Heat and Flow Technology I. ÓBUDA UNIVERSITY Heat and Flow Technology I. Use only inside Dr. Ferenc Szlivka Professor Dr. Szlivka: Heat and Flow Technology I_8

Friction fluid flow 8. Chapter

Friction fluid flow Real fluid flow along a wall Ideal flow along a wall Real fluid flow along a wall

Friction flow in a channel

Newton’s viscous law Dynamic viscosity Kinematics viscosity

Different fluids Power function fluid Bingham fluid

Navier-Stokes equation Motion equation with friction terms Continuity equation

Solution of Navier-Stokes equation in tube Equilibrium of a cylinder

Solution of Navier-Stokes equation in tube

Solution of Navier-Stokes equation in tube „l" is the length , with Dp’the pressure loss