Johannes Kepler University Linz
Integrated Circuit and System Design
Univ.-Prof. Dr. Robert Wille
Altenberger Straße 69 | SCP4 0331
4040 Linz | Austria
Tel: +43 732 2468 4739

Map and directions to JKU

Gradient Generator

This page provides the Gradient Generator: a tool allowing to automatically create designs for tree-shaped concentration gradient generators. Such devices are used to mix two fluids with different concentration values and provide various mixtures of these fluids (i.e., mixtures with certain concentration values) at corresponding outlets. The concentration values at the outlets as well as the number of outlets can be specified by the user. Besides this, the user only has to specify basic input parameters, such as the channel width, fluid viscosity, flow rates etc. Based on this parameters a design of a tree-shaped concentration gradient generator is automatically generated and can then be downloaded as Scalable Vector Graphics (SVG) file.

Details of the approach are summarized in the paper entitled "Automatic Design of Microfluidic Gradient Generators".

In case of questions/problems, please contact us through

If you use the tool for your research, we would be thankful if you referred to it by citing the following publication:

   title={Automatic Design of Microfluidic Gradient Generators},
   author={Gerold Fink and Tina Mitteramskogler and Marcus Hintermüller and Bernhard Jakoby and Robert Wille,
   journal={IEEE Acess},

More on our work on microfluidics is summarized in this page.