论文信息 - Entry and exit flows of Bingham fluids

Entry and exit flows of Bingham fluids

Entry and exit flows through extrusion dies are studied numerical by for Bingham fluids exhibiting a yield stress. A constitutive equation proposed by Papanastasiou is used, which applies everywhere in the flow field in both yielded and practically unyielded regions. The emphasis is on determining the extent and shape of unyielded/yielded regions along with the extrudate swell (contraction) for planar and axisymmetric dies. The results for pressure are used to determine the excess pressure losses that give rise to entrance, exit, and the total end (or Bagley) correction.

Evan Mitsoulis | E. Mitsoulis | N. Markatos | N. C. Markatos | S. S. Abdali

[1] Roger I. Tanner,et al. Numerical study of the Bingham squeeze film problem , 1984 .

[2] David K. Gartling,et al. A numerical simulation of a plastic fluid in a parallel-plate plastometer , 1984 .

[3] R. Tanner,et al. The end correction for power-law fluids in the capillary rheometer , 1978 .

[4] F. A. Mirza,et al. Numerical Simulation of Entry and Exit Flows in Slit Dies , 1984 .

[5] E. Mitsoulis. Extrudate Swell in Double‐Layer Flows , 1986 .

[6] John Tsamopoulos,et al. Creeping motion of a sphere through a Bingham plastic , 1985, Journal of Fluid Mechanics.

[7] E. C. Bingham. Fluidity And Plasticity , 1922 .

[8] J. F. Milthorpe,et al. On the shearing zone around rotating vanes in plastic liquids: theory and experiment , 1985 .

[9] Morton M. Denn,et al. Flow of bingham fluids in complex geometries , 1984 .

[10] E. Mitsoulis. The numerical simulation of boger fluids: A viscometric approximation approach , 1986 .

[11] R. Tanner. A new inelastic theory of extrudate swell , 1980 .

[12] R. Byron Bird,et al. The Rheology and Flow of Viscoplastic Materials , 1983 .

[13] J. O. Wilkes,et al. Laminar jets of Bingham-plastic liquids , 1990 .

[14] D. V. Boger,et al. Direct Yield Stress Measurement with the Vane Method , 1985 .

[15] C. R. Beverly,et al. Numerical analysis of extrudate swell in viscoelastic materials with yield stress , 1989 .