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A.Y. Sakakura

Publications and source records attributed to A.Y. Sakakura.

8 recordsLinked to original sources
USGS1956

Asymptotic expansions of solutions of the heat conduction equation in internally bounded cylindrical geometry

The formal solutions of problems involving transient heat conduction in infinite internally bounded cylindrical solids may be obtained by the Laplace transform method. Asymptotic series representing the solutions for large values of time are given in terms of functions related to the derivatives of the reciprocal gamma function. The results are applied to the case of the internally bounded infinite cylindrical medium with, (a) the boundary held at constant temperature; (b) with constant heat flow over the boundary; and (c) with the "radiation" boundary condition. A problem in the flow of gas through a porous medium is considered in detail.

Journal of Applied Physics↗
USGS1951

Radon in the helium-bearing natural gas of the Texas panhandle

The known quantity of helium in the Texas Panhandle gas reservoir is greater than could be explained by assuming normal geologic conditions. Radon content of the gas varies between about 10 and 250 micromicrocuries per liter (S. T. P.), and the more highly radioactive wells are clustered in several groups. Mathematical analysis indicates that the larger concentrations of radon could not be derived from rocks of normal radioactivity.

Texas↗