Accession Number : ADA310339

Title :   Application of Smoothed Particle Hydrodynamics to Fluid Flow Involving Solid Boundaries.

Descriptive Note : Technical rept.,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB

Personal Author(s) : McCormick, C. S. ; Miller, T. F.

PDF Url : ADA310339

Report Date : JUN 1996

Pagination or Media Count : 46

Abstract : Smoothed particle hydrodynamics (SPH) is a non-Monte Carlo free-Lagrangian method of computational fluid dynamics that has recently expanded in scope beyond its parent application of astrophysical simulations. Modelling terrestrial flows involving boundaries is an important extension of the technique. This thesis describes the application of SPH to model compressible and incompressible flows involving boundaries. Simulations of shock wave reflection in a one-dimensional shock tube have been made. Different boundary methods have been compared with regards to their ability to model a one-dimensional reflecting shock wave. The simulations show that the introduction of imaginary particles appears to be the most effective method of boundary simulation for transient shock reflection. Simulations also show that the choice of artificial diffusion treatment for best reflection is ambiguous. Incompressible flow has been modelled using several test problems. To model incompressible flow, modifications to the standard SPH equations are necessary. An artificial compressibility technique is introduced through a fluid specific equation of state. Real viscosity has been introduced. Results are shown for three test cases: Couette flow, Stoke's first problem, and a shear driven cavity.

Descriptors :   *SHOCK WAVES, *COMPUTATIONAL FLUID DYNAMICS, SHEAR PROPERTIES, SIMULATION, TRANSIENTS, MODIFICATION, ONE DIMENSIONAL, THESES, CAVITIES, REFLECTION, BOUNDARIES, PARTICLES, DIFFUSION, HYDRODYNAMICS, INCOMPRESSIBLE FLOW, FLUID FLOW, COMPRESSIVE PROPERTIES, SHOCK TUBES, COUETTE FLOW.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE