Response time in electro-rheological fluids as a function of dielectric constant and viscosity

Response times of a number of Electro-Rheological Fluids (ERFʹs) produced with silica particles and various liquid phases with different viscosities and dielectric constants, were optically measured through a specifically-designed set up. The analysis of the data shows that for all the experimental results, t (delay time) is proportional to 1/Ea, where E is the applied electric field and a an adjustable parameter.