last modified: 01-APR-1979 | catalog | categories | new | search |

NESC0525 ORTHIS-ORTHAT.

ORTHIS, Steady-State Heat Conduction in 2-D X-Y, R-Z and R-Theta Geometry
ORTHAT, Transient Heat Conduction in 2-D X-Y, R-Z and R-Theta Geometry

top ]
1. NAME OR DESIGNATION OF PROGRAM:  ORTHIS/ORTHAT
top ]
2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
Program name Package id Status Status date
ORTHIS-ORTHAT NESC0525/01 Tested 01-APR-1979

Machines used:

Package ID Orig. computer Test computer
NESC0525/01 IBM 360 series IBM 360 series
top ]
3. DESCRIPTION OF PROBLEM OR FUNCTION

ORTHIS and ORTHAT are designed  to solve steady-state and transient heat conduction problems, respectively, in two-dimensional geometries. Either Cartesian (x-y)  or cylindrical (r-z, r-theta) coordinate systems may be used. Thermal properties, heat generation rates, and boundary conditions may be functions of position, time, or temperature.
top ]
4. METHOD OF SOLUTION

ORTHIS   uses   the   iterative   method   of
successive overrelaxation  to solve the steady-state  problem.  In
addition  to overrelaxation  it  also  uses a  dominant-error-mode
extrapolation  procedure  to  increase the  rate  of  convergence.
ORTHAT uses  a modified  alternating-direction implicit  method to
solve the transient problem.  The input for both programs has been
designed in an easily usable free-form style.
top ]
5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maxima of -
    1000 vertical nodes
    1000 horizontal nodes
   10000 total nodes (rows*columns)
      50 vertical regions
      50 horizontal regions
    2500 total regions (rows*columns)
     300 materials
    1500 steady-state iterations
    5000 transient time-steps
top ]
6. TYPICAL RUNNING TIME:  Both programs execute in 2 to 3 minutes.
top ]
7. UNUSUAL FEATURES OF THE PROGRAM:
top ]
8. RELATED AND AUXILIARY PROGRAMS:
top ]
9. STATUS
Package ID Status date Status
NESC0525/01 01-APR-1979 Tested at NEADB
top ]
10. REFERENCES:
NESC0525/01, included references:
- R.C. Durfee and C.W. Nestor, Jr.:
  ORTHIS, ORTHAT - Two Computer Programs for Solving Two-dimensional
  Steady-state and Transient Heat Conduction Problems
  ORNL-TM-3324 (July 1971).
- ACC Programming Note 73-3 (July 31, 1972).
top ]
11. MACHINE REQUIREMENTS:  ORTHIS requires 700K, ORTHAT requires 1024K
bytes.
top ]
12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC0525/01 FORTRAN-IV
top ]
13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:   OS/360.
top ]
14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

Problems may be partially run and then restarted.  The printout is
made as  readable as possible and  includes a picture of  the mesh
assembly and temperature distributions and profiles.
top ]
15. NAME AND ESTABLISHMENT OF AUTHORS

                 R. C. Durfee and C. W. Nestor, Jr.
                 Oak Ridge National Laboratory
                 P. O. Box X
                 Oak Ridge, Tennessee  37830
top ]
16. MATERIAL AVAILABLE
NESC0525/01
File name File description Records
NESC0525_01.001 INFORMATION 11
NESC0525_01.002 SUBROUTINE ERROR (F4,EBCDIC) 8
NESC0525_01.003 SUBROUTINE ERROR (ASSEMBLER,EBCDIC) 552
NESC0525_01.004 SUBROUTINES (ASSEMBLER,EBCDIC) 395
NESC0525_01.005 ORTHIS -- SOURCE PROGRAM (F4,EBCDIC) 6844
NESC0525_01.006 ORTHIS -- SAMPLE PROB. INPUT DATA 36
NESC0525_01.007 ORTHIS -- SAMPLE PROB. PRINTED OUTPUT 480
NESC0525_01.008 ORTHIS -- JCL 38
NESC0525_01.009 ORTHAT -- SOURCE PROGRAM (F4,EBCDIC) 7200
NESC0525_01.010 ORTHAT -- SAMPLE PROB. INPUT DATA 57
NESC0525_01.011 ORTHAT -- SAMPLE PROB. PRINTED OUTPUT 1089
NESC0525_01.012 ORTHAT -- JCL 41
top ]
17. CATEGORIES
  • H. Heat Transfer and Fluid Flow

Keywords: fuel elements, heat transfer, r-theta, steady-state conditions, temperature dependence, thermal conductivity, time dependence, transients, two-dimensional, x-y.