Logo der Universität Wien

Complex Fluids - Drag reduction

This morning when you washed your hands or flushed your toilet water was transported in pipes at velocities giving rise to turbulence. Turbulence generation is intrinsic to all pipe systems showing velocities above a threshold and devastates up to 80% of the energy input which is required to sustain the fluid flow. This effect is called drag. A measure of this loss is the pressure drop along the pipe. Adding 1 polymer macromolecule, consisting of 1 million Carbon atoms, per 10 billion water molecules, allows to reduce the turbulence induced pressure drop by about 50%. We like to understand how this works and to develop better, longer living and more sustainable molecules to reduce the drag in pipe systems.  


Dr. Hans Werner Müller
Research Associate


University of Vienna | Universitätsring 1 | 1010 Vienna | T +43-1-4277-0