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Electrokinetic transport of a pure polar fluid through a channel

Shin, Yun Kyung
http://rave.ohiolink.edu/etdc/view?acc_num=osu1193691023

Abstract Details

2007, Master of Science, Ohio State University, Chemistry.
The electrokinetic transport of a pure water system was investigated using continuum hydrodynamic theory. These studies are motivated by our recent numerical simulations of a non-electrolyte water system using non-equilibrium molecular dynamics (NEMD), in which we found an evidence of electric field-driven flow. To understand this observation, hydrodynamic equations that treat the rotational motion of molecules (i.e.''spin'') must be employed. The purpose of this thesis is to develop continuum theory that could explain electrokinetic flow in the absence of an electrolyte. In the bulk region, the local average polarization of the water is zero because of the random orientation of the water molecules. However, near the surface the water is anisotropic because of interactions with the walls. Application of an electric field produces a net torque density where the orientation of water molecules is anisotropic. The torque drives molecular spin which, through viscous coupling, eventually induces linear transport of the fluid. To understand the coupling between translational motion and internal rotational motion of water, we solved the hydrodynamic equations of motion for coupled linear and angular momentum. According to the analytical solution of these equations, the fluid velocity along the channel is related to the density of the torque component perpendicular to both the surface normal and the direction of flow, and a single combination of viscosity coefficients.
Sherwin Singer (Advisor)
Chemistry, Physical

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Citations

  • Shin, Y. K. (2007). Electrokinetic transport of a pure polar fluid through a channel [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1193691023

    APA Style (7th edition)

  • Shin, Yun Kyung. Electrokinetic transport of a pure polar fluid through a channel. 2007. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1193691023.

    MLA Style (8th edition)

  • Shin, Yun Kyung. "Electrokinetic transport of a pure polar fluid through a channel." Master's thesis, Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=osu1193691023

    Chicago Manual of Style (17th edition)

osu1193691023
490
© 2007, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.