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[in Japanese]
1972 Volume 36 Issue 8 Pages
800-802
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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Haruo Uchiyama, Koichi Iinoya, Kazutaka Makino, Hiroaki Masuda
1972 Volume 36 Issue 8 Pages
803-810
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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Minoru Ikeda
1972 Volume 36 Issue 8 Pages
810-815
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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Eiichi Tanaka
1972 Volume 36 Issue 8 Pages
815-820
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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Masami Tada
1972 Volume 36 Issue 8 Pages
821-826
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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Hitoshi Emi
1972 Volume 36 Issue 8 Pages
826-831
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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T. Isohata, J. Naito
1972 Volume 36 Issue 8 Pages
831-836
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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1972 Volume 36 Issue 8 Pages
838
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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Seiichi Miyazaki
1972 Volume 36 Issue 8 Pages
839-845
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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Jiro Okabe, Masatoshi Yamada
1972 Volume 36 Issue 8 Pages
846-853
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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One plate has a uniform heat flux and the other is thermally insulated
Osamu Miyatake, Tetsu Fujii, Motoo Fujii, Hiroshi Tanaka
1972 Volume 36 Issue 8 Pages
859-864,a1
Published: August 05, 1972
Released on J-STAGE: December 01, 2011
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Natural convective heat transfer between two vertical parallel plates has been analysed numerically.
A uniform heat flux is applied at one plate, while the other plate is thermally insulated.
A forward-marching, implicit method with iteration was used to solve the nonlinear partial-differential equations.
Numerical results are obtained for the variations of velocity, temperature, pressure, induced flow rate, and local Nusselt number for fluids having Prandtl numbers 0.7 and 10.
Experimental measurements with water over a wide range of Rayleigh numbers give local Nusselt nun, bers which are in good agreement with the numerical solution.
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Takeshi Ishikawa, Mitsuho Hirata
1972 Volume 36 Issue 8 Pages
865-871,a1
Published: August 05, 1972
Released on J-STAGE: December 01, 2011
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A new method is developed for calculating the composition profile, the temperature profile and the product compositions in multicomponent distillation, when number of plate, location of feed plate, and operating conditions are specified. This method employs the group relaxation algorithm for the solution of the nonlinear material balance equations at unsteady state condition around each stage in the column.
The nonlinear material balance equations are solved simultaneously for each component, therefore, no matching is required. The method may be started with the assumption only that all the liquid compositions on each stage equal to the feed compositions, and will be applied to either ideal system or nonideal system.
The computational procedure is simple, fast, and numerically stable. Some problems discussed to demonstrate the feasibility of the method.
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Masaki Tsubaki, Hitoshi Hiraiwa
1972 Volume 36 Issue 8 Pages
872-879,a1
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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Modified correlation of Gilliland's convention which is to estimate the required number of equilibrium steps for the enriching and recovery sections separately is obtained from the results of numerical experimentations for various hypothetical feed compositions, separation specifications and
q-values, with the design-oriented rigorous multicomponent distillation calculation method previously proposed by the author. And new shortcut distillation calculation method is proposed on this correlation.
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Masaaki Tsubaki, Hitoshi Hiraiwa
1972 Volume 36 Issue 8 Pages
880-888,a1
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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The distribution of nonkey components which was obtained from the same rigorous numerical experiments for the previous paper is expressed as distribution characteristics curve as well as distribution curve. The relationship between distribution characteristics and step number characteristics defined in the previous paper is found to be able to use for the estimation of the distribution of nonkey components in the conventional multicomponent distillation calculation.
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Hiroshi Kataoka, Terukatsu Miyauchi
1972 Volume 36 Issue 8 Pages
888-896,a1
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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Liquid-phase mass transfer coefficients at the free surface Of agitated vessels in turbulent region were measured by gas absorption for several gas-liquid systems. Experimental results for partially contaminated distilled water were explained by Levich's theory.
Effects of energy dissipation on mass transfer coefficients for organic solvents having clean surface, were found to be similar to those of the surface renewal theory. Local energy dissipation a in the vicinity of free surface was measured by hot wire flow-meter as about 6% of average a in the vessel, by which mass transfer coefficients were correlated fairly well for both organic solvents and distilled water.
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Effects of Partial Pressure of Water., Vapor
Tadashi Chida, Mitsuo Ide, Teiriki Tadaki, Siro Maeda
1972 Volume 36 Issue 8 Pages
896-903,a1
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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Hydrogen reduction of the ground particles of dense hematite was performed in a flow system at temperatures from 350 to 500°C. Fractional conversion of reduction was measured by the chemical analysis (the bromine-methanol method) and simultaneously, the cross-sections of the 'sample particles were observed by microscope.
As the partial pressure of water vapor in reduction gases was low, a concentric layer of magnetite was formed around the hematite core and was followed by a layer of metallic iron. However, as the partial pressure of water vapor became higher, a layer of metallic iron was not formed, but metallic iron was scattered like dots in the magnetic layer.
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Kakusaburo Onda, Hiroshi Takeuchi, Takeshi Kobayashi, Masahiro Takahas ...
1972 Volume 36 Issue 8 Pages
903-907,a1
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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The diaphragm cell made of a Millipore filter has the following advantages: It does not require a long experimental time as compared with the conventional diaphragm cell (made of a sintered glass disk) and a large quantity of liquid as compared with the liquidjet column.
Then, the diffusivities of carbon dioxide and hydrogen sulphide in water and aqueous electrolyte solutions were measured by using this diaphragm cell.
It was found that the agreements between the experimental results and the values estimated by the method of Onda et al. are within a deviation of ±5%.
Therefore, this diaphragm cell is a convenient apparatus which can measure the diffusivity of gases in solutions easily and accurately.
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Yoshio Aoyama
1972 Volume 36 Issue 8 Pages
907-912,a1
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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In crystallizing of sodium sulphate anhydride, having inversely soluble property with temperatures, by Crystal-Oslo crystallizer, it has been known that scaling occurs frequently on the heating pipe of heat exchanger. Scaling data, therefore, were collected as regards this system with nine units of industrial Crystal-Oslo crystallizer and experimental correlations were determined for the induction period in scaling with the degree of supersaturation, solution temperature and pH. As a result, it has become cleared that values of the degree of supersaturation and solution temperature in these experimental equations are appropriate to take values at the inner surface of heating pipe of heat exchanger exit. Effects of factors affecting on scaling, are discussed.
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Teruo Takahashi, Yoshiro Kitamura, Shunsuke Nakahara, Shinichiro Gondo ...
1972 Volume 36 Issue 8 Pages
912-916,a1
Published: August 05, 1972
Released on J-STAGE: October 07, 2010
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