Simulation of three-dimensional, time-dependent, incompressible flows by a finite element method
A finite element model has been developed for simulating the dynamics of problems encountered in atmospheric pollution and safety assessment studies. The model is based on solving the set of three-dimensional, time-dependent, conservation equations governing incompressible flows. Spatial discretization is performed via a modified Galerkin finite element method, and time integration is carried out via the forward Euler method (pressure is computed implicitly, however). Several cost-effective techniques (including subcycling, mass lumping, and reduced Gauss-Legendre quadrature) which have been implemented are discussed. Numerical results are presented to demonstrate the applicability of the model.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6515237
- Report Number(s):
- UCRL-85226; CONF-810664-1
- Country of Publication:
- United States
- Language:
- English
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54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
DATA
DIFFUSION
ENVIRONMENTAL TRANSPORT
FINITE ELEMENT METHOD
FLUID FLOW
GASEOUS WASTES
INFORMATION
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
NUMERICAL DATA
NUMERICAL SOLUTION
POLLUTION
RADIOACTIVE EFFLUENTS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
THEORETICAL DATA
TOPOGRAPHY
WASTES