Electroviscous Effects in Stationary Solid Phase Suspensions

Flowing through porous media is a matter of interest in different research fields such as medicine, engineering and science. The spontaneous appearance ionic distribution at the solid liquid interface gives place to reduction flow rate, which generally named electroviscous effect. However, this should be differentiated two more specific effects, primary effect due distortion clouds, secondary overlapping clouds. Theoretical experimental works have not always been clearly conducted order separate both effects. Instead, they globally grouped. purpose review revise theoretical bibliography on stationary phase suspensions (porous plugs, membranes, microchannels, capillaries). main conclusions brief revision are: (i) when clouds are relatively small, it possible accept that only cause for apparent increase viscosity forced relative phase; (ii) although theory predicts maximum variation overall vs size cloud, has experimentally observed but properly reasoned its existence depends salt type; (iii) necessary justify why, if fluid non-Newtonian, electrokinetic parameters dominate characteristics high pressure gradients, rheological decisive generated by low gradients.