Capillarity: Capillarity is a phenomenon of rise or fall of liquid surface relative to the adjacent general level of liquid. This phenomenon is due to the combined effect of cohesion and adhesion of liquid particle. The rise of liquid level is known as capillary rise whereas the fall of liquid surface is known as capillary […]

Surface Tension

Surface Tension: Surface Tension – Due to molecular attraction, liquids have properties of cohesion and adhesion. Cohesion is due to the force of attraction between molecules of same liquid. Otherwise,the intermolecular attraction holds the liquid molecules together is known as cohesion. This force is very small. It enables the liquid to withstand a small tensile […]

Viscosity Unit

Viscosity Unit: Viscosity – As already explained, a fluid is a material which will continue to deform with the application of shear stress. However, different fluids deform at different rates when the same shear stress is applied. Viscosity is the property of a fluid which determines the amount of resistance to a shearing stress. A […]

Properties of Fluids

Properties of Fluids: The following properties of fluids are of general importance to the study of fluid mechanics. 1. Mass density (ρ): Mass density or Density is defined as the mass per unit volume i.e., mass of the fluid contained in Imivolume. It is denoted by a Greek symbol ρ (rho). Its unit is kg/m3. […]

Classification of Fluids

Classification of Fluids: Classification of Fluids are as follows. Ideal fluids and Real or Practical fluids. Newtonian fluids and Non-Newtonian fluids. (1) Ideal Fluids: Ideal fluids are having following properties. It is incompressible. It has zero viscosity. Shear force is zero when the fluid is in motion i.e. No resistance is offered to the motion of […]

Fundamental Units Definition

Fundamental Units Definition: All physical quantities are measured in certain units. There arc two types of Fundamental Units Definition: Fundamental units Derived units Fundamental units: All the physical quantities arc expressed of the following three fundamental units: Length (L) Mass (M) Time (T) Derived units: some units called derived units are expressed in terms of […]