Manipulating turbulent mixing behavior through particle injection

Giovanni Di Cristina, Shijin P. Kozhumal, Ali Rangwala, Seong Kyun Im

Research output: Contribution to conferencePaperpeer-review


The effects of particle injection on turbulent mixing behaviors of two gas streams were experimentally and computationally investigated. Particularly, the current study focused on the alteration of the mixing length required for the homogeneous gas mixture by the injected particles. Air and carbon dioxide were used for the mixing gases and supplied through the core and annular potions of two coaxially placed pipes with equal cross sectional areas. The mass flow rate was fixed to be equal for both gas streams. The gas streams, along with alumina particles (having a nominal diameter of 12 micro-meters) were allowed to mix at the end of the core pipe. In this work, dust density and Reynolds numbers (mass flow rates) were varied, ranging from 0.12 to 0.3 mg/cm3 and 3500 to 8000, respectively. At fixed dust concentrations, mixing length was shortened for all Reynolds number cases. On the other hand, in a fixed Reynolds number, mixing was enhanced or deteriorated depending on the concentration of injected dust.

Original languageEnglish
Publication statusPublished - 2017
Externally publishedYes
Event10th U.S. National Combustion Meeting - College Park, United States
Duration: 2017 Apr 232017 Apr 26


Conference10th U.S. National Combustion Meeting
Country/TerritoryUnited States
CityCollege Park

Bibliographical note

Publisher Copyright:
© 2017 Eastern States Section of the Combustion Institute. All rights reserved.

ASJC Scopus subject areas

  • General Chemical Engineering
  • Physical and Theoretical Chemistry
  • Mechanical Engineering


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