Flows of viscoplastic fluids through sudden, conical axisymmetric contraction are studied. A finite-element numerical simulation is performed using a biviscosity approximation. Inertia is neglected. The effects of yield stress are analyzed, as are those of shear-thinning, contraction angle, and contraction ratio. The pressure losses, detailed structure of the flow such as the rigid static and moving zones, and the vortex are given in relation to these parameters. Consistent comparisons are also made with the experimental results obtained in the laboratory.
Numerical Simulation of Viscoplastic Fluid Flows Through an Axisymmetric Contraction
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division June 8, 2001; revised manuscript received March 20, 2002. Associate Editor: G. Marshall.
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Jay, P., Magnin, A., and Piau, J. M. (August 19, 2002). "Numerical Simulation of Viscoplastic Fluid Flows Through an Axisymmetric Contraction ." ASME. J. Fluids Eng. September 2002; 124(3): 700–705. https://doi.org/10.1115/1.1486472
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