Nano Science and Technology InstituteNano Science and Technology Institute
Nano Science and Technology Institute 2003 NSTI Nanotechnology Conference & Trade Show
Nanotech 2003
BioNano 2003
Program
Sunday
Monday
Tuesday
Wednesday
Thursday
Index of Authors
2003 Sub Sections
Proceedings
Organization
Press Room
Sponsors
Exhibitors
Venue
Organizations
NSTI Events
Subscribe
Site Map
Nanotech Proceedings
Nanotechnology Proceedings
Supporting Organizations
Supporting Organizations
Event Contact
696 San Ramon Valley Blvd., Ste. 423
Danville, CA 94526
Ph: (925) 353-5004
Fx: (925) 886-8461
E-mail:
 
 

Optimal Shape Design of Pressure-Driven Curved Micro Channels with Hydrophilic and Hydrophobic Walls

S. Lim and H. Choi
School of Mechanical and Aerospace Engineering, KR

Keywords: curved micro channel, pressure drop, optimal shape design, hydrophilic wall, hydrophobic wall

Abstract:
In microfluidic applications such as LOC, 90-deg. and 180-deg. curved channels are frequently used to supply long flow passage in a compact volume. In most curved channels, the part connecting two straight channels is made of circular walls. However, modification of the shape in the connection part may significantly reduce the pressure loss (or the pumping power) to drive the flow, which enables us to make micro devices much smaller. In this study, we perform an optimal shape design of a pressure-driven curved micro channel with minimum pressure drop using a mathematical theory. We consider two different wall types, i.e. hydrophobic and hydrophilic walls, where the slip and no-slip conditions are applied to the first and second walls, respectively. Optimal shapes are obtained from the initial circular shapes at three different bulk Reynolds numbers of 0.1, 1 and 10 for both the 90-deg. and 180-deg. curved channels. In the optimal shape, the height of the curved channel is widened according to the optimality condition, and the pressure drop is significantly reduced by about 10%~20% as compared to that with the initial circular shape.

NSTI Nanotech 2003 Conference Technical Program Abstract

 
Featured Sponsors
Nanotech Sponsors
News Headlines
NSTI Online Community
 
 

© Nano Science and Technology Institute, all rights reserved.
Terms of use | Privacy policy | Contact