The reciprocating pumps is a positive displacement pump. It operates on the principle of actual displacement or pushing the liquid by a piston or plunger that reciprocates in a closely fitting cylinder. These pumps usually have one or more cylinders which are alternatively filled with liquid to be pumped and then emptied again. In this
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There are two methods of dimensional analysis used. Rayleigh’s method Buckingham π-Theorem Rayleigh’s Method In Rayleigh’s method, the expression is determined for a variable depending upon maximum three or four variables only. If the number of independent variables becomes more than four, it is very difficult to find the expression for the dependent variable. So,
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One dimensional flow is the type of flow in which the flow characteristics such as velocity, pressure, density, temperature etc. are the function of time and one space co-ordinate only. Mathematically, u=f(x) ; v=0 ; w=0… for steady flow u=f(x) ; v=0 ; w=0… for unsteady flow where u, v and w are velocity components
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Most of the conventional pressure gauges are of a mechanical type. These gauges embody on elastic element which deflects under the action of the applied pressure. This movement mechanically magnified and read with the help of pointer and graduated scale. These pressure gauges are generally used for measuring high pressures and where the high precision
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Manometers is the device which is used for measuring the pressure at a point in a fluid by balancing the column of fluid by the same or another column of liquid. Simple Manometers Simple manometers are used to measure the pressure at a point in a fluid contained in a pipe or a vessel. It
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The surface tension is due to cohesion between particles at the free surface. 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 known as cohesion. This force is very small. It
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Fluid may be defined as a substance which is capable of flowing. It has no definite shape of its own but it confirms the shape of the containing vessel. A small amount of shear force exerted on a fluid will cause it to undergo a deformation. It continues as long as the force is to
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The ideal body having large thermal energy capacity which either continuously supplies or absorbs the infinite amount of heat without changing its temperature is called thermal energy reservoir or heat reservoir. If the reservoir continuously supplies heat energy to the system, it is called a source. The source is always at higher temperature. If the
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The second law of thermodynamics is stated in two ways. Kelvin Planck statement and Clausius statement. Kelvin Planck Statement The Kelvin Planck statement can be expressed as “It is impossible for any device that operates on a cycle process to receive heat from a single reservoir and produce an equivalent amount of work”. Otherwise, it
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Consider an open system through in which the working substance flows as a steady rate as shown in figure. The working substance entering the system at (1) and leaving the system at (2). Let, p1 be the pressure of the working substance entering the system (N/m²) v1 be the specific volume of the working substance
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