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Yasuhiko Tonooka, Isao Endo, Shuichi Aiba
1973 Volume 37 Issue 9 Pages
866-868
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Mitsuo Okazaki
1973 Volume 37 Issue 9 Pages
869-874
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Isao Endo
1973 Volume 37 Issue 9 Pages
874-878
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Yoichi Maruyama
1973 Volume 37 Issue 9 Pages
879-882
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Takashi Matsumoto, Masao Noguchi
1973 Volume 37 Issue 9 Pages
882-886
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Ryuichi Sudo
1973 Volume 37 Issue 9 Pages
886-890
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Hiroshi Tokuda
1973 Volume 37 Issue 9 Pages
891-894
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Shiro Nagai
1973 Volume 37 Issue 9 Pages
894-899
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Tomotari Mitsuoka
1973 Volume 37 Issue 9 Pages
899-901
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Hideo Ueyama
1973 Volume 37 Issue 9 Pages
901-907
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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1973 Volume 37 Issue 9 Pages
908
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Shozo Saotome
1973 Volume 37 Issue 9 Pages
909-914
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Masayuki Kasajima, Yoshiro Mori
1973 Volume 37 Issue 9 Pages
915-920,a1
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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The results of experimental study on flow characteristics of blended highpolymer melts (bicomponent) are as follows:(1) the relation between shear stress and shear rate of a bicomponent melt is a function of the relations between shear stress and shear rate of each highpolymer component, a blend fraction in weight of the component and a correction factor of the blend fraction. The functional relation is expressed as
ln{τ
1·2(γ
a)}=φ(
c, γ
a)
cln{τ
1(γ
a)}
+[1-φ(
c, γ
a)
c]ln{τ
2(γ
a)}
where τ is shear stress, γ is shear rate, φ is correction factor of blend fraction, and
c is blend fraction in weight; suffix: 1·2 is blended; 1 is 1st mono component; 2 is 2nd mono component.(2) the correction factor is further a function of
c and γ. It is expressed as
where λ and ξ are functions of
c respectively. Using the last relation, the flow characteristics of bicomponent highpolymer melts in high shear rate region can be estimated with the characteristics obtained experimentally for low shear rate.
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The effect of coexisting ions on the adsorption of surfactant solution
Tadashi Shirotsuka, Masahiro Ishiwata
1973 Volume 37 Issue 9 Pages
921-925,a1
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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For the adsorption of surfactant at air-water interfacethe Davies adsorption equation was found to be applicable; it can be approximated as For D. B. S. the explicit form of above equation was derived as ea=2.57 (
CBC2)
1/2×10
-7This equation agreed well with the experimental data. Using above equation, we derived the eliminationratio for bubble fractionation of D. B. S. as of unction of total ion concentration as
The experimental data were in close agreement with above equation.
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Hideo Shinagawa, Yoshiyuki Takeuchi, Yuji Kawamura
1973 Volume 37 Issue 9 Pages
926-930,a1
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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The evaporation coefficients under high vacuum environment for two organic samples, biphenyl andnaphthalene, obtained by condensation from the vapor and recrystallization from the melt, have been measured.
It was found by microstructural observation that the sublimation of biphenyl should be affected greatly by crystal boundaries, while that of naphthalene should be independent of crystal boundaries.
The possible mechanisms of sublimation are discussed, with reference to the evaporation theories of Knacke et al. and Hirth-Pound.
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Yasuhiko Tonooka, Ichiro Inoue
1973 Volume 37 Issue 9 Pages
931-936,a1
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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The axial mixing phenomena in a packed bed are described by a two-dimensional dispersion model in the transient domain. The formula which expresses the axial dispersion of time or space can be related to the friction factor, the mean velocity, the packed height and the characteristic length. To confirm this relation, experiments by means of the pulse testing method between two points on the center of the bed were made by using packed beds of various height, which were filled with two different sizes of glass beads. The experimental results satisfy the relation approximately. And the characteristic length, which is an important factor representing the scale of the transient domain, is nearly six times the diameter of the beads.
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Kazumi Sato, Ichiro Inoue
1973 Volume 37 Issue 9 Pages
937-943,a1
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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The similarity conditions for circulation time distribution and residence time distribution are shown, and the relations between these conditions and scaleup are investigated theoretically and experimentally in the region of turbulent flow. For geometrically similar stirred vessels, circulation time distribution retains similarity during scale-up, although the average circulation time varies according to each criterion. The similarity of residence time distribution is retained when the product of average residence time and rotational speed of impeller is kept constant. At equal average residence time, this condition is not fullfiled for scale-up by equal power per unit volume, equal peripheral speed of impeller, equal Reynolds number, etc., and the deviation from an ideal mixer increases with scale-up.
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Yasuo Tamaki, Shiro Ito
1973 Volume 37 Issue 9 Pages
943-949,a1
Published: September 05, 1973
Released on J-STAGE: December 01, 2011
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The effect of immersion depth of the impeller on the power of a horizontal shaft agitator used as a gas-liquid contactor has been investigated.
In lower Froude number region, power number may be expressed by the sum of two terms: standard power number (Np)S and additional power number Δ.
It is found that (
Np)
s is the power number owing to the drag force of the impeller blade moving through liquid and Δ is the power number owing to the deformation of liquid surface caused by impeller blade which was immersed into and emergent from the liquid.
When the liquid surface is below the center of the rotating shaft, (
Np)
s is proportional to the dimension-less integral I derived from theoretical considerations and Δ is proportional to the dimensionless immersion depth of impeller.
In higher Froude number region, power number is proportional to the dimensionless integral.
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Daizo Kunii, Taiseki Kunugi, On Yuzawa, Nobuaki Kunii
1973 Volume 37 Issue 9 Pages
949-953,a1
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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Three circulation systems were investigated experimentally, in each of which solid particles circulated in steady state between two fluidized beds.
The first and second system were both composed of two fluidized beds, namely 38mm and 50mm
I. D., while the third had beds of 80mm and 100mm
I. D.,
Pressure distribution in the vertical direction as well as the linear velocity of descending solid particles were measured, and then the stability of the solid circulation was checked in each system.
Comparing the above three systems with each other, the third was judged to be superior and suitable for further application, for instance in production of olefins from heavy oil.
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Koreatsu Miyahara, Hideo Sadotomo, Tomoaki Komori, Eiji Hirai, Akio Ni ...
1973 Volume 37 Issue 9 Pages
953-966,a1
Published: September 05, 1973
Released on J-STAGE: October 07, 2010
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