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Volume 47, Issue 10
Displaying 1-8 of 8 articles from this issue
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Part 2 : Model Analysis of Radiative Heat Transfer and Comparison with Experimental ResultsTakako Fujimoto1994 Volume 47 Issue 10 Pages T239-T249
Published: October 25, 1994
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSIn the present paper, we studied the role of radiant heat transfer through fiber battings. By applying the two flux model, the equation of radiant heat transfer can be solved, with taking account of the conductive heat transfer. This model is formulated as general as possible, considering all aspects of radiative processes in fibrous assembly. Based on that, a simple formula is derived which describes the heat transfer rate by radiation as a function of the optical thickness, the ratio of the scattering to the absorption coefficients, the emissivities of boundary plates and the heat conductivity. It demonstrates that the absorption and the scattering have almost the same effects when the boundary plates are black body, while their difference in the radiant heat transfer becomes apparent when the plate emissivities are small. It also predicts that the boundary emissivity plays a crucial role in the battings whose optical thickness is smaller than unity, and under such circumstances, the heat transfer by radiation and by conduction strongly affects each other through deviating the temperature distribution from the linearity. Our purpose is to calculate the heat transfer rate by radiation from the property of fibers. The results are compared with experimental values of the effective thermal conductivity for several polyester assemblies. The model exhibits a fairly good agreement with experimental results.View full abstractDownload PDF (1651K) -
Masayuki Takatera, Akira Shinohara1994 Volume 47 Issue 10 Pages T250-T258
Published: October 25, 1994
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSA unified aspect is presented to analyze the interrelation among the conventional tests of the bending rigidity of textile fabrics, such as the cantilever, Clark, heart-loop methods, etc., which enables it to compare and estimate the errors and applicable ranges of these methods. A staple of fabric is simulated by an elastic strip that has the same rigidity, density, and geometry, and its bending behavior is numerically solved as the problem of an elastica deformed under gravity. For each test method, the results obtained are expressed as the relationships between the related geometric parameters observed by experiment and a dimensionless parameter that is defined as the ratio of the staple length to the bending length. For practical convenience, the third order polynomial approximation is also given for each of these relations. The bending behavior thus predicted coincides well with theexperimental one for many sample fabrics in every traditional method.View full abstractDownload PDF (921K) -
Sumiko Kawabata, Yasuharu Fujiwara1994 Volume 47 Issue 10 Pages T259-T265
Published: October 25, 1994
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSThis study examined female college students' perception of appropriate colors to selected dress styles. The subjects were provided with six drawings of dress styles and color cards (11 hues for 5 tones and 5 neutral colors), and were asked to choose two colors they perceived appropriate for each dess style and two ones inappropriate. The images of each stimulus drawing, the most or the least appropriate colors were also rated on a semantic differential scale.
Frequency distributions of colors selected for each dress style were computed and those of the colors which were grouped into hue or tone categories were also performed. Chi-square analysis of the data indicated there was a significant difference in distributions of the appropiate or the inappropriate hue or tone.
Analysis for the relationship between perceived appropriateness of colors and style-image/color-image congruity showed that the image of the most appropriate colors was more congruent with dress style image than that of the least appropriate colors for each of six dress styles.View full abstractDownload PDF (838K) -
Y. Kobayashi, T. Fujimoto1994 Volume 47 Issue 10 Pages P412-P421
Published: October 25, 1994
Released on J-STAGE: October 27, 2009
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L. Wende, X. Zhi, F. Narita1994 Volume 47 Issue 10 Pages P422-P426
Published: October 25, 1994
Released on J-STAGE: October 27, 2009
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S. Ito1994 Volume 47 Issue 10 Pages P427-P434
Published: October 25, 1994
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (2007K) -
H. Iwasaki1994 Volume 47 Issue 10 Pages P435-P439
Published: October 25, 1994
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (1636K) -
(Part3) 1957-PresentKenji Kamide1994 Volume 47 Issue 10 Pages P440-P449
Published: October 25, 1994
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (2263K)
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