The breakup of a contracting liquid jet in the atmosphere was experimentally studied to confirm the theoretical analysis which had been reported by the authors.It was found that the theoretical and experimental breakup length of a laminar jet are in good agreement.The diameter of drops formed from a laminar jet agrees with the modified equation in which the wave length of surface disturbance for acylindrical jet is used.Furthermore, the initial amplitude of surface disturbance, which is necessary to predict the breakup length and drop size by the theo retical equations, is correlated with the dimensionless group μ/√ρD₀σ.

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Effective thermal conductivity k_e of laminated electrical insulation paper, as a kind of compressible and porous media, is a function of burden pressure b and atmospheric pressure p. A heat flow model which has two paths, of contact portion and of void, is introduced in analysis, and the result is as follows
where k₀ (b) is equal to k_e at p=0, and is approximately a linear function of b.kn the thermal conductivity of air, υ_sf (b) is a kind of void fraction and can be determined by measurement of thickness variation with burden pressures.Variable x is proportional to p, and K(x) is a function of x, which depends on a distribution of void size of the laminated paper. The above parameters are obtained by a series of experiments so that k_e at arbitrary values of b and p can be calculated by this semi-theoretical equation.A series of experimental data in the range of b=0.27-1.02 kg/cm² and p=0.3-760 mmHg shows validity of the equation.

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An calculation method for air cooled exchangers with water spray is presented.The phenomena of vaporization of water spray into air are analysed in the viewpoint of simultaneous heat and mass transfer on finned tubes.In the calculation method, it is assumed that air flow is saturated through the exchanger and finned tube surfaces are wetted homogeneously. Under suitable spray conditions, the transfer area calculated by this method are good agreed with the area of experimental apparatus.This indicates that the calculation method is proper to commercial exchanger design.

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Numerical solutions of the boundary layer equations of natural convection of a non-Newtonian Sutterby fluid along a vertical plate are obtained for the both cases of uniform wall temperature and uniform wall heat flux.
From the solutions, the following expressions are derived for local Nusselt numbers:
(uniform wall temperature)
(uniform wall heat flux)
The exponents m and m′ are represented as the functions of Pr₀ and two non-Newtonian parameters A and Z₀ (or Z₀^*).
These expressions are found to be in good agreement with experimental measurements obtained with aqueous solutions of PEO and CMC.

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The intraparticle diffusion coefficient for the adsorption of CH₄, C₂H₄, C₂H₆, C₃H₃ and n-C₄H₁₀ on silica-alumina catalysts were obtained by the breakthrough measurements.The results suggest that surface diffusion was a significant fraction of the total intraparticle mass transfer.Surface diffusion coefficients were of the order of 10^-4 cm²/sec for these gaseous systems.The activation energies for surface diffusion were about one-third of heats of adsorption. The surface diffusion coefficients of this work and those by numerous investigators were correlated with Henry's law of adsorption.Hopping molecular behavior is assumed in these systems, the surface diffusion mechanism may be explained reasonably.

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Fibrous packed beds were used for collecting the polydispersed aerosols over the range of 3-13μ inparticle diameter.Experimental single fiber collection efficiencies for a given particle diameter were obtained by measuring the particle size distribution and concentration of filter inlet and outlet.The results were in fairly good agreement with the theoretical efficiencies of an isolated cylinder due to the combined effect of gravitational settling, inertia and interception.
In addition, the processes from the settling predominant region to the diffusion were discussed quantitatively, when particle diameters were decreased at low flow velocities.It is conduced that the total efficiencies are expressed by the sum of the combined settling and interception efficiencies obtained in our previous paper and the diffusion term of Friedlander's semi-empirical equation.

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Solubility curve and tie-lines were determined for the methyl isobutyl ketone-1, 2-dichloroethane-water system at 25°C.
The liquid-liquid equilibria data were well correlated by Othmer's plots.In this ternary system, isopycnic tie-line is formed at 43.6 weight percent of methyl isobutyl ketone in organic solvent layer.For a ternary system with two partially miscible binaries, conditions for having isopycnic tie-line were also discussed.

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Vapor-liquid equilibrium data are reported for two binary systems of 1, 2-dichloroethane-methyl ketone and methanol-toluene at 760mm of Hg. As expected from classification proposed Ewell et al., the 1, 2-dichloroethane-methyl isobutyl ketone binary system shows negative deviation from Raoult's law. However, contrary to our expectation, this system does not form an azeotropic mixture.
The other hand, the methanol-toluene binary system forms an azeotropic mixture at 63.6°C and at 0.886 mole fraction methanol.

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