WebThe denser fluid will rise in the capillary until the weight of the column of fluid balances the pressure difference across the meniscus. Consider the surface of the meniscus in a circular tube of radius r c as a segment of a sphere with radius r s (Figure 5.3). The cos φ = rc /r s, and substitution into Equation (5.9) yields Equation (5.11). WebOnce condensation has occurred, a meniscus immediately forms at the liquid-vapor interface which allows for equilibrium below the saturation vapor pressure. Meniscus formation is dependent on the surface tension of the liquid and the shape of the capillary, as shown by the Young-Laplace equation.
Capillary rise behavior of lubricant in micropores with spiral bulge ...
The height h of a liquid column is given by Jurin's law where is the liquid-air surface tension (force/unit length), θ is the contact angle, ρ is the density of liquid (mass/volume), g is the local acceleration due to gravity (length/square of time ), and r is the radius of tube. As r is in the denominator, the thinner the space in which the liquid can travel… WebOct 7, 2024 · Considering the meniscus in a cylindrical capillary as an example, when R, the radius of the capillary, is significantly smaller than the capillary length of water, σ ρ g = 2.713 × 10 − 3 m, where ρ and g are the density of water and gravity constant, respectively, and the effect of gravity on the meniscus shape of water is negligible, so ... callaway s grind wedge reviews
Capillary meniscus dynamometry—method for determining the …
When a tube of a narrow bore, often called a capillary tube, is dipped into a liquid and the liquid wets the tube (with zero contact angle), the liquid surface inside the tube forms a concave meniscus, which is a virtually spherical surface having the same radius, r, as the inside of the tube. See more The meniscus (plural: menisci, from the Greek for "crescent") is the curve in the upper surface of a liquid close to the surface of the container or another object, produced by surface tension. A concave … See more The formation of menisci is commonly used in surface science to measure contact angles and surface tension. In a contact angle measurement, the shape of the menisci is measured with a balance or optically with a digital camera. In a surface tension … See more Menisci are a manifestation of capillary action, by which either surface adhesion pulls a liquid up to form a concave meniscus, or internal cohesion pulls the liquid down to form … See more When reading a depth scale on the side of an instrument filled with liquid, such as a water level device, the meniscus must be taken into account in order to obtain an accurate measurement. Depth must be measured with the meniscus at eye level (to eliminate See more • Using menisci to measure surface tension See more WebCapillary action is one of the most common fluid mechanical effects explored in the field of microfluidics. Jurin's law is named after James Jurin, who discovered it between 1718 and 1719. [2] His quantitative law suggests that the maximum height of liquid in a capillary tube is inversely proportional to the tube's diameter. WebJan 19, 2024 · Capillary pressure ( Pc) is defined as the difference in pressure across the meniscus in the capillary tube. Put another way, capillary pressure is the amount of extra pressure required to force the nonwetting phase to displace the wetting phase in the capillary. Capillary pressure can be calculated as follows: , or. where. coats inexpensive