water-vapor diffusion
1Vapor barrier — 6 mil Polyethylene plastic sheet as vapor barrier between insulation and gypsum board …
2Diffusion — The movement of individual molecules through a material; permeation of water vapor through a material …
3Moisture vapor transmission rate — (MVTR), also water vapor transmission rate (WVTR), is a measure of the passage of water vapor through a substance. There are many industries where moisture control is critical. Moisture sensitive foods and pharmeceuticals are put in packaging… …
4Diffusion pump — Six inch oil diffusion pump. Diffusion pumps use a high speed jet of vapor to direct gas molecules in the pump throat down into the bottom of the pump and out the exhaust. Presented in 1915 by Wolfgang Gaede[1] and using mercury vapor, they were… …
5Water pipe percolator — A water pipe percolator is a small additional sub chamber within the main chamber of a water pipe that provides in line smoke water interaction via heat exchange and dissolution.Function and PurposeA percolator works by utilizing a pressure… …
6diffusion — /di fyooh zheuhn/, n. 1. act of diffusing; state of being diffused. 2. prolixity of speech or writing; discursiveness. 3. Physics. a. Also called migration. an intermingling of molecules, ions, etc., resulting from random thermal agitation, as in …
7Dynamic vapor sorption — (DVS) is a gravimetric technique that measures how quickly and how much of a solvent is absorbed by a sample: such as a dry powder absorbing water. It does this by varying the vapor concentration surrounding the sample and measuring the change in …
8Lunar water — Composite image of the Moon s south polar region, captured by NASA s Clementine probe over two lunar days. Permanently shadowed areas could harbour water ice. Lunar water is water that is present on the Moon. Liquid water cannot persist at the… …
9Supercritical water oxidation — or SCWO is a process that occurs in water at temperatures and pressures above a mixture s thermodynamic critical point. Under these conditions water becomes a fluid with unique properties that can be used to advantage in the destruction of… …
10Superheated water — is liquid water under pressure at temperatures between the usual boiling point (100°C) and the critical temperature (374°C). It is also known as subcritical water and pressurised hot water. Superheated water referred to in this article is stable… …
