Journal of the Society of Powder Technology, Japan
Online ISSN : 1883-7239
Print ISSN : 0386-6157
ISSN-L : 0386-6157
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Volume 23, Issue 7
Displaying 1-7 of 7 articles from this issue
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  • The Effect of a Flat Plate Held Normal to the Wall on Solid Particle Motion
    Hiroyuki UENO, Yuuki KANO
    1986 Volume 23 Issue 7 Pages 487-492
    Published: July 10, 1986
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.23.487
    JOURNAL FREE ACCESS
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    This report is the concerned with an method for the approximate calculation of the path of a solid particle which impacts an obstacle, such as an inertial dust collector, or a Pitot tube which is installed on the wall.
    This obstacle is represented by a flat plate. A discrete-vortex method is used to simulate the flow around the flat plate.
    It is important for approximate calculation to estimate the flow near the flat plate. The path of the solid particle is calculated near the wall, and is approximated from the path which is estimated from the potential flow.
    Time-dependent flow which can be observied near the re-attachment point varies very little from the path of the solid particle.
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  • The Effect of the Wake Behind a Flat Plate Normal to the Flow of Solid Particle Motion (for Kàrmàn vortex)
    Hiroyuki UENO, Yuuki KANO
    1986 Volume 23 Issue 7 Pages 493-499
    Published: July 10, 1986
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.23.493
    JOURNAL FREE ACCESS
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    The flow around an obstacle, such as the fiber of a filter, or an inertial dust collector, shows intense unsteadiness, and a Kàrmàn vortex street appears behind the obstacle.
    This Kàrmàn vortex street produces unsteady transverse displacement of the solid particle moving in the upstream flow of the obstacle.
    In this report, the obstacle is represented by a flat plate. On the average, transverse displacement of the solid particle is 2.0 times as large as the one moving in the potential flow. The amplitude of unsteady transverse displacement is equal to the one moving in the potential flow.
    A change in unsteady transverse displacement mainly depends upon when the solid particle is introduced.
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  • The Effect of an Ultra-Fine Solid Additive on the Tensile Strength of a Powder Bed
    Makio NAITO, Naoki KATO, Genji JIMBO, Tohei YOKOYAMA
    1986 Volume 23 Issue 7 Pages 500-506
    Published: July 10, 1986
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.23.500
    JOURNAL FREE ACCESS
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    Solid additives are widely used to control the mechanical properties of powder materials in many industries, but the mechanics of these additives have not yet been elucidated. In this paper, the measurement of the tensile strength of a powder bed with a split-cell type tester was conducted to elucidate the effect of solid additives on the mechanical properties of powder materials.
    Fused alumina powder, silica sand and limestone were selected as powder materials, and finely divided anhydrous silica was used as a solid additive.
    The tensile strength of a powder bed containing the solid additive was related to the porosity of powder bed and the pre-compressive stress in respective experimental equations with a parameter of additive content.
    Furthermore, the effect of the solid additive on the relationship between the tensile strength and porosity was discussed to elucidate its microscopic characteristics.
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  • [title in Japanese]
    Akihiro GOTOH, Mitsutaka KAWAMURA
    1986 Volume 23 Issue 7 Pages 507-509
    Published: July 10, 1986
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.23.507
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Zenjiro ASAKI
    1986 Volume 23 Issue 7 Pages 510-517
    Published: July 10, 1986
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.23.510
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Takafumi ISHIZAKA
    1986 Volume 23 Issue 7 Pages 530-533
    Published: July 10, 1986
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.23.530
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1986 Volume 23 Issue 7 Pages 534-540
    Published: July 10, 1986
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.23.534
    JOURNAL FREE ACCESS
    Download PDF (2270K)
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