Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session A32: Electrokinetic Transport I
8:00 AM–9:57 AM,
Sunday, November 19, 2023
Room: 158AB
Chair: Siddhartha Das, University of Maryland
Abstract: A32.00003 : Electrokinetic cell powered by osmotic gradients: an analytic survey for asymmetric wall potentials and hydrophobic surfaces*
8:26 AM–8:39 AM
Presenter:
Guillermo Sanchez
(Universidad Nacional Autonoma de Mexico UNAM)
Authors:
Guillermo Sanchez
(Universidad Nacional Autonoma de Mexico UNAM)
Federico Mendez
(Universidad Nacional Autonoma de Mexico UNAM)
Edgar Ramos
(Universidad Nacional Autonoma de Mexico)
This work presents a theoretical study in power generation, exploiting streaming potentials produced by an asymmetric membrane which in turn prompts a flux inside a microchannel made of two flat parallel surfaces. The driving force in this electrokinetic battery is the osmotic gradient at both sides of the membrane. The model uses the Debye-Hückel approximation together with the appropriate asymmetric boundary conditions in both slips and potentials on the surfaces. The main variables of interest such as the dimensionless horizontal velocity component, the pressure field, and the average streaming potential were estimated.
*G. Sánchez acknowledges the support of a Post-Doctoral fellowship from the "Consejo Nacional de Ciencia y Tecnología”, México.Edgar Ramos and Guillermo Sánchez acknowledge the support from DGAPA PAPIIT-UNAM under contract number IA100623.
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