Go to page
 

Bibliographic Metadata

Title
Validation study on spatially averaged twofluid model for gassolid flows : I. A priori analysis of wall bounded flows
AuthorSchneiderbauer, Simon
Published in
AIChE Journal, 2018, Vol. 64, Issue 5, page 1591-1605
PublishedWiley, 2018
LanguageEnglish
Document typeJournal Article
ISSN1547-5905
URNurn:nbn:at:at-ubl:3-562 Persistent Identifier (URN)
DOI10.1002/aic.16142 
Restriction-Information
 The work is publicly available
Files
Validation study on spatially averaged twofluid model for gassolid flows [1.15 mb]
Links
Reference
Classification
Abstract (English)

In our prior study (Schneiderbauer, AIChE J, 2017;63(8):35443562), we presented a spatially averaged twofluid model, where closure models for the unresolved terms were derived. These closures require constitutive relations for the turbulent kinetic energies (TKEs) of the gas and solids phase as well as for the subfilter variance of the solids volume fraction (VVF). In this study, we have performed highly resolved TFM simulations of a set of threedimensional wall dominated periodic channels. An a priori analysis shows that these closures are able to correctly predict the wall profiles of the subgrid drag modification, the TKEs, the turbulent viscosities and the VVF without requiring special wall corrections. Solely the mixing lengths, which is required by the closures, has to be adapted in the vicinity of wall similar to singlephase turbulence; in particular, the minimum of the filter size and the distance to the wall should be used.

Stats
The PDF-Document has been downloaded 2 times.
License
CC-BY-NC-License (4.0)Creative Commons Attribution - NonCommercial 4.0 International License