接触粒子間の接触伝熱に及ぼす表面粗さの影響 Effects of Surface Roughness on Contact Heat Transfer between Contacting Particles

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The objective of this work is to establish a constitution equation of the contact heat transfer between colliding particles for the Discrete Element Method (DEM) simulations. Since the thermal resistance model is available to estimate the contact heat transfer, the heat transfer between two particles (spheres) was measured by changing surface roughness. The result of this is that the contact heat transfer increased as surface roughness increased. This tendency is opposite to a general one in the thermal resistance model. This would be caused by the geometric condition of the spherical contact plane. Larger surface roughness yields larger contact area. This effect would be larger than that of increasing thermal resistance. Moreover, we tried to directly observe the surface under contact condition by using a laser microscope in order to examine the surface conditions in detail. The cross-sectional profile of contacting particles was successfully detected. The macroscopic contact area calculated by considering the surface roughness well agreed with the observed one.

収録刊行物

  • 混相流研究の進展 : 年会講演会論文精選集 = Progress in multiphase flow research

    混相流研究の進展 : 年会講演会論文精選集 = Progress in multiphase flow research (2008), 83-89, 2008-06-15

    THE JAPANESE SOCIETY FOR MULTIPHASE FLOW

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各種コード

  • NII論文ID(NAID)
    10021154390
  • NII書誌ID(NCID)
    AA12204080
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    18815804
  • NDL 記事登録ID
    9553870
  • NDL 雑誌分類
    ZM17(科学技術--科学技術一般--力学・応用力学)
  • NDL 請求記号
    Z74-E929
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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