Definition of pressure Pressure is defined as normal force exerted by a fluid on per unit area. Counterpart of pressure in solids is normal stress. SI unit of pressure is pascal (Pa). 1 Pa = 1 N/m2 Where: N is newton m is meter Units of pressure Pa Bar At Atm Torr Psi Types of… Read More »
What is a thermodynamic system? A thermodynamic system is an area (or volume) in space upon which study is concentrated. Everything outside the system is called surrounding. A system is separated from the surrounding with the help of a boundary. A boundary has zero thickness so it does not contain any matter. Types of boundaries… Read More »
What is fluid mechanics? Before understanding fluid mechanics let us first understand ‘mechanics’. Mechanics is a physical science which deals with the bodies which are either moving or stationary, under the influence of some external force. Mechanics can be further divided into two parts Statics Dynamics Statics deals with the bodies which are at rest.… Read More »
What is a pump? A pump is a mechanical device which is used to move fluid (sometimes also slurry) from one place to another. One of the examples of a pump is the water pump which is used in our houses to carry water from the ground to the tank on the top of house.… Read More »
What is surface tension? Surface tension (or ST) is a property of fluid which is responsible for the formation of enclosed surfaces. For example, Mercury droplets are near spherical (and can also be rolled very easily) and water drops hanging from a tree branch are also near spherical. It is the property which is responsible… Read More »
Types of fluid flow On the basis of different flow conditions, fluid flow can be classified into various types. Viscous and inviscid flow One the basis of viscosity of fluid (in flow) we can classify fluid flows into two types. Viscous Inviscid (Non-Viscous) In viscous flow, the resistance provided by viscosity is considerable. In Inviscid… Read More »
What is a fluid? Before discussing fluids let’s first discuss phases of matter. Matter around us exists in three phases, excluding plasma. Plasma is superheated matter – so hot that the electrons are ripped away from the atoms forming an ionized gas. There three phases of matter are Solid Liquid Gas From the above three… Read More »
What is a chain drive? Before understanding chain drive, let us first understand ‘What is a Chain?’. A chain can be defined as a series of links connected by pin joints. Now we can move on to chain drive. A chain drive consists of an endless chain wrapped around two sprockets. Advantages of chain drive… Read More »
What is a Brake? Brake is a mechanical device which absorbs kinetic energy of moving systems and brings them to rest. This absorbed kinetic energy is converted into heat and then dissipated to the environment. One of the well-known use of brakes is in automobiles, where they are used to either slow down or stop… Read More »
What is a Clutch? A clutch is a mechanical device which is used to connect (or disconnect) two rotating shafts on the will of operator. One of the most prominent application of clutch is in modern automobiles. Many times, it has been found that people confuse between Clutch, Coupling and Brakes. Let us understand differences… Read More »