Contrary to the liquids, the viscosity of gas increases with temperature for low pressure, that is, close to atmospheric pressure due to more agitation of molecules. However, at high pressure, the viscosity of gas decreases as the temperature increases. At intermediate pressure, the viscosity of ...
As a result, gas relative permeability decreases as SW increases9. Reservoir rock wettability is another aspect that aggravates the complexity of flow behavior in the porous environment of tight gas reservoirs. The wettability of the internal surfaces of rock pores affects the relative permeability of...
It is shown that as the gas superficial velocity increases, the corresponding liquid holdup decreases. Figure 2. Map of the observed flow patterns and the measured liquid holdup as a function of the gas and liquid superficial velocities at different pipe inclinations, (a) horizontal (0°), (...
occupy interstitial sites in the network rendering fewer sites for easy gas diffusion. Therefore,Qincreases, andDdecreases with increasing modifier concentration, as observed in alkali silicates (Fig. 1). For comparing the effect of different modifier cations, one needs to know the size distribution...
What happens in the lungs when the diaphragm relaxes? a. Air is forced out of the lungs. b. Lung volume increases. c. Intrapulmonic pressure decreases. d. Intrapleural pressure decreases. Fill in the blank. Only the inspired air that reaches the a...
The adsorption of gas causes the matrix swelling, part of which decreases the cleat porosity at the experimental conditions. As we know, the adsorption of carbon dioxide is stronger than that of methane, resulting in greater adsorption strain. A range of properties has to be estimated when the...
Laplace's law also shows that as an inflated bubble decreases in size, the distending pressure proportionally ___ until the pressure reaches what is called the ___. How does surface area affect the following? 1. diffusion of a cube, 2. volume of a cube, 3. surfac...
The infrared intensity on the active detector decreases according to the exponential relationship called the Beer-Lambert Law: where: I is the intensity in target gas. I0 is the intensity in zero gas. k is the absorption coefficient for the specific gas and filter combination. l is ...
Coal-fired power plants are ill-suited to provide flexible energy, as their thermal efficiency decreases and maintenance costs increase when they operate in a flexible peaking role. Furthermore, higher carbon emissions from coal-fired plants cancel out the main benefit of renewable power: clean e...
(2004) reported that increase in gas pressure continuously decreases the apparent diffusion coefficient; however, the influence of pressure on the effective diffusivity is not well established. 4.3 Multi-scale flow modelling According to Wei et al. (2005), there are three types of CBM reservoir ...