Multidimensional Numerical Methods for the Simulation of Shock-Generated Turbulence

Abstract

We discuss shock-generated turbulence as related to the dynamics of hot gaseous channels produced by laser pulses and electric discharges in gaseous atmospheres. Accurate models of channel development must account for compressible flows, which are associated with shocks that are present at early times, as well as the incompressible residual motion which is responsible for channel cooling. We present an efficient numerical technique which uses the flux-corrected transport algorithm and permits automatic adjustment of the time step to account for both types of behavior. Comparisons of two-dimensional calculations to theory and to experimental data on laser channels show good agreement. Our numerical results reveal a mechanism by which the distribution of turbulent scale lengths is generated during energy deposition.

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Document Details

Document Type
Technical Report
Publication Date
Dec 30, 1982
Accession Number
ADA123235

Entities

People

  • J. Michael Picone
  • Jay Paul Boris

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Electric Discharges
  • Equations
  • Experimental Data
  • Flow
  • Flow Fields
  • Fluid Flow
  • Hot Spots
  • Laser Pulses
  • Military Research
  • Pressure Gradients
  • Radial Velocity
  • Residuals
  • Security
  • Shock Waves
  • Simulations
  • Stratified Fluids
  • Turbulence

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Directed Energy