Rheological behavior of a concentrated suspension: A solid rocket fuel simulant

The rheological behavior of a very concentrated suspension (76.5 vol %), which serves as a widely used solid rocket fuel simulant, was characterized employing both torsional and capillary flows. No comprehensive studies of the rheology of concentrated suspensions have been carried out previously at such a high solids content. The suspension exhibited shear thinning over the apparent shear rate range of 30–3000 s−1. Significant slip at the wall was observed in both torsional and capillary flows with the slip velocity increasing from about 0.001 mm/s at a shear stress of 4 Pa to as high as 60 mm/s at 100 kPa. A flow visualization technique was applied for the first time to determine the wall slip velocities in torsional flow directly, to also provide the true deformation rate and feedback on yielding. The contribution of the slip of the suspension at the wall to the volumetric flow rate in capillary flow was found to increase with decreasing shear stress, giving rise to plug flow at sufficiently low shear s...

[1]  D. Kalyon,et al.  Effects of air entrainment on the rheology of concentrated suspensions during continuous processing , 1991 .

[2]  Dilhan M. Kalyon,et al.  Slip Effects in Capillary and Parallel Disk Torsional Flows of Highly Filled Suspensions , 1989 .

[3]  S. Onogi,et al.  Non‐Linear Behavior of Viscoelastic Materials. I. Disperse Systems of Polystyrene Solution and Carbon Black , 1970 .

[4]  James L White,et al.  An experimental study of the influence of carbon black on the rheological properties of a polystyrene melt , 1979 .

[5]  Andreas Acrivos,et al.  Shear‐Induced Structure in a Concentrated Suspension of Solid Spheres , 1980 .

[6]  Saad A. Khan,et al.  Melt Rheology of Filled Thermoplastics , 1987 .

[7]  A. Acrivos,et al.  The shear-induced migration of particles in concentrated suspensions , 1987, Journal of Fluid Mechanics.

[8]  A. Magnin,et al.  Cone-and-plate rheometry of yield stress fluids. Study of an aqueous gel , 1990 .

[9]  A. B. Metzner.  Rheology of Suspensions in Polymeric Liquids , 1985 .

[10]  D. Kalyon,et al.  EXTRUSION AND LUBRICATION FLOWS OF VISCOPLASTIC FLUIDS WITH WALL SLIP , 1993 .

[11]  R. Powell,et al.  RHEOLOGY OF SOLID PROPELLANT DISPERSIONS , 1991 .

[12]  R. Hoffman.  Rheology of Concentrated Latexes and Dispersions , 1983 .

[13]  R. Farris,et al.  Prediction of the Viscosity of Multimodal Suspensions from Unimodal Viscosity Data , 1968 .

[14]  Lisa Ann Mondy,et al.  Experimental observations of particle migration in concentrated suspensions: Couette flow , 1991 .

[15]  G. B. Froishteter,et al.  The laminar flow of plastic disperse systems in circular tubes , 1980 .

[16]  V. Vand.  Viscosity of solutions and suspensions; theory. , 1948, The Journal of physical and colloid chemistry.

[17]  David J. Jeffrey,et al.  The Rheological Properties of Suspensions of Rigid Particles , 1976 .

[18]  H. N. Stein,et al.  Time‐dependent behavior and wall slip in concentrated shear thickening dispersions , 1991 .

[19]  M. Mooney.  Explicit Formulas for Slip and Fluidity , 1931 .

[20]  A. B. Metzner,et al.  Flow Behavior of Concentrated (Dilatant) Suspensions , 1958 .

[21]  Howard A. Barnes,et al.  The yield stress myth? , 1985 .

[22]  A. Yoshimura,et al.  Wall Slip Corrections for Couette and Parallel Disk Viscometers , 1988 .

[23]  L. E. Nielsen,et al.  Viscosity of Dispersed and Aggregated Suspensions of Spheres , 1968 .

[24]  D. Kalyon,et al.  Dilatancy of concentrated suspensions with Newtonian matrices , 1991 .

[25]  A. B. Metzner,et al.  Apparent Slip Flow of Polymer Solutions , 1985 .

[26]  V. Vand.  Viscosity of solutions and suspensions; experimental determination of the viscosity-concentration function of spherical suspensions. , 1948, The Journal of physical and colloid chemistry.

[27]  R. Hoffman.  Discontinuous and dilatant viscosity behavior in concentrated suspensions III. Necessary conditions for their occurrence in viscometric flows , 1982 .

[28]  D. Kalyon,et al.  Flow instabilities in capillary flow of concentrated suspensions , 1994 .

[29]  Andrea W. Chow,et al.  NMR flow imaging of fluids and solid suspensions in Poiseuille flow , 1991 .

[30]  A. Mutel,et al.  Rheological Properties of Suspensions in Newtonian and Non-Newtonian Fluids , 1985 .

[31]  S. Tsai,et al.  Effects of Liquid Polarity on Rheology of Noncolloidal Suspensions , 1987 .

[32]  M. Keentok.  The measurement of the yield stress of liquids , 1982 .

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

[34]  J. Mewis,et al.  Rheology of concentrated dispersions , 1976 .

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

[36]  K. Okada,et al.  Heterogeneous Behavior after Yielding of Solid Suspensions , 1986 .

[37]  H. A. Barnes,et al.  Shear‐Thickening (“Dilatancy”) in Suspensions of Nonaggregating Solid Particles Dispersed in Newtonian Liquids , 1989 .

[38]  C. Gogos,et al.  Mat formation and unstable flows of highly filled suspensions in capillaries and continuous processors , 1989 .

[39]  Q. D. Nguyen,et al.  Measuring the Flow Properties of Yield Stress Fluids , 1992 .

[40]  J. Piau,et al.  Shear rheometry of fluids with a yield stress , 1987 .