LewInt integrates the ice accretion code LEWICE
(version 3.2.2) with
American Kestrel's user interface, icing analysis tools,
plotting. LEWICE 3.2.2 is a validated ice accretion code
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
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
LewInt is a try-before-you-buy package. The download
listed below is a
fully functioning version of LewInt with LEWICE. The
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 includes various fixes and greater
implementation of LEWICE
thermal analysis capabilities as well as greater use of
will continue to work with the new version. The next
update will only be available if your maintenance is
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.
release of LewInt -
Full version 1.04 released 5/8/2013
Ice Accretion Analysis presentation given at AC9C
Thermal Analysis presentation given at AC9C 11/1/2011
LEWICE example files
- The LEWICE installation discs from NASA
include example LEWICE input and output files as well as
and training material. These are all specific to LEWICE
and not LewInt
but are very useful.
3.2.2 manual -
Searchable version of manual with cover sheet.
Analysis Using Lewice:
Evaluation of Jet Impingement..., AIAA-2004-0062
Comparison of Num. Methods ... Two-Dim. Heat Transfer
.... NASA CR 4202
Manual for the NASA Lewis Ice Accretion/Heat Transfer
Prediction Code with Electrothermal Deicer input -
Papers Using Lewice:
of NASA Thermal Ice Protection Computer Codes (Part 1)
of NASA Thermal Ice Protection Computer Codes (Part 3)
Summary of Validation Results for LEWICE 2.0 ,
Results for LEWICE 2.0, NASA/CR—1999-208690
Results for LEWICE 3.0, NASA/CR—2005-213561
Currently LewInt/LEWICE is available to both US and foreign companies.
It runs on the Microsoft Windows® operating system. Due to changes in
the operating system from Windows XP through the current versions, it
is recommended that the software be "tried" on the intended computer to
verify acceptable operation prior to purchase.
Licensee acknowledges and agrees that the Program(s) are
U.S. laws governing the export and/or re-export of
including, but not limited to, the Export Administration
regulations promulgating financial transaction
administered by the Office of Foreign Asset Controls of
Department of the Treasury, the International Emergency
Act, the United States Export Administration Act, the
Trading with the Enemy Act, and all regulations, orders
Currently checks, wire transfers, or credit cards using
PayPal are accepted for payment. Send email to LEWINT@AmericanKestrelCo.com
purchasing information. LewInt costs
$2,500USD for a
single permanent license with one year of maintenance
and updates. A
block of five licenses can be purchasd for $10,000USD.
One year of
mainentance is $600USD per license. Purchases can be
completed via Credit Card using PayPal.
Pricing is valid for sales
that do not require any seller registration or
qualification, or seller certifications with the purchasing company.
Download the self expanding file containing
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
it would be best if you used the default locations for
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
select the tutorial checkbox. Follow the instructions in
and when you set the analysis path set it to the
You can turn off the tutorial at any time by closing it
the tutorial box on the main menu.
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
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
license from the U.S. Government, National Aeronautics
Administration or NASA.
- Computational engine is validated ice accretion code
- 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