DRAG REDUCTION USING FEMTOSECOND LASER SURFACE PROCESSING: EXPERIMENTAL SETUP

Authors

Derek Wallin, University of Nebraska - LincolnFollow
Henry Ems, University of Nebraska-LincolnFollow
Craig Zuhlke, University of Nebraska-LincolnFollow
Dennis R. Alexander, University of Nebraska-LincolnFollow
George Gogos, University of Nebraska - LincolnFollow
Sidy Ndao, University of Nebraska-LincolnFollow

Date of this Version

4-2016

Document Type

Poster

Citation

Poster, University of Nebraska-Lincoln Research Fair, Spring 2016.

Comments

Copyright (c) 2016 Derek Wallin, Henry Ems, Craig Zuhlke, Dennis Alexander, George Gogos, and Sidy Ndao

Abstract

The experimental setup for developing a system to test the drag effects of different superhydrophorbicities. This is used to revise the current Moody Chart and redefine fluid drag in a pipe.

Fluid drag reduction is important in many applications such as reducing the power requirement to pump a fluid through a channel or pipe. The Center for Electro-Optics and Functionalized Surfaces (CEFS) at the University of Nebraska – Lincoln uses a femtosecond laser to functionalize 304 stainless Steel to become superhydrophilic or superhydrophobic The Processing produces microscale and nanoscale surface roughness that when treated with siloxanes becomes superhydrophobic. Small vortices form on the surface when microstructures are introduced. This lifts the main fluid vortex away from the wall forming a slip condition at the wall.