Daily Dose 004 | FLUID MECHANICS
How do you find the Contact Angle of a liquid in tube?
In this video, we dive in to an FE Exam Practice Problem in the subject of FLUID MECHANICS, specifically revolving around CAPILLARY ACTION.
Key Definition
What is CAPILLARY ACTION?
CAPILLARY ACTION is the movement of a substance within the spaces of a porous material and is driven by the forces of adhesion, cohesion, and surface tension.
Due to the forces of cohesion (molecules like to stay close together) and adhesion (molecules are attracted and stick to other substances) water, and other substances exhibit a level of “stickiness”.
Adhesion of a substance to the walls of a vessel will cause an upward force on the liquid at the edges and result in a meniscus which turns upward.
The surface tension acts to hold the surface intact.
CAPILLARY ACTION occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules.
The height to which CAPILLARY ACTION will take in a uniform circular tube is limited by surface tension and, of course, gravity.
Check out the video and see how we can go about solving this type of problem in the most efficient manner.
As always, with Love, Prepineer
Video Review
How to determine the Capillary Rise
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