last modified: 01-JUN-1975 | catalog | categories | new | search |

NESC0586 PLENUM

PLENUM, Bulk Flow Distribution in Cylindrical Reactor Coolant Inlet Plenum, Potential Flow

top ]
1. NAME OR DESIGNATION OF PROGRAM:  PLENUM
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
PLENUM NESC0586/01 Tested 01-JUN-1975

Machines used:

Package ID Orig. computer Test computer
NESC0586/01 IBM 370 series IBM 370 series
top ]
3. DESCRIPTION OF PROBLEM OR FUNCTION

Bulk flow distribution in a cylindrical reactor coolant inlet plenum is calculated using potential flow theory.
top ]
4. METHOD OF SOLUTION

The Laplace equation for the velocity potential is solved for general, symmetric boundary conditions and one inlet nozzle by Gauss-Seidel relaxation (part 1). Nonsymmetric, dimensional solutions are then formed by superposition of the general solution (part 2).
top ]
5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The code is dimensioned for 8000 mesh points in an (r,theta,z) array. Dimensions can be expanded at the expense of run time and core size.
top ]
6. TYPICAL RUNNING TIME

Run time for part 1 is proportional to n**2,  where n is the number of mesh points. With 2299 mesh points CPU time is 42 seconds on a 360/195. Run time for part 2 is 1 second per problem. Sample problem running time is 2 minutes for part 1 and 1 minute for part 2.
top ]
7. UNUSUAL FEATURES OF THE PROGRAM

The code approximates bulk fluid motion through large cylindrical headers in circumstances where details of the flow, such as boundary layer effects, may be neglected. Three-dimensional effects are calculated, so that asymmetric fluid input and output problems may be calculated. Use of a linear field equation permits rapid solution by superposition of many combinations of input and output boundary conditions. First order effects of friction may be included by addition of constant coefficients in the finite difference formulations.
top ]
8. RELATED AND AUXILIARY PROGRAMS:
top ]
9. STATUS
Package ID Status date Status
NESC0586/01 01-JUN-1975 Tested at NEADB
top ]
10. REFERENCE

S. D. Harris and J. W. Reece, Application of Potential
Flow Theory  to Reactor  Coolant Circulation,  Proceedings of  the
Eighth  Southeastern  Seminar on  Thermal  Sciences,  DP-MS-71-13,
March 23-24, 1972.
top ]
11. MACHINE REQUIREMENTS:  240K bytes of storage and an on-line punch and printer.
top ]
12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC0586/01 FORTRAN-IV
top ]
13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:   OS/360.
top ]
14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

PLENUM  is written as two separate programs. Part 1 provides a general dimensionless solution to the field equation. For a given header this code need only be executed once. Part 2 uses punched output from part 1 to determine solutions for a variety of user-specified boundary conditions by dimensionalization and superposition.
top ]
15. NAME AND ESTABLISHMENT OF AUTHOR

                 S. D. Harris
                 Savannah River Laboratory
                 E. I. duPont de Nemours and Company, Inc.
                 Aiken, South Carolina  29801
top ]
16. MATERIAL AVAILABLE
NESC0586/01
File name File description Records
NESC0586_01.001 PART 1 - SOURCE PROGRAM (F4) 312
NESC0586_01.002 PART 1 - SAMPLE PROBLEM DATA 3
NESC0586_01.003 PART 1 - SAMPLE PROBLEM PRINTED OUTPUT 510
NESC0586_01.004 PART 2 - SOURCE PROGRAM (F4) 220
NESC0586_01.005 INFORMATION 2
NESC0586_01.006 PART 2 - SAMPLE PROBLEM DATA 435
NESC0586_01.007 PART 2 - SAMPLE PROBLEM PRINTED OUTPUT 538
top ]
17. CATEGORIES
  • H. Heat Transfer and Fluid Flow

Keywords: Laplace equation, coolants, cylinders, potential flow, r-theta-z.