Slip behavior during pressure driven flow of Laponite suspension

We investigate pressure driven pipe flow of Laponite suspension, as a model thixotropic fluid. The tendency the suspension to age is controlled by addition sodium chloride salt vary ionic strength. use syringe pump prescribe and observe that steady state obtained. Unusually, drop required maintain constant rate decreases with an increase in rate, qualitative contrast expectation for Poiseuille flow. demonstrate experimental results obtained varying concentration, geometry (pipe diameter length) can be collapsed onto single universal curve rationalized invoking slip at tube walls. exhibits plug-like flow, yielding Our suggest length varies linearly inversely diameter.