國家衛生研究院 NHRI:Item 3990099045/14805

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Title:	Mathematical and computational modeling of electrohydrodynamics through a nanochannel
Authors:	Saurabh, K;Solovchuk, M
Contributors:	Institute of Biomedical Engineering and Nanomedicine
Abstract:	Fluid-ion transport through a nanochannel is studied to understand the role and impact of different physical phenomena and medium properties on the flow. Mathematically, the system is described through coupled fourth order Poisson-Nernst-Planck-Bikerman and Navier-Stokes equations. The fourth order-Poisson-Nernst-Planck-Bikerman model accounts for ionic and nonionic interactions between particles, the effect of finite size of the particles, polarization of the medium, solvation of the ions, etc. Navier-Stokes equations are modified accordingly to include both electroviscous and viscoelectric effects and the velocity slip. The governing equations are discretized using the lattice Boltzmann method. The mathematical model is validated by comparing the analytical and experimental ion activity while the numerical model is validated by comparing the analytical and numerical velocity profiles for electro-osmotic flow through a microchannel. For a pressure driven flow, the electroviscous and viscoelectric effects decrease the fluid velocity while the velocity slip enhances it. The acidity of the medium also influences the fluid velocity by altering the zeta potential and ion concentration. The finite size of the particle limits the concentration of ionic species, thus, reducing electroviscous effects. As the external concentration decreases, the impact of finite size of particles also reduces. The inhomogeneous diffusion coefficient also influences electroviscous effects as it changes the concentration distribution. The variation in external pressure does not influence the impact of steric and viscoelectric effects significantly. The maximum impact is observed for delta P = 0 (electro-osmotic flow)
Date:	2023-01-05
Relation:	AIP Advances. 2023 Jan 05;13:Article number 015205.
Link to:	http://dx.doi.org/10.1063/5.0131073
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=2158-3226&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000908392200005
Cited Times(Scopus):	https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85145882181
Appears in Collections:	[Maxim Solovchuk] Periodical Articles

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