- Title
- The apparent viscocity of aerated alumina powder using a sphere drop technique
- Creator
- Williams, K. C.; Seswai, G.; Jones, M. G.
- Relation
- International Symposium Reliable Flow of Particulate Solids IV (RELPOWFLO IV). Proceedings of the International Symposium Reliable Flow of Particulate Solids IV (Tromso, Norway 10-12 June, 2008) p. 267-272
- Relation
- http://www.relpowflo.no
- Publisher
- Telemark University College
- Resource Type
- conference paper
- Date
- 2008
- Description
- With the increase in the development of CFD based codes for gas-solids flows, the viscous nature of gas-solid behaviour is becoming an increasing important parameter to detennine. Generally, the assumption on the viscous behaviour of gas-solid flows is that the viscosity is only related to the interstitial gases rate of deformation rather than the overall gas-solids deformation response. This deformation response can vary from the conveying gas viscosity response for dilute gas-solid systems to apparent gas-solid viscosity behaviour for material that exhibits high air retention. (e.g. fluidised material). The apparent viscosity calculations for an alumina powder were based on the resistance force of a sphere passing vertically through the aerated alumina bed. Initial results of the drag force of the sphere found that its associated co-efficient of drag within the aerated bed could vary between 1.2 and 2.5 with the aerated alumina bed exhibiting shear thinning (pseudo-plastic)viscosity behaviour.
- Subject
- powders; alumina powder; viscosity
- Identifier
- uon:5900
- Identifier
- http://hdl.handle.net/1959.13/44872
- Identifier
- ISBN:9788272062896
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