As the entry angle is decreased from 90°, the pressure drop decreases. CONTENTS vii 4 Fluids Statics 69 4.1 Introduction . Course. Unit 23 - Fluid Pressure 1. . Fluids are a collection of randomly arranged molecules held together by by weak cohesive forces. Measurement in Fluid Mechanics also features extensive background materials in system response, measurement uncertainty, signal analysis, optics, ﬂuid mechan- ical apparatus, and laboratory practices, which shield the reader from having to Many devices are based on hydrostatics such as barometers and manometers, i.e., determine pressure through measurement of a column (or columns) of a liquid using the pressure variation with elevation equation for an incompressible fluid. PPI FERC Fluid Mechanics FERC Fluid Mechanics. Introduction to Pressure in Fluid Mechanics . The cannula must be connected to a sterile, fluid-filled system, which is connected to an electronic pressure transducer. fluid mech. The local atmospheric pressure is 15 psia. Fluid Mechanics (EGM2204) Uploaded by. Comments . Related documents. . that branch of science is called fluid dynamics. . Fluid Mechanics Overview Gas Liquids Statics Dynamics Air, He, Ar, N 2, etc. 1.2.2 Fluid Mechanics Fluid mechanics is the application of the fundamental principles of mechanics and ther-modynamics – such as conservation of mass, conservation of energy and Newton’s laws of motion – to the study of liquids and gases, in order to explain observed phenomena and to be able to predict behaviour. Definition The study of f1uids in motion, where pressure forces are not considered, is called fluid kinematics and if the pressure forces are also considered for the fluids in motion. . Let the level EF correspond to the surface of contact of the two liquids. 15 MEASUREMENT OF PRESSURE The pressure of a fluid may be measured by the following devices: MANOMETERS: The devices used for measuring the pressure at a point in a fluid by balancing the column of fluid by the same and other liquid. In the English system of units, pressure is expressed as "psi" or lbf/in 2. We will further discuss various types of pressure devices which we use nowadays for measuring fluid pressure in pipes, open channel and also discuss the techniques of measuring atmospheric pressure and pressure … . INTI International University. For example, when a car drives up a mountain (atmospheric air pressure decreases), the (gauge) tire pressure goes up. Selection of pressure gauges depends upon the location and type of fluid flow. 2019/2020. General Energy Equation 8. . Viscosity of Fluid 3. . Pressure always acts inward normal to any surface (even imaginary surfaces as in a control volume). . Fluid mechanics is a discipline within the broad field of applied mechanics concerned with the behaviour of liquids and gases at rest or in motion. . FIGURE 3–2 Two basic pressure gages. Please sign in or register to post comments. Research Consultant | PowerPoint PPT presentation | free to view . FLUID MECHANICS (CHE 213) CHAPTER 2 PRESSURE AND HEAD 1 … Water, Oils, Alcohols, etc. Pressure Measurement 4. . Pressure data obtained using underwater probes were correlated with high-speed motion pictures taken of the entries. pressure of a fluid stays constant, the gauge pressure of the same fluid will vary as atmospheric pressure changes. Pressure distribution for a fluid at rest A force balance in the z direction gives: For an infinitesimal element (Dz 0) Incompressible fluid Liquids are incompressible i.e. . . Flow of Fluid and Bernoullis Equation 7. FLUID MECHANICS 150 pounds Afeet = 50 in 2 P = 3 psi P = 6 psi 300 pounds W –––– Afeet 150 lbf –––––– 50 in2 P = sn = = 3 psi= FIGURE 3–1 The normal stress (or “pressure”) on the feet of a chubby person is much greater than on the feet of a slim person. Forces Due to Static Fluid 5. . Zain Chughtai. Thus, according to the law of fluid mechanics, inside that kind of space negative pressure appears without the changes of the fluid volume. The pressure of a fluid in a pipe may be measured by using a glass U-tube containing a heavier liquid which does not mix with the fluid in the pipe. . Forces in Fluids
Chapter 23
2. The measurement of Pressure • The Barometer • Manometers • The Bourdon Gauge • Other types of Pressure Gauge Uniform Rectilinear Acceleration Pressure Variation in a variable density fluid and the Standard Atmosphere. helpful 41 1. If the pitot tube is to be used to measure the velocity of a liquid in a pipe, then we must adopt some method to know the static pressure head H. For instance, we may use a pitot tube and a vertical piezometer tube and measure the difference of the liquid levels in the two tubes. Pressure is a normal stress, and hence has dimensions of force per unit area, or {ML-1 T-2}. . . Thought Questions
Why is the electricity produced at the bottom of dams?
When you catch a deep-sea fish, why does its eyes pop-out?
Why do your ears pop on an airplane or up in the mountains?