UCARE: Undergraduate Creative Activities & Research Experiences


Date of this Version


Document Type



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


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


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.