Abstract
Drag reduction caused by surfactant solutions is considered. Surfactant contains threadlike micelles. At a critical shear rate the shear viscosity suddenly increases in this so-called shear-induced state (SIS). At high shear rates the increased shear viscosity gradually decreases. In this paper, two-dimensional numerical simulation in the surfactant solution containing threadlike micelles by the finite difference lattice Boltzmann method is reported. As a result, we formed SIS and checked the shear viscosity increasing at a critical shear rate and the increased shear viscosity decreasing at high shear rates.
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