skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Wavelet analysis methods for radiography of multidimensional growth of planar mixing layers

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.4955097· OSTI ID:1291222
 [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The counter-propagating shear campaign is examining instability growth and its transition to turbulence in the high-energy-density physics regime using a laser-driven counter-propagating flow platform. In these experiments, we observe consistent complex break-up of and structure growth in a tracer layer placed at the shear flow interface during the instability growth phase. We present a wavelet-transform based analysis technique capable of characterizing the scale- and directionality-resolved average intensity perturbations in static radiographs of the experiment. This technique uses the complete spatial information available in each radiograph to describe the structure evolution. We designed this analysis technique to generate a two-dimensional power spectrum for each radiograph from which we can recover information about structure widths, amplitudes, and orientations. Lastly, the evolution of the distribution of power in the spectra for an experimental series is a potential metric for quantifying the structure size evolution as well as a system’s evolution towards isotropy.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1291222
Alternate ID(s):
OSTI ID: 1260429
Report Number(s):
LA-UR-15-28836
Journal Information:
Review of Scientific Instruments, Vol. 87, Issue 7; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

References (29)

Cosmological Applications of a Wavelet Analysis on the Sphere journal May 2007
Wavelet Transforms and their Applications to Turbulence journal January 1992
A Practical Guide to Wavelet Analysis journal January 1998
Developed turbulence and nonlinear amplification of magnetic fields in laboratory and astrophysical plasmas journal June 2015
Methods for Characterising Microphysical Processes in Plasmas journal May 2013
A spanwise structure in the plane shear layer journal July 1983
Multimode seeded Richtmyer–Meshkov mixing in a convergent, compressible, miscible plasma system journal May 2003
The mixing layer at high Reynolds number: large-structure dynamics and entrainment journal December 1976
Two laser-driven mix experiments to study reshock and shear journal September 2013
Initial performance results of the OMEGA laser system journal January 1997
Climate Signal Detection Using Wavelet Transform: How to Make a Time Series Sing journal December 1995
Using Two-dimensional Anisotropic Wavelet Transform for Exploring Anisotropy from Airborne Spectrometric Measurements journal August 2015
A high energy density shock driven Kelvin–Helmholtz shear layer experiment journal May 2009
Instability, mixing, and transition to turbulence in a laser-driven counterflowing shear experiment journal January 2013
Modifying mixing and instability growth through the adjustment of initial conditions in a high-energy-density counter-propagating shear experiment on OMEGA journal June 2015
Ten Lectures on Wavelets book January 1992
Coherent vortex simulation of three-dimensional turbulent mixing layers using orthogonal wavelets journal June 2005
Image analysis with two-dimensional continuous wavelet transform journal April 1993
Structure in turbulent mixing layers and wakes using a chemical reaction journal August 1981
The compressible turbulent shear layer: an experimental study journal December 1988
2D wavelet-based spectra with applications journal January 2011
The eduction of structures from flow imagery using wavelets Part I. The mixing layer journal July 1999
The Shock/Shear platform for planar radiation-hydrodynamics experiments on the National Ignition Facilitya) journal May 2015
Observation of mix in a compressible plasma in a convergent cylindrical geometry journal November 2002
Measurements of turbulent mixing due to Kelvin–Helmholtz instability in high-energy-density plasmas journal March 2013
Two-dimensional wavelet transform feature extraction for porous silicon chemical sensors journal June 2013
Streamwise vortex structure in plane mixing layers journal September 1986
Validation of a Turbulent Kelvin-Helmholtz Shear Layer Model Using a High-Energy-Density OMEGA Laser Experiment journal October 2012
On density effects and large structure in turbulent mixing layers journal July 1974

Cited By (1)

Turbulent mixing and transition criteria of flows induced by hydrodynamic instabilities journal August 2019

Similar Records

Wavelet analysis methods for radiography of multidimensional growth of planar mixing layers
Journal Article · Fri Jul 15 00:00:00 EDT 2016 · Review of Scientific Instruments · OSTI ID:1291222

Demonstration of repeatability in a high-energy-density planar shear mixing layer experiment
Journal Article · Sat Mar 11 00:00:00 EST 2017 · High Energy Density Physics · OSTI ID:1291222

The Center for Momentum Transport and Flow Organization in Plasmas - Final Scientific Report
Technical Report · Mon Dec 14 00:00:00 EST 2015 · OSTI ID:1291222