Numerical studies of shock wave structure sensitivity to interactions with turbulent fields

Conference · Sat Apr 01 04:00:00 EST 1989

OSTI ID:6130925

Buckingham, A. C.

This paper concerns the observed random changes to velocity, density, temperature, and pressure distributions induced in shock waves when weak shocks interact with relatively intense turbulence. Here numerical procedures are applied in order to examine this interaction process and to simulate its influence on turbulence. This interaction may be used as a diagnostic for ascertaining the distribution of interaction energy between competitive acoustic, entropy and vortical modes. Numerical procedures used here are supplements to physical experiments for tracking the dynamical mechanisms which may control the evolution of shock-turbulence interaction. The results are intended to provide assistance in the development and refinement of compressible turbulent closure models. They are obtained from use of a mixed Eulerian-Lagrangian semicontinuous rezoning finite difference method, a hybrid Euler/Lagrange pseudospectral method, and a Monte-Carlo random-choice procedure. The latter effectively magnifies the shock front region through use of finite range shock-transition integrals generating simulated interactive transition profiles. 11 refs., 6 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6130925
• Report Number(s): UCRL-100203; CONF-890752-3; ON: DE89012288
• Country of Publication: United States
• Language: English

Related Subjects

640410* -- Fluid Physics-- General Fluid Dynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPUTERIZED SIMULATION
DIFFERENTIAL EQUATIONS
EQUATIONS
FLUID FLOW
MATHEMATICS
MONTE CARLO METHOD
NAVIER-STOKES EQUATIONS
NUMERICAL ANALYSIS
PARTIAL DIFFERENTIAL EQUATIONS
SHOCK WAVES
SIMULATION
TURBULENT FLOW
VISCOUS FLOW