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Title: A new field solver for modeling of relativistic particle-laser interactions using the particle-in-cell algorithm
Authors:
; ; ; ; ; ; ;
Award ID(s):
1806046
Publication Date:
NSF-PAR ID:
10297438
Journal Name:
Computer Physics Communications
Volume:
258
Issue:
C
Page Range or eLocation-ID:
107580
ISSN:
0010-4655
Sponsoring Org:
National Science Foundation
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  1. Particle pair statistics of inertial particles having average Stokes numbers of 2.1 and 14 are measured in isotropic turbulence at a Reynolds number of Reλ = 240. The radial distribution function (RDF) and mean relative approach velocity are obtained at small separation distances using 2-frame stereoscopic particle tracking velocimetry (stereo-PTV). At small separation distance, the RDF varies by an order of magnitude in the range of Stokes numbers investigated. However, the mean relative approach velocity is found to have a weak dependence on Stokes number. The results are shown to have high accuracy when compared to analogous mono-PTV datasets, and can be used to provide a more reliable estimate of the inter-particle collision rate. The main limitation of the measurement is observed at separation distances less than the laser sheet thickness, where the technique tended to underestimate the mean relative approach velocity.