多数の円孔急縮小部を有する流路における高分子溶液の流れ Entry Flow of Polymer Solutions through Multi-Hole Abrupt Contractions

この論文にアクセスする

この論文をさがす

著者

抄録

Flow visualizations and velocity measurements for entry flows of shear-thinning aqueous solutions of polyacrylamide through three kinds of multi-hole contractions have been carried out using the tracer method and LDV technique. In these experiments effects of the number of contractions, distance between contractions and rheology of solutions on the flow structures have been studied. For the multi-hole contractions square arrays of 9 holes and 25 holes were used. In the steady flow regime dimensionless lip vortex length is almost the same for all multi-hole contractions. Swirling-like vortices are also observed for both three-by-three and five-by-five contractions with dimensionless pitch 4, while two-dimensional lip vortices are observed for the three-by-three contraction with dimensionless pitch 8. It is found from LDV measurements that periodic oscillations of the main flow occur at the onset of unsteady flow for all multi-hole contractions and the frequency of the oscillation increases as the Weissenberg number increases. For multi-hole contractions, flow interaction through each contraction is very important factor which decides both steady and unsteady flow structures.

収録刊行物

  • 日本レオロジー学会誌  

    日本レオロジー学会誌 27(1), 15-23, 1999-03 

    The Society of Rheology, Japan

参考文献:  21件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10002771722
  • NII書誌ID(NCID)
    AN00198812
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03871533
  • NDL 記事登録ID
    4681010
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z14-725
  • データ提供元
    CJP書誌  NDL  J-STAGE 
ページトップへ