Effect of Pipe Roughness on Pressure Losses of Newtonian Fluids in Concentric Annulus

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Celal Bayar Üniversitesi Fen Bilimleri Dergisi
Volume:12 Issue:3
Effect of Pipe Roughness on Pressure Losses of Newtonian Fluids in Concentric Annulus

Effect of Pipe Roughness on Pressure Losses of Newtonian Fluids in Concentric Annulus

Authors : Mehmet Sorgun, Deniz Gülşen Haşıloğlu

Pages : 413-417

Doi:10.18466/cbayarfbe.280604

View : 31 | Download : 11

Publication Date : 2016-12-26

Article Type : Other Papers

Abstract :Pressure loss is one of the important parameters in hydraulic engineering. Especially for the large Reynolds Number, relative roughness has a significant effect on pressure losses in annulus. In this study, water flowing through rough and smooth concentric annulus for turbulent flow is modeled using Computational Fluid Dynamics (CFD). CFD software based on the finite element method predictions of pressure losses are compared with experimental data obtained from the literature. The model predicts measured frictional pressure gradient with an error less than ±15% in all cases. Furthermore, pipe roughness influences on frictional pressure losses of water are also examined for various pipe roughness values, inner and outer diameters and Reynolds Number. The analysis results revealed that as the diameter ratio increases, the influence of roughness on pressure gradient increases.
Keywords : Concentric annulus, CFD, roughness, pressure loss, water

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