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Моделирование дисперсии частиц при турбулентном течении после внезапного расширения трубы

Моделирование дисперсии частиц при турбулентном течении после внезапного расширения трубы

Abstract

С использованием эйлерова подхода выполнено исследование структуры течения и процесса распространения дисперсной примеси в турбулентном потоке после внезапного расширения трубы в случае небольших значений массовой концентрации частиц ( M L1 = 0-0.1) при вариации в широком диапазоне размера и материала частиц. Изучено влияние частиц на процессы распространения дисперсной фазы, на турбулентность газа и дисперсию твердой фазы. Показано, что малоинерционные частицы вовлекаются в циркуляционное движение и могут накапливаться в ней. Крупные частицы проходят в основном через область сдвигового течения и практически не попадают в отрывную зону. Выполнено сопоставление с данными измерений для случая монодисперсных двухфазных отрывных течений

Gas-droplets turbulent flow and dispersion of particles downstream of a sudden pipe expansion using Euler/Euler model has been investigated for the case of low fraction of the droplet mass (ML1 = 0-0.1). The effect of a dispersed phase on the dispersion of particles and gas turbulence has been studied. The presence of fine dispersed droplets in the flow drastically attenuates the gas phase turbulence. Low-inertia droplets are well entrained into the circulation flow and present over the whole pipe section. Large particles go through the shear layer, practically not getting into the detached area. Comparison with experimental data on separated two-phase flows behind the plane backward-facing step is done.

Keywords

МОДЕЛИРОВАНИЕ, ДИСПЕРСИЯ ЧАСТИЦ, ТЕПЛОПЕРЕНОС, ВЗАИМОДЕЙСТВИЕ КАПЕЛЬ С ТУРБУЛЕНТНОСТЬЮ, ВНЕЗАПНОЕ РАСШИРЕНИЕ ТРУБЫ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze