High velocity infrared thermography and numerical trajectories of solid particles in compressible gas flow

Download

index.pdf

Date

2019-02-01

Author

Lappa, M.
Esposito, A.
Aponte, F.
Allouis, Christophe Gerard

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

116
views

62
downloads

The use of High Velocity Infrared Thermography as a valuable alternative to other existing techniques for the visualization and tracking of solid particles transported by a gas jet has been assessed by considering different situations in terms of problem characteristic numbers (jet Reynolds and Mach numbers and Particle Stokes and gravitational Froude numbers). Particles paths have also been calculated by means of a hybrid Eulerian-Lagrangian technique under the intent to cross-validate the two (experimental and numerical) approaches. The results indicate that such a strategy is robust and sufficiently flexible to be used in relatively wide regions of the space of parameters. Experiments have clearly demonstrated that thermography can properly capture particle dynamics with a level of detail comparable to that provided by simulations. Computations have proved to be valuable on their own by allowing the explorations of regions of the parameters space otherwise out of reach. Different tests have been conducted considering both isolated particles and "swarms". We show that the observed dynamics are induced by the delicate interplay of different effects, including inertial, gravitational and eventually "lift" contributions produced by a non-perfect horizontal orientation of the jet or other uncertainties (such as those due to a non mono-sized set of particles). (C) 2018 Elsevier B.V. All rights reserved.

URI

https://hdl.handle.net/11511/89854

Journal

POWDER TECHNOLOGY

DOI

https://doi.org/10.1016/j.powtec.2018.11.059

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

High gradient plasma waves to accelerate charged particles Yedierler, Burak; Bilikmen, Kadri Sinan; Department of Physics (2002) In this thesis one of the most promising plasma based particle acceleration methods, the Laser Wakefield Acceleration (LWFA) mechanism is discussed in detail. Starting from the standard LWFA method, the wakefield generation in plasmas and the energy gain of electrons are formulated. The wakefield generation by a multi passage laser beam in a plasma model based on the resonant LWFA is proposed. The growth of the wakefield amplitude is demonstrated and the corresponding energy gain of electrons is calculated....
High-voltage space tether for enhanced particle scattering in Van Allen belts Danilov, VV; Mirnov, VV; Ucer, D (1999-01-01) New applications of space tethers (High-Voltage Tethered Satellite System project) are discussed in relation with ideal of an active experiment in the Earth's radiation belts. Two conducting strings are supposed to be tethered between the main satellite and two small subsatellites flying through the ERB. A large potential difference similar to 1MV is applied between the tethers by means of a generator carried on the main satellite. The tethers effectively scatter the high energy particles into loss cone of ...
High responsivity InP-InGaAs quantum-well infrared photodetectors: Characteristics and focal plane array performance Cellek, OO; Ozer, S; Beşikci, Cengiz (Institute of Electrical and Electronics Engineers (IEEE), 2005-07-01) We report the detailed characteristics of long-wavelength infrared InP-In0.53Ga0.47As quantum-well infrared photodetectors (QWIPs) and 640 x 512 focal plane array (FPA) grown by molecular beam epitaxy. For reliable assessment of the detector performance, characterization was performed on test detectors of the same size and structure with the FPA pixels. Al0.27Ga0.73As-GaAs QWIPs with similar spectral response (lambda(p) = similar to 7.8 mu m) were also fabricated and characterized for comparison. InP-InGaAs...
High speed automatic scanning systems for emulsion analysis in the opera experiment Altınok, Özgür; Güler, Ali Murat; Department of Physics (2011) The aim of the OPERA experiment is to verify the neutrino oscillation, directly measuring the appearance of from an initially pure beam produced at CERN. For this purpose OPERA detector is located underground Gran Sasso Laboratory(LNGS) 730 km away from CERN. The detector structure designed to be a hybrid system consisting of emulsion targets and electronic detectors. Total area of the emulsion targets in the OPERA detector is around 110000 m2 which needs fast and reliable automatic scanning systems. For th...
Fast Neutron Imaging with Semiconductor Nanocrystal Scintillators McCall, Kyle M.; Sakhatskyi, Kostiantyn; Lehmann, Eberhard; Walfort, Bernhard; Losko, Adrian S.; Montanarella, Federico; Bodnarchuk, Maryna; Krieg, Franziska; Keleştemur, Yusuf; Mannes, David; Shynkarenko, Yevhen; Yakunin, Sergii; Kovalenko, Maksym (2020-11-01) Fast neutrons offer high penetration capabilities for both light and dense materials due to their comparatively low interaction cross sections, making them ideal for the imaging of large-scale objects such as large fossils or as-built plane turbines, for which X-rays or thermal neutrons do not provide sufficient penetration. However, inefficient fast neutron detection limits widespread application of this technique. Traditional phosphors such as ZnS:Cu embedded in plastics are utilized as scintillators in r...

Citation Formats

M. Lappa, A. Esposito, F. Aponte, and C. G. Allouis, “High velocity infrared thermography and numerical trajectories of solid particles in compressible gas flow,” POWDER TECHNOLOGY, pp. 671–682, 2019, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/89854.