Numerical Calculation of Concentration Profiles within Thermal Diffusion Column with Continuous Feed and Draw-Offs

Yamamoto, Ichiro; Yamagishi, Keita; Kanagawa, Akira

doi:10.1080/18811248.1987.9735819

Cited by 36 publications

(2 citation statements)

References 7 publications

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“…The experimental data were compared with analytical results** from the two-dimensional axisymmetric separative analysis< 10 >, where the coefficient of diffusion D. 48 and the thermal diffusion constant ar were obtained from the kinetic theory of gases(n) (lZ) using the Lennard-Jones (12-6) (L-J) potential or the generalized Dymond-Alder (D-A) potential< 13 …”

Section: Resultsmentioning

confidence: 99%

Measurement of Separative Characteristics of Thermal Diffusion Column for Argon Isotope Separation

Yamamoto

Baba

Kanagawa

1987

Journal of Nuclear Science and Technology

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Performances of separation of 36 Ar and 40 Ar isotopes were measured by changing feed rate, cut and/or hot wire temperature in a 950 mm-height thermal diffusion column with an inner tube of 7.5 mm radius and a hot wire of 0.3 mm in the axis. The column was operated at 0.1 MPa, and feed flow rate and cut were regulated in a good reproducibility with three sets of thermal mass flow controllers for feed and upper and lower draw-offs. The temperature of the Mo hot wire was controlled by the density of an electric current based on the relation between the temperature and an electric resistance of the wire. Abundance ratio of 36 Ar to 40 Ar was measured with the Q-pole mass filter, whose outputs being calibrated by means of a double-focused mass spectrometer.The data obtained were compared with analytical results of a separative analysis based on numerical solution of axisymmetric convection-diffusion equation. The coefficient of diffusion and the thermal diffusion constant were obtained through the Lennard-Janes 12-6 (L-J) or the generalized Dymond-Alder (D-A) potentials. The measured dependences of separation factor and separative power on feed rate, cut and/or temperature difference between hot wire and cold wall surfaces were predicted fairly well by the D-A potential rather than by the L-J potential, although the measured separative power was a little smaller than analytically predicted one.

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Section: Resultsmentioning

confidence: 99%

Measurement of Separative Characteristics of Thermal Diffusion Column for Argon Isotope Separation

Yamamoto

Baba

Kanagawa

1987

Journal of Nuclear Science and Technology

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“…of the convection-diffusion equation (8) with flow vectors, temperature and density profiles (obtained beforehand at the step (1)) being input. The theory was verified by comparison of experimental data of Ar isotope separation ; the measured dependence of separation factor and separative power on feed rate, cut and/or temperature difference between hot and cold surfaces were predicted fairly well (9).…”

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confidence: 99%