export of Program(s)
including, but not limited to, the Export Administration Regulations,
regulations promulgating financial transaction restrictions
administered by the Office of Foreign Asset Controls of the U.S.
Department of the Treasury, the International Emergency Economic Powers
Act, the United States Export Administration Act, the United States
Trading with the Enemy Act, and all regulations, orders and licenses
Currently checks, wire transfers, or credit cards using PayPal are accepted for payment. Send email to LEWINT@AmericanKestrelCo.com for
purchasing information. As of January 1, 2015 LewInt is $2200USD for a
single permanent license with one year of maintenance and updates. A
block of five licenses can be purchasd for $8,400USD. One year of
mainentance is $550USD per license. Purchases can now be completed via Credit Card using PayPal.
Download the self expanding file containing the LewInt release. Extract the files into a temporary directory. You will need to
execute two installer files. The first LewInt_install.exe installs
both the interface and the Matlab libraries required for the interface, it would be best if you used the default locations for the program.
Then execute LewIntExample.msi to install some example files, it would be best to use the default location here as well.
now ready to run LewInt. There should be both a desktop and start menu
shortcuts for LewInt. Start LewInt, it takes a while to load, and
select the tutorial checkbox. Follow the instructions in the tutorial
and when you set the analysis path set it to the c:/examples directory.
You can turn off the tutorial at any time by closing it or un-checking
the tutorial box on the main menu.
I have tried the installation
and software on XP service pack 2 and 3 as well as Vista and System 7. The licensing
code periodically tells you that it is an unlicensed version and allows
you to click through to continue. This happens with every run of Lewice
as well as when you start and close LewInt. Once you have purchased a
license this will disappear. Email me with any questions you have.
To be added to future mailings about LEWINT please email: LEWINT@AmericanKestrelCo.com.
LEWINT features include:
LEWICE version 3.2.2 is made available under a copyright
license from the U.S. Government, National Aeronautics and Space
Administration or NASA.
- Computational engine is validated ice accretion code LEWICE 3.2.2
- International availability
- LEWICE executable is un-altered
- LEWICE widely accepted by regulatory authorities (User must verify acceptance)
- Graphical user interface simplifying use for beginning and experienced user
- Tutorial mode
- Technical support provided by experienced user
- On-site training available
- User input validation and range checking
- Raw LEWICE input and data files saved
- A matrix of up to 64 runs may be prepared
- Automated plotting with titles generated from conditions run