Free-Lagrange advection slide lines
We have found the treatment of interfaces in staggered-grid hydrodynamics to be inadequate for problems with large shear deformation at material interfaces. The problem is especially evident at the intersections of multiple materials, but potentially occurs at all interfaces with large shear. To address this problem, we have introduced a two-way advection slide line algorithm into our free-Lagrange (FL) method. In addition to the interface physics itself, the algorithm involves an interface stiffener, a mesh relaxation and advection scheme suitable or unstructured meshes (FLALE), the FL mesh refinement algorithms (FLAMR), and special connectivity templates. For a slide test problem, the FL results are qualitatively similar to those of a Lagrange slide line treatment, but differ significantly in one area. At this time there is no firm basis for judging which is the correct solution. 15 refs., 11 figs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6704536
- Report Number(s):
- UCRL-JC-104257; CONF-9006195--3; ON: DE90015043
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
657002 -- Theoretical & Mathematical Physics-- Classical & Quantum Mechanics
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ADVECTION
ALGORITHMS
BOUNDARY LAYERS
COMPUTER CALCULATIONS
COMPUTERIZED SIMULATION
DEFORMATION
FLUID MECHANICS
HYDRODYNAMICS
INTERFACES
LAYERS
MASS TRANSFER
MATHEMATICAL LOGIC
MECHANICS
MESH GENERATION
SHEAR
SIMULATION
SURFACES