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Volume 34, Issue 12
Displaying 1-7 of 7 articles from this issue
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1981 Volume 34 Issue 12 Pages T248
Published: 1981
Released on J-STAGE: February 12, 2010
JOURNAL FREE ACCESSDownload PDF (64K) -
1981 Volume 34 Issue 12 Pages T255
Published: 1981
Released on J-STAGE: February 12, 2010
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Part 2 : Influence of Different Factors on the Falling BehaviorsAkira Horikawa, Kunji Chiba, Kenzo Nishitani, Toru Ueshima1981 Volume 34 Issue 12 Pages T238-T248
Published: December 25, 1981
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSInfluences of the initial position, initial angle, diameter and number of slender bodies on the falling behaviors of two or three slender bodies in still water have been investigated experimentally. The obtained results are as follows :
(1) The larger the initial angle, the stronger the interference between two slender bodies.
(2) The longer the initial distance between two slender bodies, the longer the time until the first collision. The trailing slender body tends to collide nearer the front end of the leading body.
(3) When the diameter is larger, the attitude and the translational velocity changes more rapidly due to the influence of von Karman's vortex street.
(4) When three pieces of slender body fall down successively, the motion of the last body is complicated because it is simultaneously affected by the flow produced from the preceeding two bodies.View full abstractDownload PDF (1274K) -
Part 3 : An Analysis of Two-Layered Body ProblemMorihiro Yoneda, Sueo Kawabata1981 Volume 34 Issue 12 Pages T249-T255
Published: December 25, 1981
Released on J-STAGE: February 12, 2010
JOURNAL FREE ACCESSThe phenomenon of transient heat conduction in a film consists of two layers having different thermal properties is analyzed. A theorectical basis is assumed to predict the warm-and-cool feeling when human skin touches the surface of a two-layered body. The two-layered body is considered to be a mathematically simulated model for fabrics whose outer surface structure is different from the body of fabric. The transient heat flow from a heat source having finite heat capacity to' the two-layered body was analyzed in relation to the heat conduction properties of each two layers. From the solution so obtained, the following effects can be explained. Firstly, the heat flow in the short interval immediately after the heat source touches the surface of the two-layered body depends only on the thermal property of the outer surface layer. That is, the warm-and-cool feeling when human skin touches the two-layered body depends only on the outer surface material. Secondly, when the the bottom layer is a thermal insulation material, the effect of insulation in the transient heat conduction depends on the thermal property and thickness of the bottom layer except for the short interval. In this latter case, the thermal parameter which relates to the transient conduction is √ρ1C1K1, where ρ1, C1, K1 are density, ' specific heat and thermal conductivity of the bottom layer respectively.View full abstractDownload PDF (792K) -
T. Ishida1981 Volume 34 Issue 12 Pages P525-P531
Published: December 25, 1981
Released on J-STAGE: October 27, 2009
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Y. Ogita, Y. Nakano, K. Uemura1981 Volume 34 Issue 12 Pages P532-P544
Published: December 25, 1981
Released on J-STAGE: October 27, 2009
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[in Japanese]1981 Volume 34 Issue 12 Pages P545-P552
Published: December 25, 1981
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (931K)
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