Viscosity: Interfacial tension and its role in multiphase flows| lecture|
The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. For liquids, it corresponds to the informal concept of "thickness"; for example, honey has a much higher viscosity than water.Interfacial tension is the force that holds the surface of a particular phase together and is normally measured in dynes/cm.