Physics Assignment Help >> Fluid Mechanics

Fluid mechanics is concerned with the study of properties of fluids and study of forces on fluid. The term fluids include gases, liquids and plasmas. The area of fluid mechanics can be divided into fluid kinematics, fluid dynamics, fluid motion, effect of forces on fluid motion and fluid statics.

Fluid mechanics is the field of physics that deals with the fluids and the forces acting on them. Here fluids include liquids, gases, and plasmas. This field can be divided into two parts. Fluid Kinematics which is the study of fluid motion, 2nd one is Fluid Dynamics which is the study of the effect of forces on fluid motion. Fluid dynamics can be further classified into Fluid Statics and Fluid Kinetics. Fluid statics is related to the study of fluids at rest whereas fluid kinetics is the study of fluids in motion. It is a branch of continuum mechanics, it models matter from a macroscopic viewpoint rather than from a microscopic viewpoint, in other words, it is a subject which models matter without using the information that it is made out of atoms. Fluid dynamics, an important part of fluid mechanics is an active field of research with many unsolved or partly solved problems. By using numerical methods, typically using computers these problems of fluid mechanics can be solved. For example, a modern discipline, known as Computational Fluid Dynamics (CFD), is devoted to this approach to solve various complex fluid mechanics problems. You can also take advantage of particle image velocimetry which is an experimental method for analyzing and visualizing fluid flow. Different scientists associated with fluid mechanics gave us various important concepts about this subject such as Archimedes investigated fluid statics and buoyancy and formulated his famous law known now as the Archimedes' Principle, then Isaac Newton for viscosity, Evangelista Torricelli invented barometer, and Blaise Pascal gave hydrostatics’ principle etc. Like other mathematical model of the real world, fluid mechanics also makes some basic assumptions about the materials being studied. These are namely conservation of mass, law of conservation of energy and conservation of momentum. It is often useful at subsonic conditions to assume a fluid incompressible in which the density of the fluid does not change. Various liquids can often be modelled as incompressible fluids, whereas gases cannot be. Besides these, fluids are assumed to obey the continuum assumption according to which fluids are considered to be continuous rather than discrete. Consequently, properties such as pressure, temperature, density and velocity are taken to be well-defined at infinitesimally small points, and assumed to vary continuously from one point to another.

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Related Topics: Fluid Mechanics, Fluid Statics, Fluid Dynamics, Surface Tension, Fluid Kinematics, Fluid Motion, Forces on Fluid