Hydrogen-Metal Systems

Theoretical Model of Single Fiber Efficiency and the Effect of Microstructure on Fibrous Filtration Performance: A Review

“…Stairmand employed an approach similar to that taken by Langmuir and assumed that the effective time for particle diffusion is π r f / U 0 , and the result is Friedlander and Natanson attempted an improved computation by means of the boundary layer theory. Pasceri and Friedlander obtained the following equation for the SFFE due to diffusion, Torgeson also treated the same problem and suggested that the following equation be used for the diffusion efficiency, where Ω is the dimensionless drag parameter, which can be determined by the following equation, where Δ p is the pressure drop across the filter having the thickness, L .…”

“…As particle size becomes large, the interception effect must be considered in addition to the diffusion effect. In the initial stage of filtration, most scholars believe that the SFFE is the linear superposition of the each filtration mechanism, ,,,,,,, which can be expressed as Other scholars, such as Stechkina, Miecret, and Gustavson have also proposed a SFFE model considering the interaction of diffusion and interception mechanisms, which can be expressed as where or where k Fan = −0.5 ln (α) – 0.52 + 0.64α + 1.43 (1 – α) Kn .…”

NMR studies of the structure of alkali thioborate glasses

“…At the end of this time, the tubes were furnace cooled and taken back into the glovebox where they were broken open and the crystalline material within removed. [69], a receiver similar to that described by Adduci et al [70], with quadrature detector [71].…”