NESC9833 DOT-BPMD.

1. NAME OR DESIGNATION OF PROGRAM:  DOT-BPMD.

3. DESCRIPTION OF PROGRAM OR FUNCTION

DOT-BPMD is a general-purpose,  finite-element, heat-transfer program used to predict thermal environments. The code considers linear and nonlinear transient or steady-state heat conduction in two-dimensional planar or axisymmetric representations of structures. Capabilities are provided for modeling anisotropic heterogeneous materials with temperature-dependent thermal properties and time-dependent temperature, heat flux, convection and radiation boundary conditions, together with time-dependent internal heat generation.

4. METHOD OF SOLUTION:

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Limitations include  the lack of a three-dimensional analysis capability, no radiative or convective internal heat transfer, and the need to maintain a constant time-step in each program execution.

6. TYPICAL RUNNING TIME:

NEA-DB executed the test cases included in this package on a CDC CYBER 740 computer. Required CPU times varied from 0.4 to 1477 seconds depending on the case.

7. UNUSUAL FEATURES OF THE PROGRAM

Strengths of DOT-BPMD include its  ability to account for a wide range of possible boundary conditions, nonlinear material properties, and its efficient equation solution algorithm.

8. RELATED AND AUXILIARY PROGRAMS

DOT-BPMD may be used in the evaluation of steady-state geothermal gradients as well as in the transient heat conduction analysis of repository and waste package subsystems. It may also be used to generate temperature distributions to be used as input to the SCEPTER thermomechanical codes VISCOT (NESC Summary R9846), MATLOC (NESC R9851), and UTAH2 (NESC Summary R9848). In the analysis of the waste package, DOT-BPMD can be used to calculate temperatures for input to the WAPPA, waste package performance assessment program.

10. REFERENCES

- R.M. Polivka and E.L. Wilson
  Finite Element Analysis of Nonlinear Heat Transfer Problems,
  UC SESM 76-2, 1976.

- INTERA Environmental Consulstants, Inc.:
  DOT: A Nonlinear Heat-Transfer Code for Analysis of
  Two-Dimensional Planar and Axisymmetric Representations of
  Structures
  ONWI-420  (April 1983)

11. MACHINE REQUIREMENTS:  64K words.

The test cases ran on a CYBER 740 in 52,000 (octal) words of main storage.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:

NOS2.5.1 (CDC CYBER 740) with compiler FTN4.8+650.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHORS

         R.M. Polivka and E.L. Wilson
         University of California
         Berkeley

         B.M. Thompson and T. Chan
         INTERA Environmental Consultants Inc.

         M.J. Golis
         Office of Nuclear Waste Isolation
         Battelle Project Management Division
         505 King Avenue
         Columbus, Ohio 43201

File name	File description	Records
NESC9833_01.001	information file	63
NESC9833_01.002	DOT-BPMD source program (FORTRAN-66)	2738
NESC9833_01.003	Sample problem 1 input data	31
NESC9833_01.004	Sample problem 2 input data	20
NESC9833_01.005	Sample problem 3 input data	18
NESC9833_01.006	Sample problem 4 input data	19
NESC9833_01.007	Sample problem 5 input data	26
NESC9833_01.008	Sample problem 6 input data	18
NESC9833_01.009	Sample problem 7 input data	22
NESC9833_01.010	Sample problem 8 input data	52
NESC9833_01.011	Sample problem 1b input data	385
NESC9833_01.012	Sample problem 2b input data	448
NESC9833_01.013	Sample problem 1 printed output	280
NESC9833_01.014	Sample problem 2 printed output	228
NESC9833_01.015	Sample problem 3 printed output	253
NESC9833_01.016	Sample problem 4 printed output	401
NESC9833_01.017	Sample problem 5 printed output	244
NESC9833_01.018	Sample problem 6 printed output	262
NESC9833_01.019	Sample problem 7 printed output	375
NESC9833_01.020	Sample problem 8 printed output	572
NESC9833_01.021	Sample problem 1B printed output	1136
NESC9833_01.022	Sample problem 2B printed output	1181