Adaptative fluids: rheology and light transmission control

We present two new effects related to intelligent fluids. The first one is the control of the transmission of a laser beam by using the change of turbidity of an electrorheological fluid in the presence of an electric field. The second one is the control of the aggregation of non magnetic particles by a magnetic field in order to change the viscosity of the fluid. This fluid is made of non magnetic particles in suspension in a high magnetization ferrofluid.