knudsen diffusion
11Constrictivity — is a dimensionless parameter used to describe transport processes (often molecular diffusion) in porous media. Constrictivity is viewed to depend on the ratio of the diameter of the diffusing particle to the pore diameter. The value of… …
12Mass diffusivity — This article is about coefficient of molecular diffusion of mass. For other uses, see Diffusivity (disambiguation). Diffusivity or diffusion coefficient is a proportionality constant between the molar flux due to molecular diffusion and the… …
13Porosity — or void fraction is a measure of the void (i.e., empty ) spaces in a material, and is a fraction of the volume of voids over the total volume, between 0–1, or as a percentage between 0–100%. The term is used in multiple fields including… …
14Gas separation — Gas mixtures can be effectively separated by synthetic membranes. For other methods see adsorption, absorption, cryogenic distillation. Membranes are employed in: * separation of hydrogen from gases like nitrogen and methane * recovery of… …
15Polymeric membranes — are membranes that take the form of polymeric interphases, which can selectively transfer certain chemical species over others. There are several mechanisms that could be deployed in their functioning. Knudsen diffusion and solution diffusion are …
16THERMODYNAMIQUE - Processus irréversibles linéaires — Jusqu’à ce que la thermodynamique ait été en mesure d’en fournir une présentation unifiée, les phénomènes de transport qui intéressent les milieux matériels furent étudiés de manière séparée et en ordre plutôt dispersé, sans qu’au delà… …
17SAFER — In cryptography, SAFER (Secure And Fast Encryption Routine) is the name of a family of block ciphers designed primarily by James Massey (one of the designers of IDEA) on behalf of Cylink Corporation. The early SAFER K and SAFER SK designs share… …
18SAFER (cryptographie) — Pour les articles homonymes, voir SAFER. SAFER un tour de SAFER Résumé Concepteur(s) …
19SAFER (informatique) — SAFER (cryptographie) Pour les articles homonymes, voir SAFER. SAFER …
20Safer (cryptographie) — Pour les articles homonymes, voir SAFER. SAFER …
