First instability of the flow of shear-thinning and shear-thickening fluids past a circular cylinder

@inproceedings{Lashgari2012FirstIO,
title={First instability of the flow of shear-thinning and shear-thickening fluids past a circular cylinder},
author={Iman Lashgari and Jan O Pralits and FLAVIO GIANNETTI and Luca Brandt},
year={2012}
}

The first bifurcation and the instability mechanisms of shear-thinning and shearthickening fluids flowing past a circular cylinder are studied using linear theory and numerical simulations. Structural sensitivity analysis based on the idea of a "wavemaker" is performed to identify the core of the instability. The shear-dependent viscosity is modeled by the Carreau model where the rheological parameters, the power-index and the material time constant, are chosen in the range 0.4 6 n 6 1.75 and 0… CONTINUE READING