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Experimental study of the pumping action of helical flow |
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| Authors: | M R Petrichenko and N S Khar’kov |
| Institution: | (1) Department of Chemical and Process Engineering, University of Sheffield, Newcastle Street, Sheffield, S1 3JD, UK;(2) Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Narodni 3, Czech Republic |
| Abstract: | A decrease in hydraulic friction coefficient Σ (Darcy number) is found in the range of smooth tubes. The maximum possible decrease in Σ is observed at Φ = 0.08 for numbers Re D = V x D / ν in the range Re Dx = (5.8−6.6) × 104. |
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