An Ohmic Model for Electrokinetic Flows of Binary Asymmetric Electrolytes
- Creators
- Persat, Alexandre
- Santiago, Juan G.
Abstract
The transport of electrolytes in electric fields is a ubiquitous phenomenon commonly harnessed in microfluidics. A classic leaky dielectric model for flow generated by electric fields accurately predicts electrohydrodynamic transport phenomenon, but is valid for millimeter-scale and larger flows and at relatively low ionic strength. Here, we derive and use a modified version of this model to sub-millimeter scales more relevant to microfluidics, where diffusive transport of charged species becomes non-negligible. We formulate a general equation set, the modified Ohmic model, applicable to the transport of binary, asymmetric electrolytes. We leverage this model to describe a variety of microfluidic electrokinetic systems, including DC electroosmosis, alternating current electrokinetics (ACEK) and induced-charge electroosmosis (ICEO), thus highlighting some unifying principles of these flows.
Additional Information
© 2016 Elsevier Ltd. Received 24 February 2016, Revised 31 May 2016, Accepted 1 June 2016, Available online 10 June 2016.Additional details
- Eprint ID
- 68505
- Resolver ID
- CaltechAUTHORS:20160620-075040929
- Created
-
2016-06-20Created from EPrint's datestamp field
- Updated
-
2021-11-11Created from EPrint's last_modified field