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Pressure increased drastically so that mercury enters the sample pores Capillary pressure curve from the mercury injection method. This method is well suited to irregular rock samples ( e.g. those found in drill cuttings) and is typically used to understand the relationship between capillary pressure and the porous structure of the sample. [ 12 ]
In physics, the Young–Laplace equation (/ l ə ˈ p l ɑː s /) is an algebraic equation that describes the capillary pressure difference sustained across the interface between two static fluids, such as water and air, due to the phenomenon of surface tension or wall tension, although use of the latter is only applicable if assuming that the wall is very thin.
The rate at which fluid is filtered across vascular endothelium (transendothelial filtration) is determined by the sum of two outward forces, capillary pressure and colloid osmotic pressure beneath the endothelial glycocalyx (), and two absorptive forces, plasma protein osmotic pressure and interstitial pressure (). The Starling equation is the ...
In petroleum engineering, the Leverett J-function is a dimensionless function of water saturation describing the capillary pressure, [1] = / where is the water saturation measured as a fraction, is the capillary pressure (in pascal), is the permeability (measured in m²), is the porosity (0-1), is the surface tension (in N/m) and is the contact angle.
English: Capillary pressure curve from mercury intrusion method, that is, mercury penetrates the core sample. Three key pressure points are of interest for estimating petrophysical properties or facies classification: Entry pressure (Pe): indicates the entry point of mercury in the largest pore throats of the core pore space.
The U.S. Bureau of Mines (USBM), developed by Donaldson et al. in 1969, is a method to measure wettability of petroleum reservoir rocks.In this method, the areas under the forced displacement Capillary pressure curves of oil and water drive processes are denoted as and to calculate the USBM index.
where is the sum over the participating pressures, such as the atmospheric pressure , the hydrostatic pressure and the equivalent pressure due to capillary forces . η {\displaystyle \eta } is the viscosity of the liquid, and ϵ {\displaystyle \epsilon } is the coefficient of slip, which is assumed to be 0 for wetting materials.
The x-axis often describes end-diastolic volume, right atrial pressure, or pulmonary capillary wedge pressure. The three curves illustrate that shifts along the same line indicate a change in preload, while shifts from one line to another indicate a change in afterload or contractility. A blood volume increase would cause a shift along the line ...