Multigrid iteration solution procedure for solving two-dimensional sets of coupled equations. [HTGR]

Technical Report · Sun Jul 01 00:00:00 EDT 1984

DOI:https://doi.org/10.2172/6558104· OSTI ID:6558104

Vondy, D. R.

A procedure of iterative solution was coded in Fortran to apply the multigrid scheme of iteration to a set of coupled equations for solving two-dimensional sets of coupled equations. The incentive for this effort was to make available an implemented procedure that may be readily used as an alternative to overrelaxation, of special interest in applications where the latter is ineffective. The multigrid process was found to be effective, although not always competitive with simple overrelaxation. Implementing an effective and flexible procedure is a time-consuming task. Absolute error level evaluation was found to be essential to support methods assessment. A code source listing is presented to allow simple application when the computer memory size is adequate, avoiding data transfer from auxiliary storage. Included are the capabilities for one-dimensional rebalance and a driver program illustrating use requirements. Feedback of additional experience from application is anticipated.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6558104
• Report Number(s): ORNL/TM-9030; ON: DE84016554
• Resource Relation: Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
HTGR TYPE REACTORS
REACTOR CORES
HEAT TRANSFER
HYDRAULICS
COMPUTER CALCULATIONS
FUEL ASSEMBLIES
GAS FLOW
ITERATIVE METHODS
TWO-DIMENSIONAL CALCULATIONS
ENERGY TRANSFER
FLUID FLOW
FLUID MECHANICS
GAS COOLED REACTORS
GRAPHITE MODERATED REACTORS
MECHANICS
REACTOR COMPONENTS
REACTORS
210300* - Power Reactors
Nonbreeding
Graphite Moderated