Numerical solution of one dimensional two-phase drift flux equations with a blend of partially and fully implicit methods. [BWR; PWR]

Conference · Sat Jan 01 00:00:00 EST 1977

OSTI ID:7318046

Mahaffy, J H; Liles, D R

A numerical method for treating two-phase flow in pipes is presented which incorporates the use of a partially implicit scheme in regions of relatively low flow velocity and a fully implicit treatment in regions of high velocity. This method takes advantage of the lower cost per iteration of the partially implicit scheme, without being limited by its conditional stability. Applications of this approach to water reactor blowdown calculations produce reductions in computer time by factors of 2 to 4 without a significant loss of accuracy.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7318046
• Report Number(s): LA-UR-77-57; CONF-770304-5; TRN: 77-006244
• Resource Relation: Conference: Analysis of nuclear systems, Tucson, AZ, USA, 28 Mar 1977
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
42 ENGINEERING
BLOWDOWN
TWO-PHASE FLOW
BWR TYPE REACTORS
PWR TYPE REACTORS
FLUID FLOW
NUMERICAL SOLUTION
ONE-DIMENSIONAL CALCULATIONS
REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
210100 - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
420400 - Engineering- Heat Transfer & Fluid Flow