Types of Simple Manometers Piezometer. This type of Manometers are used for measuring the fluid pressure difference between these two pipes. The pressure in the left limb is due to (a) the column of measuring fluid (e.g. Differential manometer 2D D/2 Vena contracta. mercury) of height h 1 (b) the column of measurand fluid (e.g. As shown in the figure, one end of the piezometer is open to atmospheric pressure, and the other end is connected to the point A, where pressure is to be measured. It can be used for measuring moderate pressures of liquids. The tube is then bent into a U-shape and fixed in an upright position. It is usually bent to form a U-tube and filled with liquid of known specific gravity. Following are the three different types of manometers: Simple manometers A simple manometer is one which consists of a glass tube, whose one end is connected to a point where pressure is to be measured and the other end is open to atmosphere. The difference in the height of the two columns is due to the fact that p1 is greater than p2. A simple manometer can be built by partially filling a clear plastic tube with a colored liquid to allow the fluid level to be easily observed. Pressure Measurement using U-tube Manometer A well known very simple device used to measure the pressure is the U-tube manometer. Differential Manometer At The Same Level For Derivation please watch the video whose link is as given below. https://www.learnthermo.com/T1-tutorial/ch01/lesson-E/pg05.php Here, the acceleration is proportional to the displacement, so the motion is simple harmonic and the period T is, T = 2π/ω = 2π √(l /2g) [The results of a combined theoretical, mathematical and experimental study of liquid oscillations in an asymmetric U-tube are presented. Let d 1 = diameter at section 1 p 1 = pressure at section 1 v 1 = velocity at section 1 A 1= area at section1 d 2, p 2, v 2, A 2 are the corresponding values at section 2. Tube 1 is open at the end facing the flow. The name U-tube is derived from its shape. ... First consider the very simple situation where the fluid is static—that is, ... A manometer is connected to two tubes that are close together and small enough not to disturb the flow. Piezometer Piezometer is one of the simplest forms of manometers. A] U-Tube Differential Manometer at the same level: In this type of Manometer, two pipes are in parallel condition. The levels of the fluid in the two vertical columns should be equal at this point, as they are currently exposed to the same pressure. U-tube manometer is shown below, Construction of U-tube Manometer: Let me explain you about the construction about the u-manometer. Manometer is a simple and inexpensive device of measuring pressure and pressure difference. The manometer is a device used to measure pressure at a point in a fluid by balancing the column of fluid by the same or another fluid. Figure 14.30 The geometry used for the derivation of Bernoulli’s equation. For equilibrium at the datum point at the bottom of the tube the total pressure in each limb must be equal. The surface of the liquid will move in proportion to changes of pressure. Figure \(\PageIndex{4}\): Measurement of fluid speed based on Bernoulli’s principle. (a) A manometer is connected to two tubes that are close together and small enough not to disturb the flow. This Tube 1 is open at the end facing the flow. Applying Bernoulli’s equations at sections 1 and 2, we get 2 2 1 1 2 2 A dead spot having zero speed is created there. The U-tube manometer is shown opposite. The rise of liquid will be in accordance with the pressure at point A.