Surface Tension and Capillary Action

Surface tension arises from intermolecular forces at the interface between a liquid and another phase, such as air or a solid surface. It causes liquids to minimize surface area and governs phenomena like droplet formation and wetting behavior. Capillary action occurs when surface tension and adhesive forces cause a liquid to rise or fall in narrow spaces against gravity. This effect is prominent in porous materials, plant vascular systems, and microfluidic devices. Surface tension and capillarity play crucial roles in fluid transport at small scales, where gravitational forces are weak. These phenomena are fundamental to processes such as ink absorption, soil moisture retention, and biological fluid transport. Theoretical analysis involves balancing surface energy and pressure differences. Understanding surface tension and capillary action is essential for microfluidics, material design, and biological systems where interfacial effects dominate fluid behavior.