Vapour diffusion
Vapour diffusion and condensation
... designer. Vapour diffusion is one mechanism whereby water can find its way into the components of a building and damage the materials or assemblies, although it is not the only ...water vapour with ...
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Laboratory demonstration of solar driven inward vapour diffusion in a wall assembly
... of vapour diffusion in wall ...the vapour diffusion in exterior walls exposed to solar ...inward diffusion of water vapour across the wall as the exterior surface is heated is ...
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Hygrothermal performance of RH-dependent vapour retarder in Canadian coastal climate
... -Width) SVR –With interior paint CONCLUSIONS In this paper a comparison is made between the moisture performances of 2 by 6-in. wood-frame stucco-clad wall systems subjected to the coastal climate of Vancouver that ...
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Wind uplift performance of roofing systems with vapour barrier
... A segment from the measured pressure time history is shown in Figure 7. Figure 7 has three data sets representing NOVB, Poly and SBS systems at two pressure levels of 2.2 kPa (45 psf) and 4.3 kPa (90 psf). These ...
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Vapour barriers: what are they? are they effective?
... a vapour barrier, as ...a vapour barrier (even of zero permeance) that does not seal off the openings will be ...water vapour it is useful to compare the relative amounts of water that should be ...
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Thermal diffusion of water vapour through glass fibre insulation
... water vapour through stagnant air in glass fibre insulation can be related to the gradients of vapour density and temperature by an extended form of Fick’s Law has been shown to give values in good ...
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Équation de diffusion
... 2πσ . Montrer qu’il existe un réel µ tel que F (gσ) = µgσ 0 . La valeur de µ n’est pas à expliciter. II équation de di ffusion avec une condition initiale gaussienne Dans cette partie, σ désigne un réel strictement ...
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La diffusion de la "géographie théorique et quantitative" en France : quel modèle de diffusion spatiale ?
... de diffusion des innovations (Rogers, 1983) : caractériser les centres universitaires en les replaçant sur la courbe temporelle et faire le lien avec leur ...de diffusion : amorce, expansion, ...
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Vapour permeances, air permeances and water absorption coefficients of building membranes
... Mavinkal K. Kumaran 1 , John C. Lackey 2 , Nicole Normandin 2 , and David van Reenen 2 VAPOR PERMEANCES, AIR PERMEANCES, AND WATER ABSORPTION COEFFICIENTS OF BUILDING MEMBRANES ABSTRACT: Building membranes are integral ...
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Accélération de la propagation dans les équations de réaction-diffusion par une ligne de diffusion rapide
... Pour clore l’étude de ce phénomène d’accélération, il reste à comprendre en quelle mesure les ondes de (2) attirent les données initiales. C’est l’objet du Chapitre 3 du présent manuscrit. Dans un premier temps, en ...
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Interpolation process between standard diffusion and fractional diffusion
... 1. I NTRODUCTION Since the seminal work of Fermi-Pasta-Ulam (FPU) [ 6 ], heat conduction in chains of oscillators has attracted a lot of attention. In one-dimensional chains, superdiffusion of en- ergy has been observed ...
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Initiation à une expérience de diffusion d'électrons : la diffusion Compton virtuelle
... réa
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ules nales dans le entre de masse 9 6 Retour dans le référentiel du laboratoire à l[r] ...
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Journal Diffusion Factors – a measure of diffusion?
... Journal Diffusion Factors correlates (Pearson coefficients) When introducing this new definition of the JDF the strong correlation with the number of cites is no longer ...
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Experiments on the condensation and sublimation of water vapour at low temperatures
... L’accès à ce site Web et l’utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D’UTILISER CE SITE WEB. Technical Tr[r] ...
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Water vapour and ozone profiles in the midlatitude upper troposphere
... water vapour in the 5 upper troposphere and lower stratosphere is the NOAA/CMDL frost-point hygrometer (Mastenbrook, 1968; Oltmans, 1985), which is launched on a small ...
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Water vapour and ozone profiles in the midlatitude upper troposphere
... Water vapour and ozone profiles A number of different humidity sensors are available for Vaisala radiosondes: the A and H type Humicap sensors for the RS80 and modified versions of the H type for the RS90 ...
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Chemical vapour infiltration and mechanical properties of carbon open-cell foams
... The pyrocarbon coatings were prepared using pure propane as the precursor. The selection of the substrate temperature T, total pressure P, and residence time t r is essential to control the microtexture of the ...
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Continuous measurements of atmospheric water vapour isotopes in western Siberia (Kourovka)
... water vapour is a valuable source of information for quantifying the pro- cesses controlling the hydrological ...saturation vapour pressures and air diffusivities of the natural stable iso- topologues of ...
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Synthesis of hexacelsian barium aluminosilicate by film boiling chemical vapour process
... chemical vapour infiltration of a mixture of liquid alkoxides which contains all necessary species to synthesize BAS in a woven preform made of Nextel TM 312 alumina-boria-silica ...
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Vapour-liquid equilibria of n-butane and ethyl mercaptan: Experiments and modelling
... Moreover, the knowledge of thermodynamic properties of mixtures of sulfur compounds with hydrocarbons is not only important in gas processing but also in the petroleum and chemical industries. The thermophysical ...
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