Ans: Fluids for which the viscosity increases with the rate of deformation (du/dy) are called shear thickening or dilatant fluids.

These are the non-Newtonian fluids i.e. the relationship between shear stress and shear strain rate is **non-linear**.

These two videos show examples and demonstrations of the non-newtonian fluids

1. __Newtonian vs. Dilatant fluid__