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The Effects of Electric Double Layer on Freezing and dehydration in Fine Packed Beds with Liquid Content

Research Project

Project/Area Number 17560177
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionNagaoka University of Technology

Principal Investigator

AOKI Kazuo  Nagaoka University of Technology, Department of Mechanical Engineering, Professor (60115095)

Co-Investigator(Kenkyū-buntansha) AKAHORI Masatoshi  Nagaoka University of Technology, Department of Mechanical Engineering, Assistant (10303182)
Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2006: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2005: ¥1,900,000 (Direct Cost: ¥1,900,000)
KeywordsElectric double layer force / Fine particles / Surface electric charge / Electro-osmosis / Electromagnetic field / Freezing / Dehydration / Colloid / 電気泳動 / 誘電泳動 / 乾燥 / 電場付与
Research Abstract

We have investigated two different phenomena in heat transfer problems relating to electric double layer ; (1) the trapped and swept phenomenon of foreign particles due to freezing of liquid and (2) the dehydration in fine packed beds using the electro-osmotic flow.
(1) When water solution involving fine particles freeze, the freezing process can be divided into two cases whether particles are trapped in the freezing layer or particles are swept out from the freezing layer. The trapped and swept phenomenon of particles due to freezing is widely an important problem related to the freezing process of sludge, the concentration technology and the solidification of metal including foreign particles. We have investigated this phenomenon due to freezing for two cases of independent particles and large number of particles existing in water solution. The trapped and swept phenomenon largely depends on the freezing rate, the size of particle and the surface electric charge of particle. Especially, we focused on the effect of the surface electric charge of particle, on this phenomenon using various particles and water solutions. The calculated results for the critical freezing rate were in agreement with the experimental results using various particles.
(2) In packed bed composed of fine particles, an electro-osmotic flow is caused by the addition of external electric fields for the effect of the electric double layer formed near the surface of particles. This phenomenon is an important problem related to the dehydration of contaminated sludge, the electro-osmotic pump in microchannel and the drying in packed beds. The electro-osmotic flow in saturated packed bed has been investigated experimentally. It was found that the flow rate depended on the surface charge of particles, the structure of packed bed and the electrical conductivity. The dehydration of the packed bed using the electro-osmotic flow has been investigated experimentally.

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • Research Products

    (10 results)

All 2007 2006 2005

All Journal Article (4 results) Presentation (6 results)

  • [Journal Article] 水溶液の凝固による微粒子の補足・掃き出し現象2007

    • Author(s)
      青木和夫, 赤堀匡俊, 鷲奈央也
    • Journal Title

      第44回日本伝熱シンポジウム講演論文集

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 電気浸透現象を利用した含水粒子充填層の脱水2007

    • Author(s)
      赤堀匡俊, 青木和夫, 小濱孝夫
    • Journal Title

      第44回日本伝熱シンポジウム講演論文集

    • Related Report
      2006 Annual Research Report
  • [Journal Article] コロイド液体中の粒子に及ぼす周波数の影響2006

    • Author(s)
      青木和夫, 赤堀匡俊, 安保一生
    • Journal Title

      第43回日本伝熱シンポジウム講演論文集 (発表予定)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 粒子群を含む液体の凝固2005

    • Author(s)
      青木和夫, 赤堀匡俊, 前田貴徳
    • Journal Title

      日本機械学会熱工学コンファレンス講演論文集

      Pages: 405-406

    • Related Report
      2005 Annual Research Report
  • [Presentation] 水溶液の凝固による微粒子の捕捉・掃き出し現象2007

    • Author(s)
      青木和夫・赤堀匡俊・鷲奈央也
    • Organizer
      第44回日本伝熱シンポジウム講演論文集
    • Place of Presentation
      長崎市
    • Year and Date
      2007-05-22
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] 電気浸透現象を利用した含水粒子充填層の脱水2007

    • Author(s)
      赤堀匡俊・青木和夫・小濱孝夫
    • Organizer
      第44回日本伝熱シンポジウム講演論文集
    • Place of Presentation
      長崎市
    • Year and Date
      2007-05-22
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] Trapped and Swept Phenomenon of Small Particle due to Freezing of Various Solutions2007

    • Author(s)
      K.Aoki, M.Akahori, N.Washi
    • Organizer
      The 44th National Heat Transfer Symposium
    • Place of Presentation
      Nagasaki
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] Dehydration of Packed Bed Using Electro-osmotic Phenomenon2007

    • Author(s)
      M.Akahori, K.Aoki, T.Kohama
    • Organizer
      The 44th National Heat Transfer Symposium
    • Place of Presentation
      Nagasaki
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] コロイド液体中の粒子に及ぼす周波数の影響2006

    • Author(s)
      青木和夫・赤堀匡俊・安保一生
    • Organizer
      第43回日本伝熱シンポジウム講演論文集
    • Place of Presentation
      名古屋市
    • Year and Date
      2006-06-02
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Presentation] The Effect of Frequency on Particles in Colloidal Suspension2006

    • Author(s)
      K.Aoki, M.Akahori, I.Ambo
    • Organizer
      The 43rd National Heat Transfer Symposium
    • Place of Presentation
      Nagoya
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary

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Published: 2005-04-01   Modified: 2016-04-21  

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