Fluid Flow Concepts Flow Classification Ideal fluid flow Frictionless(zero viscosity) ● Incompressible Can be solved mathematically Real fluid flow Shear stress develops where there is velocity gradient Fluid in contact with wall has zero velocity Pipe wall Ideal fluid Real fluid Non-uniform velocity Shear stress niform velocity eXIstS Zero shear stress Fluid close to wall has zero velocityFluid Flow Concepts Flow Classification : Ideal Fluid Flow • Frictionless (zero viscosity) • Incompressible • Can be solved mathematically Real Fluid Flow • Shear stress develops where there is velocity gradient • Fluid in contact with wall has zero velocity Pipe Wall Ideal Fluid : Uniform velocity Zero shear stress Real Fluid : Non-uniform velocity Shear stress exists Fluid close to wall has zero velocity