The wavelength dependence of the high-frequency shear viscosity in a colloidal suspension of hard spheres

摘要: Using a lattice-Boltzmann method to simulate the dyanmics of colloidal suspension hard spheres, we have calculated wave-length-dependent viscosity. By extrapolating small wave vectors values for high-frequency shear viscosity, ν, up volume fractions 59%. Where comparison is possible, our are in good agreement with existing numerical, theoretical and experimental values. Examining wave-vector-dependent ν(k), find very similar behavior that found much simpler system — sphere fluid. At k (ν(k) ν) scales proportionally 3/2 only wavevector an order magnitude smaller than reciprocal particle radius can viscosity be considered essentially independent vector.