Modeling of soot particle collision and growth paths in gas-solid two-phase flow
Particle collision is an important process in soot particle growth. In this research, based on gas-solid two-phase flow, particle trajectory was traced by the Lagrange approach with periodic boundaries. Trajectory intersection, collision probability, and critical velocity were considered, and the gr...
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VINCA Institute of Nuclear Sciences
2021-01-01
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doaj-07b90a2dbe4342bfa7f099cb13f718302021-09-24T09:48:23ZengVINCA Institute of Nuclear SciencesThermal Science0354-98362334-71632021-01-01255 Part B3741375210.2298/TSCI191110215J0354-98362000215JModeling of soot particle collision and growth paths in gas-solid two-phase flowJu Hongling0Bian Fanquan1Wei Mingrui2Hubei Key Laboratory of Advanced Technology for Automotive Component, Wuhan University of Technology, Luoshi Road,Wuhan, China + HubeiCollaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan, ChinaHubeiCollaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan, ChinaHubei Key Laboratory of Advanced Technology for Automotive Component, Wuhan University of Technology, Luoshi Road,Wuhan, China + HubeiCollaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan, ChinaParticle collision is an important process in soot particle growth. In this research, based on gas-solid two-phase flow, particle trajectory was traced by the Lagrange approach with periodic boundaries. Trajectory intersection, collision probability, and critical velocity were considered, and the growth path of each particle was traced. The collision frequency, fc, agglomeration frequency, fa, and friction collision frequency, ffc, were calculated, and the main influence factors of particle collision were analyzed. The results showed that fc, fa, fa/fc increased with the increase of the particle volume fraction and gas phase velocity, v, but the particle initial diameter, dpi, and velocity had the great influence on fa/fc. fa/fc obviously decreased with the increase of dpi and v. The statistical analysis of fa/fc and Stokes number showed that fa/fc decreased with the increase of Stokes number, especially when Stokes number was extremely small, fa/fc decreased rapidly. Using the trajectory analysis of each particle, the particle growth process could be classified in three types: firstly, the particles that did not agglomerate with any particles during the entire calculation process, secondly, the particles that continually agglomerated with small particles to generate larger ones, and finally, the particles that were agglomerated by larger particles at some calculation moment.http://www.doiserbia.nb.rs/img/doi/0354-9836/2021/0354-98362000215J.pdfgas-solid flowlagrange approachparticle size distributionagglomerationfriction collisionparticle growth path |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ju Hongling Bian Fanquan Wei Mingrui |
spellingShingle |
Ju Hongling Bian Fanquan Wei Mingrui Modeling of soot particle collision and growth paths in gas-solid two-phase flow Thermal Science gas-solid flow lagrange approach particle size distribution agglomeration friction collision particle growth path |
author_facet |
Ju Hongling Bian Fanquan Wei Mingrui |
author_sort |
Ju Hongling |
title |
Modeling of soot particle collision and growth paths in gas-solid two-phase flow |
title_short |
Modeling of soot particle collision and growth paths in gas-solid two-phase flow |
title_full |
Modeling of soot particle collision and growth paths in gas-solid two-phase flow |
title_fullStr |
Modeling of soot particle collision and growth paths in gas-solid two-phase flow |
title_full_unstemmed |
Modeling of soot particle collision and growth paths in gas-solid two-phase flow |
title_sort |
modeling of soot particle collision and growth paths in gas-solid two-phase flow |
publisher |
VINCA Institute of Nuclear Sciences |
series |
Thermal Science |
issn |
0354-9836 2334-7163 |
publishDate |
2021-01-01 |
description |
Particle collision is an important process in soot particle growth. In this research, based on gas-solid two-phase flow, particle trajectory was traced by the Lagrange approach with periodic boundaries. Trajectory intersection, collision probability, and critical velocity were considered, and the growth path of each particle was traced. The collision frequency, fc, agglomeration frequency, fa, and friction collision frequency, ffc, were calculated, and the main influence factors of particle collision were analyzed. The results showed that fc, fa, fa/fc increased with the increase of the particle volume fraction and gas phase velocity, v, but the particle initial diameter, dpi, and velocity had the great influence on fa/fc. fa/fc obviously decreased with the increase of dpi and v. The statistical analysis of fa/fc and Stokes number showed that fa/fc decreased with the increase of Stokes number, especially when Stokes number was extremely small, fa/fc decreased rapidly. Using the trajectory analysis of each particle, the particle growth process could be classified in three types: firstly, the particles that did not agglomerate with any particles during the entire calculation process, secondly, the particles that continually agglomerated with small particles to generate larger ones, and finally, the particles that were agglomerated by larger particles at some calculation moment. |
topic |
gas-solid flow lagrange approach particle size distribution agglomeration friction collision particle growth path |
url |
http://www.doiserbia.nb.rs/img/doi/0354-9836/2021/0354-98362000215J.pdf |
work_keys_str_mv |
AT juhongling modelingofsootparticlecollisionandgrowthpathsingassolidtwophaseflow AT bianfanquan modelingofsootparticlecollisionandgrowthpathsingassolidtwophaseflow AT weimingrui modelingofsootparticlecollisionandgrowthpathsingassolidtwophaseflow |
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1717369893226020864 |