Journal of the Textile Machinery Society of Japan
Online ISSN : 1881-1159
Print ISSN : 0040-5043
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Volume 32, Issue 1
Displaying 1-3 of 3 articles from this issue
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  • Viscoelastic Flow in Y-Shaped Channel
    Kiyoji Nakamura, Wen Hong Zhao, Taro Nishimura, Akira Horikawa
    1986 Volume 32 Issue 1 Pages 1-6
    Published: 1986
    Released on J-STAGE: October 24, 2006
    DOIhttps://doi.org/10.4188/jte1955.32.1
    JOURNAL FREE ACCESS
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    A two-dimensional steady flow of viscoelastic and Newtonian liquids is investigated in Y-shaped channel. In the present paper a Maxwell model in which the viscosity term is due to Carreau is used for the viscoelastic liquid. It is the purpose of the present work to investigate the effects of elasticity and non-Newtonian viscosity on flow pattern.
    Numerical results agree qualitatively with experimental observations. With viscoelastic liquids a secondary flow appears upstream of the Y-shaped junction on its acute angle side. The region of secondary flow becomes larger with increasing Reynolds and Weissenberg numbers showing effects of elasticity and non-Newtonian viscosity. Whereas in the Newtonian flow no secondary flow appears at these Reynolds numbers, but when the Reynolds number becomes large a secondary flow appears downstream of the Y-shaped junction on its acute angle side.
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  • Pattern Recognition of Fabric Surfaces
    Ken'ichi Ohta, Katsuhiko Sakaue, Hideyuki Tamura
    1986 Volume 32 Issue 1 Pages 7-10
    Published: 1986
    Released on J-STAGE: October 24, 2006
    DOIhttps://doi.org/10.4188/jte1955.32.7
    JOURNAL FREE ACCESS
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    One of the problems in an automatic fabric analysis is how to detect warp and weft yarns in a fabric. This paper proposes a computationally efficient procedure to detect yarns as lines on a digitized fabric surface and to estimate the cross points of yarns.
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  • Modelling of a Dyeing Process and its Energy Consumption Analysis
    Hiroshi Ohno, Fusao Yoshida, Masami Morimoto, Iori Hashimoto, Takeichi ...
    1986 Volume 32 Issue 1 Pages 11-17
    Published: 1986
    Released on J-STAGE: October 24, 2006
    DOIhttps://doi.org/10.4188/jte1955.32.11
    JOURNAL FREE ACCESS
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    The dyeing industry is a typical energy consuming industry in which a very large amount of heat and water is consumed annually. The ratio of energy cost to overall manufacturing cost in 1982, for example, was as high as 18%. The dyeing industry, therefore, is one of the industries which urgently require some effective measures for saving energy. In the dyeing process, energy consumption is greatly influenced not only by the production rate, but also by the temperature of processing water, which is consumed in large volumes, as well as by counter measures for saving energy such as heat recovery. In this study, a mathematical model of dyeing process is derived from the enthalpy balance equation using the observed data. Then, the effect of water temperature and production rate on the basic unit of energy consumption is analysed using the developed mathematical model.
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