Flow-through boundary conditions for time-dependent, buoyancy-influenced flow simulations using low order finite elements

Technical Report · Sat Jan 01 00:00:00 EST 1983

OSTI ID:5979547

Leone, Jr, J M; Gresho, P M; Lee, R L; Sani, R L

Two methods are presented to extend the utility of outflow natural boundary conditions from isothermal flows to those in which an additional vertical pressure gradient, associated with buoyancy-influenced flows, is important. Each of these methods approximates the pressure contribution to the natural boundary conditions in a time-dependent way. The methods are derived and demonstrated in two-dimensions and the extension to three-dimensions is discussed.

• Research Organization: Los Alamos National Lab., NM (USA); Cooperative Inst. for Research in Environmental Science, Boulder, CO (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5979547
• Report Number(s): UCRL-88103; CONF-830803-9; ON: DE83010256
• Resource Relation: Conference: 3. international conference on numerical methods in laminar and turbulent flow, Seattle, WA, USA, 8 Aug 1983; Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
EARTH ATMOSPHERE
FLUID FLOW
FLOW MODELS
ANALYTICAL SOLUTION
BOUNDARY CONDITIONS
MATHEMATICAL MODELS
THEORETICAL DATA
TIME DEPENDENCE
TWO-DIMENSIONAL CALCULATIONS
DATA
INFORMATION
NUMERICAL DATA
640200* - Atmospheric Physics
990200 - Mathematics & Computers