Properties of fluid
Fluid Properties Basic Concept The branch of the mechanics that deals with bodies at rest is called statics while the branch that deals with bodies in motion is called dynamics . Fluid statics → Study the behaviour of fluid at rest or at motion study fluid at Rest. Fluid kinematics → Study of Fluid at motion without considering pressure. Fluid dynamic → Study of fluid at motion with considering pressure. A substance in liquid / gas phase is referred as ‘fluid’. Distinction between a solid & a fluid is made on the basis of substance’s ability to resist an applied shear (tangential) stress that tends to change its shape. A solid can resist an applied shear by deforming its shape whereas a fluid deforms continuously under the influence of shear stress, no matter how small is its shape. In solids, stress is proportional to strain, but in fluids, stress is proportional to ‘strain rate.’ Illustration of solid and fluid deformation Referring to Fig., t...