Connectivity structures and differencing techniques for staggered-grid free-Lagrange hydrodynamics

Conference · Mon Jun 01 00:00:00 EDT 1992

OSTI ID:7047398

Burton, D E

We consider a variation of the free-Lagrange (FL) method which is appropriate to staggered-grid differencing of the hydrodynamics equations (SGH) and will be termed the staggered free-Lagrange method or SFL. The SFL method discretizes space into general polygonal or polyhedral cells. The numerical differencing techniques and connectivity templates used for SFL differ markedly from those used by other unstructured grid methods, such as finite element (FE) and triangular/tetrahedral based free-Lagrange (TFL). The paper discusses the spatial discretization for both 2D and 3D geometry, differencing templates, object-oriented data management, and mesh optimization and refinement strategies. The suite of mesh optimization primitives is extended, giving rise to a powerful hybrid method called adaptive free-Lagrange (AFL) which is applied to a test problem.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7047398
• Report Number(s): UCRL-JC-110555; CONF-9206185-7; ON: DE92017313
• Resource Relation: Conference: 7. International Association of Mathematics and Computer Simulation (IMACS) international conference on computer methods for partial differential equations, New Brunswick, NJ (United States), 22-24 Jun 1992
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
FLOW MODELS
MESH GENERATION
CALCULATION METHODS
FINITE ELEMENT METHOD
FLUID FLOW
HYDRODYNAMICS
FLUID MECHANICS
MATHEMATICAL MODELS
MECHANICS
NUMERICAL SOLUTION
665000* - Physics of Condensed Matter- (1992-)
990200 - Mathematics & Computers