Insulator-based dielectrophoresis in viscous media—Simulation of particle and droplet velocity

A fouling suppression system in submerged membrane bioreactors using dielectrophoretic forces

“…The AJoule heating caused by the high electrical field strength in a DEP system is called the electrothermal effect (ETE). Due to Joule heating a temperature gradient will be formed which will cause the liquid in the system to flow, which in return will affect the movement of the particles in the system (Du et al, 2007). In a negative DEP system, the direction of fluid flow is identical to the particle motion, and thereby increasing motion velocity of particle (Du et al, 2007).…”

“…The high complexity of suspensions in MBRs may prevent the use of this process in many cases. Also the application of bare electrodes required by these processes will result in an electrochemical reaction, leading e.g., to pH shifts or even worse to toxic by-products, and increase the risks of short circuit and human electric shock (Du et al, 2007).…”

Predicting and eliminating Joule heating constraints in large dielectrophoretic IDE separators

“…A resin particle was observed to move at the subsurface of demineralized water at height h from a higher electric field region to a lower electric field region at the mid between electrodes at standard environmental temperature (T ¼298 K), presenting negative DEP effect. The temperature gradients within the liquid, which were induced by Joule heating, were shown to be proportional to the square of effective voltage (Du et al, 2007). With this voltage rising, an ETE was observed inducing a flow direction from electrode to the mid between electrodes that contributed to particles' DEP motion velocity.…”

“…The second term of Eq. (4) represents the ETE influence on fluid flow and thus, due to drag, on particle motion in the millimeter scale (Du et al, 2007). In case of n-DEP, the medium motion increases the velocity of suspended particle.…”

“…(4) was developed and experimentally verified with a millimeter scale concentric annuli electrode configuration by Du et al, in 2007. While for a millimeter scale IDE-DEP system, this model is considered to be appropriate for predicting particle motion under maximized ETE influence based on the following assumptions:…”