Fluidic Oscillator

interFoam, multiphase, interesting phenomenon, fluid logic, object functions


Tobias once had an interesting discussion with his former colleague, Dr. Jan Bohacek, at the Montanuniversität Leoben. There they discussed about windscreens and fluidic oscillator systems. Sometimes, fluid dynamics without any moving parts do have exciting phenomena.

Computational Fluid Dynamics gives insight into exciting phenomena

The following example can be used to explain different and complex fluid phenomena. The operation of the fluidic oscillator uses geometrical properties to start an oscillating fluid stream. The fluidic oscillator is used for windscreen cleaning devices on cars or trucks because no motion of mechanical parts is needed. The frequency is related to the size of the channels and the mass flux going through the fluidic oscillator. The case itself is meshed by using the in-house mesher, namely snappyHexMesh, and is further modified for 2D purposes. Additionally, a passive scalar transport equation is built on the fly by using the object function libraries. A source term is added by using the fvOptions options.

Image: Fluidic Oscillator CFD analysis at start
Image: The numerical mesh
Image: Fluidic Oscillator CFD analysis after a few seconds

Published under the GNU General Public License 3

Over the last ten years, Tobias tried to publish a wide range of different materials related to OpenFOAM® and CFD. You know it much better than he does if the content is worth to be supported. If you want to thank Tobias for the work he did, feel free to tell the community your opinion about the work Tobias Holzmann is doing or you can email your thoughts directly to »community@Holzmann-cfd.com«. Keep in mind that the work that was done here took much time, and it is not self-evident that Tobias Holzmann shares all his work, knowledge, and attitude for free and keep the data up to date. Hosting the material, updating the data, and keeping up interesting work for the community does take much time and also money. Supporting Tobias is greatly welcomed and can be done easily by donating any amount you would like to give to support his projects shared on his website.

Support the work of Tobias Holzmann

The available OpenFOAM® training cases are tested and built for different OpenFOAM® versions (not distributions) on a Linux machine. During the tests, only the OpenFOAM Foundation version of OpenFOAM® was used. Furthermore, the following software packages are required for most of the training cases: Salome®, ParaView®, and for optimization tasks, one also needs the open-source software DAKOTA®. The OpenFOAM® cases might work with the ESI version of OpenFOAM® but it is not supported. For the OpenFOAM® extend project, the training cases will probably not work as the code diverged too much. Additionally, there is no support for Windows-based and MAC-based OpenFOAM® versions.


This offering is not approved or endorsed by OpenCFD Limited, producer and distributor of the OpenFOAM software via www.openfoam.com, and owner of the OPENFOAM® and OpenCFD® trade marks

Share the work on Your social network

Tobias would be grateful if you share his work on your social network in order to keep the OpenFOAM® community up to date. Furthermore, sharing the work will avoid that people investigate into topics, that are already prepared for your study such as the examples provided by Tobias Holzmann.

Released on 04.01.2021 — Downloads:
Released on 04.01.2021 — Downloads:
Released on 04.01.2021 — Downloads:
Released on 04.01.2021 — Downloads:
Released on 04.01.2021 — Downloads:
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