Laminar-turbulent transition in a bayonet tube

Abstract This paper provides the details of a numerical study of the bayonet tube during the laminar-turbulent transition. Attention is focused on the frictional characteristics of the tube. The results constitute a systematic investigation of the effect of the principal parameters on hydraulic resistance represented by an Euler number. Specifically discussed are the effects of fluid properties, tube length, and inner tube width. The data are interpreted in terms of the origin and spread of turbulence, as revealed by the turbulence intensity contours in the k - ϵ model. Comparisons are made with available experimental data.