New method predicts turbulence for non-Newtonian fluids in pipelines

A new correlation has been developed for predicting the onset of turbulence during flow of non-Newtonian pseudo-plastic fluids in trunk pipelines.The correlation is simply defined as the ratio of the viscous shear stress under turbulent conditions to the shear stress under laminar conditions. The value of the ratio equals unity in laminar conditions and greater than unity under turbulent conditions.The validity of the new criterion was verified by comparison of the values calculated from the developed correlation with those determined from Hungarian Algyo Pipeline data using the Ryan and Johnson equation. Click here to enlarge imageAn excellent agreement was obtained between the values c...

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