All issues
Volume 10, Issue 1
Displaying 1-18 of 18 articles from this issue
- |<
- <
- 1
- >
- >|
-
YOSHIRO KITAMURA, KAZUNORI EGAWA, TERUO TAKAHASHI1977 Volume 10 Issue 1 Pages 1-5
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSStability theory is applied to the liquid jet ejected from a rotating nozzle, and the breakup length and the drop size are analyzed. By the ejection of water, methanol and aqueous glycerol solution from a nozzle rotating at 250-1450 rpm, the breakup length and drop size were measured.
As the liquid velocity increases, the single drop formation, laminar, and turbulent jet are observed. The laminar breakup length increases with the increase of the liquid velocity and the rotating velocity. The diameter of drops formed from the laminar jet increases with the increase of the liquid velocity and decreases with the increase of the rotating velocity. Predictions show a good agreement with experimental data of breakup length and drop size.View full abstractDownload PDF (471K) -
HIROAKI UEDA, YOICHI TAKASHIMA1977 Volume 10 Issue 1 Pages 6-13
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSNumerical analyses were carried out on the desublimation rate of two component vapors from a gaseous mixture including a noncondensable gas in an annular cold trap, assuming that two vapors formed a compact solid phase and were insoluble in the solid state. It was predicted that there were two different patterns on the distribution of the mass fraction in the solid phase, where one showed a continuous change and another had a maximum or a minimum.
The experimental studies were made using benzene and p-xylene as vapors. As the p-xylene mass fraction in the solid phase increased, the solid phase varied from a compact form to a frosty form, and consequently its apparent density decreased. The experimental results were in very good agreement with the calculated results on the thickness, and also fairly good on the distribution of mass fraction in the solid phase.View full abstractDownload PDF (644K) -
ADSORPTION OF DBS AT THE LIBERATION OF SINGLE BUBBLES FROM A CAPILLARY TUBEKEIICHI KATO, ISSEI NAKAMORI1977 Volume 10 Issue 1 Pages 14-19
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSBy using the measured values of surface tension in SDBS (sodium dodecylbenzene sulphonate) solutions, the ratio of surface excess of DBS- (dodecylbenzene sulphonate ion) at the liberation of single bubbles from a capillary tube to that in equilibrium was investigated. The effect of both DBS- and the coexisting salts on the ratio was also examined.
Used coexisting salts were NaCI, MgCl2 and AlCl3. The surface tension at the liberation was determined by measurement of the pressure required to liberate bubble from a vertical capillary tube immersed in the test solutions (method of maximum bubble pressure). The surface tension of the solutions in equilibrium was also measured by the Whilhelmy method.View full abstractDownload PDF (414K) -
KEIICHI KATO, KOICHIRO KUSUNOKI, ISSEI NAKAMORI1977 Volume 10 Issue 1 Pages 20-26
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSThe adsorption rate of surfactant ion in foam separation technique was experimentally studied. By using SDBS (sodium dodecylbenzene sulphonate) as surfactant and NaCl as coexisting salt, foam separation experiments in a continuous-flow foam column were carried out, and following facts were obtained.
It was found that there was a large amount of surface excess of DBS- at the liberation of bubbles from a sparger. In a non-salt system (SDBS solution), the adsorption rate equation of Langmuir''s type could be well applied to the adsorption of DBS-, in the region of bulk concentration of DBS- in which the Langmuir adsorption isotherm can be applied. In the case of 0.17-0.19 cm of bubble diameter, surface excess of DBS- attained to an adsorption equilibrium within one second, and the apparent adsorption rate became more rapid than that in the case of 0.06-0.07 cm of bubble diameter. Moreover, the adsorption rate increased more than that in a non-salt system, by the addition of NaCl.View full abstractDownload PDF (505K) -
KENJI HASHIMOTO, KOUICHI MIURA, MASAFUMI TSUKANO1977 Volume 10 Issue 1 Pages 27-34
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSThe validity of methods for designing fixed-bed adsorbers is experimentally examined. The breakthrough curves predicted by two design methods without the assumption of the constant pattern and three methods with the assumption are compared with those obtained from the experiments of the liquid phase fixed-bed adsorption of DBS and p-nitrophenol on an activated carbon (CAL). A diagram is presented for estimating minimum column lengths required to establish the constant pattern for the Freundlich isotherm. The validity of this diagram is also examined experimentally.View full abstractDownload PDF (613K) -
KEN TOYOKURA, JUNICHI MOGI, IZUMI HIRASAWA1977 Volume 10 Issue 1 Pages 35-39
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSSecondary nucleation rate of K-afum was studied by adding controlled amounts into a stirred vessel. Change in number of produced nuclei against the elapsed time was observed by direct counting, and the results were featured by slight increase in number at the initial stage, followed by rapid increase in constant elapsed time specified by the particular supersaturation. The existence of a definite size to contribute to following nucleation was recognized, and this size was minimum for secondary nucleation and correlated with supersaturation. Minimum size was proposed as a new effective factor on the secondary nucleation rate, and secondary nucleation rate per unit surface of crystals near minimum size was correlated with supersaturation and agitation rate in the stirred vessel. Secondary nucleation rate in the stirred vessel was also discussed in comparison to that in the fluidized bed. The primary nucleation in the stirred vessel and latent period for the produced nuclei to grow to minimum size to contribute to following nucleation were also discussed.View full abstractDownload PDF (410K) -
BEHAVIOR OF SOLID PARTICLES AND TORQUE REQUIREMENTSTAKASHI SHIRAI, MASARU ISHIDA, YOSHIAKI ITO, NORIO INOUE, SHOJIRO KOBA ...1977 Volume 10 Issue 1 Pages 40-45
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSWhen a horizontal disk was rotated within a particle bed, there appeared three different zones above the rotating disk: The central one (inner rigid zone) rotated together with the disk, whereas the peripheral one (outer rigid zone) remained stationary. In the intermediate one (deformation zone or velocity-gradient zone), the velocity of particles varied from zero to that of the inner rigid zone. The shape of these zones and the torque needed for rotating the disk were affected by the rotation speed of the disk, the bed height, the size of the disk, and the flow velocity of the gas supplied from the bottom of the bed. The interrelation between the shape of these three zones and the torque requirements was discussed.View full abstractDownload PDF (407K) -
KIKUO OKUYAMA, YASUO KOUSAKA, TOSHIHIRO MIYAZAKI, TETSUO YOSHIDA1977 Volume 10 Issue 1 Pages 46-53
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSConventional particle size analysis by sedimentation method does not give true size distributions but only apparent ones, when Brownian coagulation and Brownian diffusion exist. The difference of true and apparent size distributions was theoretically evaluated by numerically solving the population balance equation under various conditions. Then some of the theoretical results were verified experimentally for particles having various sizes and number concentrations which were obtained under sedimentation in air, in water and in centrifugal field by means of ultramicroscopic size analysis. In addition to these analyses, two parameters consisting of given measuring conditions, which were proposed herein, were found to be useful to predict whether or not coagulation and diffusion effects exist in actually observed size distributions.View full abstractDownload PDF (695K) -
MOMPEI SHIRATO, TSUTOMU ARAGAKI, EIJI IRITANI, MASAAKI WAKIMOTO, SATOS ...1977 Volume 10 Issue 1 Pages 54-60
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSA filtration theory for the power-law non-Newtonian fluids is developed on the basis of the extended Rabinowitsch-Mooney equation, and several definitions of non-Newtonian filtration characteristics are defined. The equations presented in this paper may be considered as equations applicable both for non-Newtonian filtration and for conventional Newtonian filtration. Methods for evaluating the overall characteristics of non-Newtonian filtration are suggested by using the compression permeability data. In order to confirm the validity of the theory, constant pressure filtration experiments are carried out under various conditions of the flow behavior index N ranging from 0.404 to 0.504 and the filtration pressure p from 1000 to 3000 G/cm2, and it is shown that the methods presented in this paper are valid. It is also shown that the average specific filtration resistance varies considerably with change in the N-value of the power-law, and the cakes formed from non-Newtonian filtration of pseudo-plastic fluid are denser than those from usual Newtonian filtration.View full abstractDownload PDF (551K) -
KATSUMI TOCHIGI, KAZUO KOJIMA1977 Volume 10 Issue 1 Pages 61-63
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSDownload PDF (176K) -
ISAMU NAGATA, SHUHEI YASUDA1977 Volume 10 Issue 1 Pages 64-65
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSDownload PDF (136K) -
HIDEKI TSUGE, SHIN-ICHI HIBINO1977 Volume 10 Issue 1 Pages 66-68
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSDownload PDF (238K) -
YOSHINORI KAWASE, YASUO HIROSE1977 Volume 10 Issue 1 Pages 68-70
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSDownload PDF (222K) -
HIDEO TESHIMA, YOSHIO OHASHI1977 Volume 10 Issue 1 Pages 70-72
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSDownload PDF (219K) -
KAZUO TAKEUCHI, Yuzo URAGUCHI1977 Volume 10 Issue 1 Pages 72-74
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSDownload PDF (231K) -
SETSURO HIRAOKA, RYUZO ITO1977 Volume 10 Issue 1 Pages 75-77
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSDownload PDF (198K) -
D. GELBIN, K.-H. RADEKE1977 Volume 10 Issue 1 Pages 78a
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSDownload PDF (76K) -
YASUSHI TAKEUCHI, KUNITARO KAWAZOE1977 Volume 10 Issue 1 Pages 78b
Published: February 20, 1977
Released on J-STAGE: March 30, 2006
JOURNAL FREE ACCESSDownload PDF (77K)
- |<
- <
- 1
- >
- >|