凝集性のコロイド粒子懸濁液の流動特性

• 足立 泰久

  筑波大学 生命環境科学研究科

• 小林 幹佳

  岩手大学 農学部

• 深澤 智典

  筑波大学 生命環境科学研究科

• Scalesc Peter J.

  メルボルン大学 生物化学工学科 粒子流体プロセスセンター

書誌事項

タイトル別名

• Rheological Properties of Flocculated Colloidal Suspension
• ギョウシュウセイ ノ コロイド リュウシ ケンダクエキ ノ リュウドウ トクセイ

抄録

The viscosity and yield stress of flocculated suspensions were reviewed in terms of fractal structure and strength of flocs. The fractal structure is formed by the sequential collision process of clusters. However, the cluster rearrangement process is important with the number of contacts between clusters. Floc strength is determined by the product of cohesive force per contact and the number of contacts between clusters. This simple expression will determine the size of flocs at given shear rate, thus determining effective volume of flocs. Shear thinning behavior is expressed by putting this value into Mori-Ototake viscosity equation. The asymptotic behavior of shear stress at zero shear limit is interpreted as yield stress. The obtained yield stress is expressed as a function of volume fraction of colloid. The functional form is different from that obtained for the flocculated sediment with vane in rather concentrated region. Importance for further analyses on the loose, soft and unstable sediment with large deformable flocs is implied.

収録刊行物

• 粉体工学会誌

  粉体工学会誌 47 (4), 230-239, 2010

  一般社団法人 粉体工学会

キーワード

• Floc
• Fractal
• Strength
• Viscosity
• Yield stress
• Effective volume

詳細情報

• CRID: 1390001204512632320
• NII論文ID: 10026354278
• NII書誌ID: AN00222757
• DOI: 10.4164/sptj.47.230
• ISSN: 18837239
• ISSN: 03866157
• NDL書誌ID: 10669547
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10669547
• Web Site: https://www.jstage.jst.go.jp/article/sptj/47/4/47_230/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可