PSR-0522 TRUMP.

1. NAME OR DESIGNATION OF PROGRAM:  TRUMP.

3. DESCRIPTION OF PROGRAM OR FUNCTION

TRUMP solves a general nonlinear parabolic partial differential equation describing flow in various kinds of potential fields, such as fields of temperature, pressure, or electricity and magnetism; simultaneously, it will solve two additional equations representing, in thermal problems, heat production by decomposition of two reactants having rate constants with a general Arrhenius temperature dependence. Steady-state and transient flow in one, two, or three dimensions are considered in geometrical configurations having simple or complex shapes and structures. Problem parameters may vary with spatial position, time, or primary dependent variables, temperature, pressure, or field strength. Initial conditions may vary with spatial position, and among the criteria that may be specified for ending a problem are upper and lower limits on the size of the primary dependent variable, upper limits on the problem time or on the number of time-steps or on the computer time, and attainment of steady state.

4. METHODS

Solutions may be obtained by use of explicit or implicit-difference equations, or by an optimized combination of both.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The program currently provides for maxima of 40 materials, 5 reactants, 150 surface conditions, 20 boundary nodes and 16 entries per tabulated function (table-length).

6. TYPICAL RUNNING TIME

Running time is strongly dependent on the complexity of the problem. Calculation of all 16 sample problems required approximately 144 CP seconds on a CDC7600. Execution time averages from 0.3 to 2 milliseconds per time-step for each nodal point and connection between nodal points.   The sample problems execute in seconds on a DELL Pentium IV 2.8 GHz.

10. REFERENCES

Background reference:
- A.L. Edwards, "A Compilation of Thermal Property Data for Computer Heat-Conduction Calculations," UCRL-50589 (February 24, 1969).
- D. A. Schauer, "FED: A Computer Program to Generate Geometric Input for the Heat-Transfer Code TRUMP," UCRL-50816 Rev. 1 (January 12, 1973).

- A. L. Edwards:
"TRUMP: A Computer Program for Transient and Steady-State Temperature
Distributions in Multidimensional Systems," UCRL-14754 Rev. 3 (no NUREG
number assigned) (September 1, 1972).

11. HARDWARE REQUIREMENTS

TRUMP includes a version that runs on Pentium computers under WindowsXP as well as the original CDC 7600 and IBM 360 mainframe versions. As dimensioned, the program requires 145,100 (octal) words on a CDC7600.

13. SOFTWARE REQUIREMENTS

TRUMP was developed on CDC 7600 under SCOPE 2.1.5. It was converted to run under OS/360 on IBM360 and under OS/370 on IBM370. The code was not tested or modified when it was transferred to RSICC through the ESTSC and re-released in 2003. Modifications will certainly be required to run on newer computers.
  
RSICC compiled and tested TRUMP-PC on a on a Dell Pentium IV 2.8 GHz running Windows XP SP 2. The executable included in the package was created using Lahey/Fujitsu Fortran 95 Release 5.70C.

15. NAME AND ESTABLISHMENT OF AUTHORS

Contributed by:
   Radiation Safety Information Computational Center
   Oak Ridge National Laboratory
   Oak Ridge, Tennessee, U. S. A.

Developed by:   
   TRUMP- CDC and TRUMP-IBM: Lawrence Livermore National Laboratory,
   Livermore, California, U. S. A.
   and Oak Ridge National Laboratory, Oak Ridge, Tennessee,
   through the Energy Science and Technology Software Center,
   Oak Ridge, Tennessee, U. S. A.
  
   TRUMP-PC: Battelle Columbus, Columbus, Ohio. U. S. A.

CDC and IBM versions:
Fortran Source
Sample Problem Input
Material Properties Library 1
Material Properties Library 2
Material Properties Library 3
Materials Index
For PC: Fortran source files, Assembler for mainframe, a PC executable,test case

Electronic documentation