Emoticon Emoticon. Engineering Books. Very useful and rare books in all fields of Engineering. Preference :. Fundamentals of Fluid Mechanic, 8th Edition offers comprehensive topical coverage, with varied examples and problems, application of visual component of fluid mechanics, and a strong focus on effective learning.
The text enables the gradual development of confidence in problem-solving. The authors have designed their presentation to enable the gradual development of reader confidence in problem-solving.
Each important concept is introduced in easy-to-understand terms before more complicated examples are discussed. Share Email. Top clipped slide. Download Now Download Download to read offline. Fluid Mechanics. Chapter 1. Addisu Dagne Zegeye Follow. Assistant Professor. Fluid Mechanics Chapter 6. Boundary Layer Concept.
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A substance in the liquid or gas phase is referred to as a fluid. Deformation of a rubber eraser placed between two parallel plates under the influence of a shear force. Completely fill the vessel so that no free surface is formed. Therefore, liquids are usually referred to as incompressible substances.
A pressure change of just 0. Total mass, total volume V, and total momentum are some examples of extensive properties. Thus mass per unit volume of a fluid is called density. The unit of mass density in SI unit is kg per cubic meter, i. Properties of Fluids Specific Gravity. Specific gravity is also called relative density. It is dimensionless quantity and is denoted by the symbol S.
Properties of Fluids 34 Example 1. Calculate the specific weight, density and specific gravity of one liter of a liquid which weighs 7 N. Unit of Viscosity. Properties of Fluids Kinematic Viscosity. Newton's Law of Viscosity. The constant of proportionality is called the co-efficient viscosity. Mathematically, it is expressed as given by equation 1. This is due to reason that the viscous forces in a fluid are due to cohesive forces and molecular momentum transfer.
With the increase in temperature, molecular momentum transfer increases and hence viscosity increases. The relation between viscosity and temperature for liquids and gases are: 42 9- o 2 o 3- o o o 2 o 2o 10x0. Types of Fluids 1. Ideal Fluid. A fluid, which is incompressible and is having no viscosity, is known as an ideal fluid. Ideal fluid is only an imaginary fluid as all the fluids, which exist, have some viscosity.
Real fluid. A fluid, which possesses viscosity, is known as real fluid. All the fluids: in actual practice, are real fluids. Newtonian Fluid. A real fluid, in which the shear stress is directly, proportional to the rate of shear strain or velocity gradient , is known as a Newtonian fluid.
Non-Newtonian fluid. A real fluid, in which shear stress is not proportional to the rate of shear strain or velocity gradient , known as a Non-Newtonian fluid.
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