Modelling of turbulent gas-particle flows with focus on two-way coupling effects on turbophoresis
2012 (English)In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 224, 36-45 p.Article in journal (Refereed) Published
An Eulerian model was developed for turbulent gas-particle flow that takes into account the influence of particles on the gas-phase turbulence. For the description of the particle-phase stress the kinetic theory of granular flow and the simpler Hinze model were adopted. A K-ω model was used as the gas phase turbulence model. The difference between one- and two-way coupling was investigated for different particle volume fractions and particle diameters. It was found that particles with a much higher density than the fluid substantially affect the gas-phase in turbulent channel flow for particle volume fractions as low as 10 -4. The models with the particle-phase stress described by the kinetic theory of granular flow and the simpler Hinze model produce similar results for particles with small response times but deviate for larger response times. The study shows that two-way coupling and the turbophoretic effect must be taken into account in models even at relatively low particle volume fractions.
Place, publisher, year, edition, pages
2012. Vol. 224, 36-45 p.
Concentration profiles, Fluid mechanics and transport phenomena, Modelling, Turbophoresis, Turbulent gas-particle flows, Two-way coupling
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-7988DOI: 10.1016/j.powtec.2012.02.017ISI: 000304792000005ScopusID: 2-s2.0-84860504866OAI: oai:DiVA.org:kth-7988DiVA: diva2:13188
FunderSwedish e‐Science Research Center
QS 20120529. Updated from submitted to published.2008-02-202008-02-202013-04-08Bibliographically approved