Adaptive mesh techniques for unsteady multigradient problems in computational fluid dynamics

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5923679

Bartel, T J

An adaptive grid algorithm has been developed for the purpose of simulating highly nonlinear and unsteady 1-D problems in computational fluid dynamics with high-gradient regions in one or more physical quantities. The equidistribution principle was used to determine the updated mesh location. Smoothing of the distribution and minimum mesh size control was included in the algorithm. The method was tested against a simple propagating shock, a shock tube, an interacting blast wave, and a radiation hydrodynamic blast wave. The transformed governing equations for these problems were cast in a strong conservative form; a control volume formulation using first-upwind differencing was used to develop the difference equations. This simple numerical method coupled with an adaptive mesh resolved high-gradient regions very well, but difficulties occurred with the simulation of both the rarefaction fan and a shock region.

• Research Organization: Wisconsin Univ., Madison (USA)
• OSTI ID: 5923679
• Country of Publication: United States
• Language: English

Related Subjects

640410* -- Fluid Physics-- General Fluid Dynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
99 GENERAL AND MISCELLANEOUS
990210 -- Supercomputers-- (1987-1989)
ALGORITHMS
COMPUTERIZED SIMULATION
FLUID FLOW
FLUID MECHANICS
MATHEMATICAL LOGIC
MECHANICS
MESH GENERATION
NONLINEAR PROBLEMS
ONE-DIMENSIONAL CALCULATIONS
SIMULATION
UNSTEADY FLOW