Viscoelastic Flow in Two Cycle Converging-Diverging Channel ; Experimental Study for Pressure Characteristics and Flow State Classification

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Pressure characteristics were studied experimentally for a two cycle converging-diverging channel (a type of corrugated tube), using polyacrylamide water solutions as working fluids. Effects of the viscoelasticity on the pressure distribution along the channel wall were examined by comparing the data for polymer solutions with a Newtonian fluid. The experimental results for the two cycle channel were also compared with the data for one cycle channel having the same dimension. The total pressure drop for the two cycle channel with a dilute polymer solution was smaller than that of the Newtonian fluid in a region of lower Reynolds number, whereas no such a symptom was observed in the case of the one cycle channel. <BR>From the observation by a flow visualization technique in the laminar flow regime, there were found to exist five and four major flow modes in the converging and diverging parts of the channels, respectively, and hence there appeared, in total, thirteen flow states in the channels. Based on the flow modes, flow state maps are presented in the present study.

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  • 日本レオロジー学会誌  

    日本レオロジー学会誌 25(2), 89-98, 1997-06-15 

    一般社団法人 日本レオロジー学会

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各種コード

  • NII論文ID(NAID)
    10002770623
  • NII書誌ID(NCID)
    AN00198812
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    03871533
  • NDL 記事登録ID
    4235961
  • 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 
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