VISCOUS FLOW IN HELICAL PIPES WITH NARROW ANNULAR CROSS SECTION
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Abstract: The Navier-Stokes equations are established for a nonorthognal coordinate-system based on tensor analysis. The zeroth-, the first- and the second-order (t = 0) analytic solutions are obtained for fully developed flow in helical pipes with narrow annular cross section using a perturbation method. It is found that there is a secondary flow on the annular cross section.
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Key words:
- tensor application /
- flow in helical pipes /
- secondary flow /
- perturbation solution
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