Numerical calculation of concentration profiles within thermal diffusion column with continuous feed and draw-offs.

Isotope Separation of H2-HD Gas Mixture with "Cryogenic-Wall" Thermal Diffusion Column with a Heated Tube.

“…The experimental data were compared with results obtained from the rigorous numerical calcurations. [8][9][10][11] Figure 3(a) shows valiations of separation factors as function of cut θ in the case heated by hot-water T water = 313 K, and Fig. 3(b) heated by water-vapor T vapor =403 K at 101 kPa.…”

“…Separative performances of the CW-TD column were estimated by using the previously developed code. [8][9][10][11] Basic equations and numerical procedure of the present calculation were the same as those of the code. Here, physical properties used in the calculation as inputs were described.…”

“…In the last decade, rigorous numerical codes [8][9][10][11] have been improved 12,13) to predict experimental data of hydrogen isotope separation in the case where the degree of separation is very large. More precise experimental data are indispensable for practical design of the tritium handling system by the column.…”

Effect of Cold Wall Temperature of Thermal Diffusion Column on14N15N—14N2Isotope Separation

“…For minute surveys, an axisymmet-ric two-dimensional numerical analyses have been developed for obtaining flow field and concentration distribution of isotopic gas mixture, such as argon< 4 l-( 6 ) and hydrogen<7l- ( 9 ) in the column. The numerical analyses require thermal diffusion factors which are experimentally determined or predicted by the kinetic theory of gases< 8 )( io)( 11 ).…”