FM Lecture 2 # Fluid Mechanics classification

1.4 Fluid Mechanics It is the branch of fluid sciences wherein we study i. Physical behaviour of fluid and the laws governing this behaviour. ii. Action of forces of fluids and the resulting flow pattern. 1.4.1 Fluid mechanics has three branches as discussed below a. Fluid statics: - It is a branch of fluid mechanics wherein we study mechanics of fluids at rest (i.e. there is no relative motion between two layers of fluid). In this case fluid elements are free from shearing stresses. b. Fluid kinematics: - It is a branch of fluid mechanics wherein we study the motion (i.e. displacement, velocity and acceleration) of fluid elements without considering' the forces or energy causing the motion. c. Fluid dynamics: - It is the branch of fluid mechanics wherein we study the relation between velocity, acceleration and forces which are exerted upon the moving fluids. 1.5 Concept of continuum of fluid · Fluid flow problems are analysed by using the concept that treats fluids as a continuous media i.e. all voids, cavities, microscopic which occur in the fluids are ignored. · Fluid properties are treated to be same at a point and identical in all directions from a specified point. · A continuous and homogeneous fluid medium is called continuum. · From the continuum view point, the overall properties and behavior of fluids can be studied without regard of its atomic and molecular structure. #Mumbai #University #Deepak_gupta #Mechanical #Engineering