Fundamentals of Fluid Dynamics - Computational Fluid and Particle Dynamics in the Human Respiratory System - page 131

Fig. 5.18 a Pipe geometry showing the surface and internal mesh. b Schematic of a laminar and
turbulent flow in a pipe flow
Fig. 5.19 Laminar and
turbulent velocity profiles in
the fully developed region
becomes very small, while although k is also reduced it is not as small leading to a
larger value of turbulence viscosity (Fig. 5.22 ).