Abstract
The flow characteristics in the bellmouth region of a circular pipe have been numerically studied for Reynolds numbers (Re) ranging from 1000 to 4000. Until now, the axial velocity has been assumed to be uniform at the bellmouth outlet. The calculation results, however, reveal that it develops a profile somewhat towards the Poiseuille’s parabolic profile. Moreover, a feasible reason for the increase in critical Reynolds number when using bellmouths was identified, i.e., if the bellmouth region is replaced by the pipe one, it was observed that the equivalent Re decreases from the original Re value.
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References
Kanda, H. and Oshima, K., Pressure Distribution on a Cross Section in the Entrance Flow Region of a Circular Pipe. 1998 ASME Fluids Engineering Division Summer Meeting, FEDSM98-5005, 1998.
Rivas, M. A. and Shapiro, A. H., On the Theory of Discharge Coefficient for Rounded-Entrance Flowmeters and Venturis. Trans. ASME, April, pp.489–497, 1956.
Shapiro, A. H., Siegel, R. and Kline, S. J., Friction Factor in the Laminar Entry Region of a Smooth Tube. Proc. 2nd. Natl. Congr. Appl. Mech., ASME, pp.733–741, 1954.
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© 1998 Springer-Verlag
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Kanda, H., Oshima, K. (1998). Numerical study of effects of a bellmouth on the entrance pipe flow. In: Bruneau, CH. (eds) Sixteenth International Conference on Numerical Methods in Fluid Dynamics. Lecture Notes in Physics, vol 515. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0106563
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DOI: https://doi.org/10.1007/BFb0106563
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