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

Title: A new method to calculate unsteady particle kinematics and drag coefficient in a subsonic post-shock flow

Journal Article · · Measurement Science and Technology

In this paper, we introduce a new method (piecewise integrated dynamics equation fit, PIDEF) that uses the particle dynamics equation to determine unsteady kinematics and drag coefficient (C D) for a particle in subsonic post-shock flow. The uncertainty of this method is assessed based on simulated trajectories for both quasi-steady and unsteady flow conditions. Traditional piecewise polynomial fitting (PPF) shows high sensitivity to measurement error and the function used to describe C D, creating high levels of relative error (>>1) when applied to unsteady shock-accelerated flows. The PIDEF method provides reduced uncertainty in calculations of unsteady acceleration and drag coefficient for both quasi-steady and unsteady flows. This makes PIDEF a preferable method over PPF for complex flows where the temporal response of C D is unknown. Finally, we apply PIDEF to experimental measurements of particle trajectories from 8-pulse particle tracking and determine the effect of incident Mach number on relaxation kinematics and drag coefficient of micron-sized particles.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1440444
Report Number(s):
LA-UR-17-31279
Journal Information:
Measurement Science and Technology, Vol. 29, Issue 7; ISSN 0957-0233
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

References (30)

Experiments and Analyses on Shock Waves Propagating through a Gas-Particle Mixture journal January 1976
Application of PIV in a Mach 7 double-ramp flow journal April 2006
Particle tracer response across shocks measured by PIV journal May 2010
Motion of tracer particles in supersonic flows journal March 1999
Dust suspensions accelerated by shock waves journal April 2000
Some Properties of Shock Relaxation in Gas Flows Carrying Small Particles journal January 1964
Experimental investigation on interactions among fluid and rod-like particles in a turbulent pipe jet by means of particle image velocimetry journal December 2014
Lamination and folding in electromagnetically driven flows of specified geometries journal January 2011
Particle Image Velocimetry in Mach 3.5 and 4.5 Shock-Tunnel Flows journal June 2002
A new experiment to measure shocked particle drag using multi-pulse particle image velocimetry and particle tracking journal November 2014
Experimental Lagrangian acceleration probability density function measurement journal June 2004
Morphological method for surface metrology and dimensional metrology based on the alpha shape journal December 2011
N -pulse particle image velocimetry-accelerometry for unsteady flow-structure interaction journal November 2016
Correction Method for Particle Velocimetry Data Based on the Stokes Drag Law journal November 2007
Planar velocity measurements in compressible mixing layers journal March 2001
Measurement of instantaneous Eulerian acceleration fields by particle image accelerometry: method and accuracy journal December 2002
Shock Tube Study of the Drag Coefficient of a Sphere in a Non-Stationary Flow journal August 1993
Relaxation drag history of shock accelerated microparticles journal June 2017
Particle tracking velocimetry and accelerometry (PTVA) measurements applied to quasi-two-dimensional multi-scale flows journal January 2008
Planar velocity measurements of a two-dimensional compressible wake journal February 2003
Effective Drag Coefficient for Gas-Particle Flow in Shock Tubes journal March 1970
Shock propagation through a perfect gas entrained with a normal distribution of fine particles journal December 1990
3D PTV and its application on Lagrangian motion journal December 1997
Fluid particle accelerations in fully developed turbulence journal February 2001
Lagrangian measurement of vorticity dynamics in turbulent flow journal January 1999
The unsteadiness of shock waves propagating through gas-particle mixtures journal July 1985
Measurement of particle accelerations in fully developed turbulence journal October 2002
Particle image velocimetry in Mach 3.5 and 4.5 shock-tunnel flows journal January 2002
Measurement of Particle Accelerations in Fully Developed Turbulence text January 2001
Experimental Lagrangian Acceleration Probability Density Function Measurement text January 2003

Cited By (1)

12th International Symposium on Particle Image Velocimetry (PIV 2017) journal January 2019