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- W2069778816 abstract "The incompressible fully developed laminar flow in a helically duct of square cross section is studied expressing the governing equations in terms of an orthogonal coordinate system. Numerical results are obtained with the described continuity, vorticity, and pressure (CVP) numerical method using a colocation grid for all variables. Since there are not approximations, the interaction effects of curvature, torsion and axial pressure gradient on the velocity components and the friction factor are presented. The results show that the torsion deforms substantially the symmetry of the two centrifugal vortices of the secondary flow, which for large values of torsion combined with small curvature tend to one vortex covering the whole cross section. The friction factor decreases for torsion in the range 0 to 0.1 and increases as the torsion increases further, a behavior which is more profound as the Dean number increases. Our results are stable for the calculated Dean numbers." @default.
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- W2069778816 date "2005-01-01" @default.
- W2069778816 modified "2023-09-24" @default.
- W2069778816 title "Numerical Procedure for the Laminar Developed Flow in a Helical Square Duct" @default.
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- W2069778816 doi "https://doi.org/10.1115/1.1852483" @default.
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