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Numerical study of turbulent channel flow laden with finite-size non-spherical particles
KTH, Skolan för teknikvetenskap (SCI), Mekanik. KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW. KTH, Centra, SeRC - Swedish e-Science Research Centre.ORCID-id: 0000-0002-4346-4732
KTH, Skolan för teknikvetenskap (SCI), Mekanik. KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW. KTH, Centra, SeRC - Swedish e-Science Research Centre.
Vise andre og tillknytning
2017 (engelsk)Inngår i: 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017, International Symposium on Turbulence and Shear Flow Phenomena, TSFP10 , 2017, Vol. 4Konferansepaper (Fagfellevurdert)
Abstract [en]

We present interface-resolved numerical simulations of turbulent channel flow laden with non-spherical rigid and neutrally-buoyant particles. We first focus on the case of oblate particles of aspect ratio 1/3 at volume fractions up to 15% and show that the turbulent drag is decreasing when increasing the particle volume fraction although the effective viscosity of the suspension actually increases. We relate the observed drag reduction to turbulence attenuation and to particle migration away from the near-wall region. Particles tend to align parallel to the wall with rotation rates significantly lower than those reported for spheres. In the second part of the study, we examine the effect of the particle slenderness on the observed drag reduction and show that the drag increases for flatter particles.

sted, utgiver, år, opplag, sider
International Symposium on Turbulence and Shear Flow Phenomena, TSFP10 , 2017. Vol. 4
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-217854Scopus ID: 2-s2.0-85033375570ISBN: 9780000000002 (tryckt)OAI: oai:DiVA.org:kth-217854DiVA, id: diva2:1158071
Konferanse
10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017, Swissotel Chicago, United States, 6 July 2017 through 9 July 2017
Forskningsfinansiär
Swedish e‐Science Research Center
Merknad

QC 20171117

Tilgjengelig fra: 2017-11-17 Laget: 2017-11-17 Sist oppdatert: 2017-11-17bibliografisk kontrollert

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