Boundary-Shear Stress in Unsteady Turbulent Pipe Flow

by M. R. Carstens, (A.M.ASCE), Prof. of Civ. Eng.; Georgia Inst. of Technology, Atlanta, Ga.,
John E. Roller, (M.ASCE), U. S. Public Health Service, Washington, D. C.,

Serial Information: Journal of the Hydraulics Division, 1959, Vol. 85, Issue 2, Pg. 67-81

Document Type: Journal Paper


In laminar flow, instantaneous mean velocity and instantaneous velocity profile are dependent upon history of motivating force or piezometric-pressure gradient; in turbulent flow, strong lateral diffusion of turbulent eddies tends to eliminate dependence of velocity distribution upon history of motion; greater degree of generalization of results appears to be possible for unsteady turbulent flow in pipe than for laminar flow.

Subject Headings: Turbulent flow | Flow distribution | Flow profiles | Laminar flow | Velocity distribution | Velocity profile | Boundary shear | Pipelines

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