Journal or Book Title
Journal of Applied Physics
The use of miniature electromagnets for ferrofluid-actuated liquid dispensing into microfluidic channels has been investigated by numerical simulations using the finite element method and measurements of fluid displacement and flow rate. The simulations illustrate the effect of structural and geometrical parameters of single and paired solenoid coils on the magnetic force experienced by the ferrofluid. Dual solenoids were used for extended fluid displacement. Ferrofluid positioning and flow rates were controlled also by using a solenoid with an iron core. The experimental measurements of fluidflow in capillaries were used to validate the modeling calculations. The results can be used as a basis for the development of on-chip ferrofluid-based devices integrated with microfluidic architectures.
Copyright 2003 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
American Institute of Physics
He, W.; Lee, S. J.; Jiles, David C.; Schmidt, D. H.; Porter, Marc D.; and Shinar, Ruth, "Design of high-magnetic field gradient sources for controlling magnetically induced flow of ferrofluids in microfluidic systems" (2003). Ames Laboratory Publications. 149.