Showing papers on "Countercurrent exchange published in 1975"
TL;DR: In this paper, the effect of some liquid physical properties on gas holdup was investigated in a glass column of 15·9 cm dia and 390 cm high, where the steady-state tracer injection technique and the axial-dispersed-plug-flow model were used.
89 citations
TL;DR: The thermogravitational thermal diffusion (TG) was introduced by Clusius and Dickel as mentioned in this paper, where the fluid is confined between closely spaced vertical walls maintained at different temperatures and a convection current is set up with the fluid rising along the hot wall and descending along the cold wall.
Abstract: Gas liquid and solid mixtures undergo a slight demixing in the presence of a temperature difference. This phenomenon, known as thermal diffusion, is illustrated in Figure 1 for the isotopes of neon in the gas phase and for isotopically substituted carbon disulfide in the liquid phase. The separation effect, which is quite small even for relatively large temperature differences, was of no practical significance prior to the invention by Clusius and Dickel of the thermogravitational thermal diffusion column in 19381. In the thermal diffusion column (Figure 2) the fluid is confined between closely spaced vertical walls maintained at different temperatures. A convection current is set up with the fluid rising along the hot wall and descending along the cold wall. Thermal diffusion takes place In the horizontal direction. The combined effects of vertical countercurrent thermogravitational circulation and horizontal thermal diffusion lead to large separations in the vertical direction. The equivalent o...
27 citations
Patent•
03 Jul 1975
TL;DR: In this paper, an apparatus for countercurrent extraction of a dissolved material from a first liquid phase to a second liquid phase is described, with overflow provision for each of the liquid phases with adjustable overflow for the lower liquid phase whereby desired control of interface level can be obtained.
Abstract: An apparatus for countercurrent extraction of a dissolved material from a first liquid phase to a second liquid phase is disclosed. The apparatus comprises overflow provision for each of the liquid phases with preferably adjustable overflow for the lower liquid phase whereby desired control of interface level can be obtained.
19 citations
TL;DR: In this article, the authors analyzed the effect of a falling liquid tube on the cooling of a hot tube by a sputtering liquid film and provided a solution for the liquid coolant vaporized during its fall from the sputtering film front.
15 citations
01 Dec 1975
8 citations
TL;DR: In this article, a thermally driven countercurrent gas centrifuge is studied theoretically on the basis of Olander's separation theory and the short-bowl flow solution proposed recently by Sakurai and Matsuda.
Abstract: Uranium enrichment in a thermally driven countercurrent gas centrifuge is studied theoretically on the basis of Olander's separation theory and the short-bowl flow solution proposed recently by Sakurai and Matsuda. The separation factor is computed and compared with experimental results by Groth. Agreement of the computed results with experiment is fairly good, except for very low feed rates. Further improvements are discussed.
8 citations
7 citations
3 citations
TL;DR: In this paper, a closed-form frequency domain solution for the dispersive-flow mass transfer model with closed-system boundary conditions is given, which complements an existing solution for steady-state case, and removes a difficulty other workers have noted in modeling the frequency response of continuous countercurrent mass transfer processes.
1 citations