Temperature distribution for an arbitrary irregular body is calculated by AUTOTEM, which generates required input data automatically by computer. Temperature distribution is calculated for a two-dimensional plane section in /x,y/ coordinates or for an axisymmetric irregular body in /r,z/ coordinates

Lee, A. Y.

Wells, K. J.

English

NASA Technical Reports Server

February 1971	 Brief 71-10039 
•	 5tIvco.? 
(?	 AEC-NASA TECH BRIEF 
YES	 Space Nuclear Systems Office
	 W 
AEC-NASA Tech Briefs announce new technology derived from the research and development program of the U.S. 
AEC or from AEC-NASA interagency efforts. They are issued to encourage commercial application. Tech Briefs are 
available on a subscription basis from the National Technical Information Service, Springfield, Virginia 22151. Requests 
for individual copies or questions relating to the Tech Brief program may be directed to the Technology Utilization 
Office, NASA, Code KT, Washington, D.C. 20546. 
(AUTOTEM) Automated Geometry Meshing and Heat Conduction Calculation 
The problem: 
To calculate a temperature distribution for an 
arbitrary irregular body by finite difference solution, 
the body must first be divided into a finite number of 
lumped masses or nodal points. The majority of the 
input data required for the analysis describes the 
physical nodal system. Preparing these input data was 
previously done manually. This procedure was time 
consuming and error prone. 
The solution: 
AUTOTEM generates the required input data auto-
matically by computer and calculates the temperature 
distribution for a two-dimensional plane section in 
(x,y) coordinates or for an axisymmetric irregular 
body in (r, z) coordinates. 
Ho it's done: 
AUTOTEM consists of four major sections: (1) 
meshing the peripheral nodes by MESHER, (2) gen-
erating the regular interior nodes and input data re-
quired by the TOSS or TAP-A temperature calcula-
tion codes, (3) calculating the temperature 
distributions, and (4) plotting the general nodal net-
work and isotherms. The data generated from each 
section are stored on tape and punched on cards. The
execution of the problem can be stopped at the end of 
any section, if desired. 
Notes: 
1. The AUTOTEM code can handle any two-dimen-
sional (constant in the third dimension) or axisym-
metric body consisting of a single material. Time 
dependent internal heat generation, temperature 
dependent material thermal properties, and time 
dependent boundary conditions can be considered. 
2. This program is written in FORTRAN IV and 
Assembly languages for use on the CDC-6600, 64K 
computer. 
3. The plot programs used are from a standard pro-
gram package for the SC-4020 CRT data plotter. 
4. Inquiries concerning this program may be directed 
to:
COSMIC 
Barrow Hall 
University of Georgia 
Athens, Georgia 30601 
Source: Allan Y. Lee, and Kenneth J. Wells of

Westinghouse Astronuclear Laboratory

under contract to

AEC-NASA Space Nuclear Systems Office

(NUC-10241) 
Category 09 
This document was prepared under the sponsorship of the Atomic 
Energy Commission and/or the National Aeronautics and Space 
Administration. Neither the United States Government nor any per-
son acting on behalf of the United States Government assumes any
liability resulting from the use of the information contained in this 
document, or warrants that the use of any information, apparatus, 
method, or process disclosed in this document may not infringe pri-
vately owned rights.
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AUTOTEM - Automated geometry meshing and heat conduction calculation

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