Multiphysics modeling of surface charce and pressure-driven elektrokinetic flow in micro/nano scale porous media
tarafından
 
Şen, Tümcan, author.

Başlık
Multiphysics modeling of surface charce and pressure-driven elektrokinetic flow in micro/nano scale porous media

Yazar
Şen, Tümcan, author.

Yazar Ek Girişi
Şen, Tümcan, author.

Fiziksel Tanımlama
xii, 99 leaves: illustrarions, charts;+ 1 computer laser optical disc.

Özet
Accurate characterization of fluid transport in micro/nano confinements is essential for numerous applications from industrial, agricultural, and medical sciences. In these applications, electrokinetic interactions dominate the fluid behavior, which causes conventional fluid dynamics to become incomplete. Specifically, near-wall hydrodynamics and liquid/solid coupling at the interface varies by electrokinetic effects. Therefore, the current study focuses on characterization of the fluid transport at various porous systems and ionic conditions. The Poisson-Nernst-Planck (PNP) equations were numerically solved coupled with the Navier-Stokes (NS) equations. Charge regulation (CR) boundary condition is employed to calculate the charging behavior of the surfaces. First, the surface charging of nano-scale systems was analyzed by considering the electric double layer (EDL) overlap and inlet/outlet effects. While EDL overlap decreased the surface charge, inlet/outlet effects presented an opposite behavior. Then, transport is characterized by calculating the hydraulic conductivity from Darcy’s law under electrokinetic and boundary slip effects. The results showed that electrokinetic effects decrease the hydraulic conductivity with increasing concentrations and decreasing confinement sizes. At slipping condition with a constant slip length applied, velocity slip developing on surface showed strong dependence on porosity and ionic conditions. For low porosities and high concentrations almost no-slip conditions were observed even at high slip lengths. Results showed that the transport in micro/nano-scale porous systems is dominated by electrokinetic interactions depending on porous system parameters and ionic conditions. Keywords: Hydraulic Conductivity, Electroviscous and Viscoelectric Effects, Velocity Slip, Electric Double Layer Overlap, Inlet/outlet Effects.

Konu Başlığı
Microfluidics.
 
Fluid dynamics.
 
Porous materials.
 
Transport theory.
 
Electrokinetics.

Yazar Ek Girişi
Barışık, Murat,

Tüzel Kişi Ek Girişi
İzmir Institute of Technology. Mechanical Engineering.

Tek Biçim Eser Adı
Thesis (Doctoral)--İzmir Institute of Technology:Mechanical Engineering.
 
İzmir Institute of Technology:Mechanical Engineering. --Thesis (Doctoral).

Elektronik Erişim
Access to Electronic Versiyon.


LibraryMateryal TürüDemirbaş NumarasıYer Numarası
IYTE LibraryTezT002312TJ853.4.M53 S47 2021