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γ is the surface tension of the liquid in dynes per centimeter or newtons per meter. g is the acceleration due to gravity and is equal to 980 cm/s 2 or 9.8 m/s 2; ρ is the density of the liquid in grams per cubic centimeter or kilograms per cubic meter; Illustration of how lower contact angle leads to reduction of puddle depth
The dyne per centimetre is a unit traditionally used to measure surface tension. For example, the surface tension of distilled water is 71.99 dyn/cm at 25 °C (77 °F). [ 4 ] ( In SI units this is 71.99 × 10 −3 N/m or 71.99 mN/m .)
A stalagmometer is a device for investigating surface tension using the stalagmometric method. It is also called a stactometer or stalogometer. The device is a capillary glass tube whose middle section is widened. The volume of a drop can be predetermined by the design of the stalagmometer. The lower end of the tube is narrowed to force the ...
The x-intercept lands at 39.5 dynes per centimeter (This can be calculated by setting y equal to zero and solving for x) which is less than that of liquid 2, 42.9 dynes per centimeter; therefore, a more accurate measurement of the critical liquid surface tension needed to effectively wet the surface of PC can be obtained by including liquid 2 ...
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.
Dewetting. In fluid mechanics, dewetting is one of the processes that can occur at a solid–liquid, solid–solid [1] or liquid–liquid interface. Generally, dewetting describes the process of retraction of a fluid from a non-wettable surface it was forced to cover. The opposite process—spreading of a liquid on a substrate —is called wetting.
Maximum bubble pressure method. One of the useful methods to determine the dynamic surface tension is measuring the "maximum bubble pressure method" or, simply, bubble pressure method. [1][2] Bubble pressure tensiometer produces gas bubbles (ex. air) at constant rate and blows them through a capillary which is submerged in the sample liquid and ...
Method of determining the surface energy of a solid. An illustration of the sessile drop technique with a liquid droplet partially wetting a solid substrate. θC is the contact angle, and γSG, γLG, γSL represent the solid–gas, gas–liquid, and liquid–solid interfaces, respectively. In materials science, the sessile drop technique is a ...