Below you find a selection of customer projects showcasing typical problems we are dealing with. Some projects come with downloadable project folders that are linked in the respective sections. Additionally there are some links to demo videos and detailed information about the general solution approach.


Optimisation of a slurry mixing process for
pharmaceutics production

Example for optimization of mixing vessels.In cooperation with Octapharma, the world's biggest privately owned producer of pharmaceuticals based on human plasma, Rheologic simulates slurry mixing processes.

Starting from a high resolution 3D-Scan of different mixers and tank geometries unsteady multiphase simulations of slurries are performed. Mixer parameters such as build, rotational speed and position inside the tank are optimised to achieve an intensification of the process.


Evaluation of saving potential for cooling power

T-Systems is a global player in ICT providing IT-infrastructure to many well known companies. In its datacenter in Vienna, Austria where HSG-Zander (global parent company: Bilfinger) is in charge of facility management, in cooperation with Schneider Electric energy savings potential was identified in existing server rooms by Rheologic.

After temperature and flow measurements in the server room actual cooling power of the CRAHs was calculated and an energy balance with fine granularity was created. Based on the measurements and the energy balance those parts of the server room where identified where optimisation is possible and feasible. Previously unquantified saving potentials for cooling energy and for CRAH efficiency were quantified and payback of retrofitting evaluated.

Finally a number of recommendations were given which improve the current cooling efficiency. The recommendations range from very simple measures (very simple retrofits, administrative changes) to complex changes of installations. We would like to thank Schneider Electric, HSG-Zander and T-Systems for the constructive and professional participation in the project.

OeNB (Austrian National Bank)

Simulation and implementation of emergency cooling operation
in a server room of OeNB


Engineering of emergency operation in a separated server-room. One part is mostly free standing racks cooled by redundant CRAHs. The other part is housed racks using in-row cool loops. Correct ventilation layout in the separation wall between the two parts of the server room enables stable cooling for emergency operation. Ventilation starts automatically if the cool loops fail.


In a virtual geometry the required flow rates for the fans in the separation wall was calculated to achieve a stable maximum end temperature in case the in-row cool loops fail to operate correctly.


Application of CFD-Simulations for engineering of emergency cooling operations has shown to have many benefits compared to classic approaches:

  • Exact forecasts: exact planning of construction work
  • Retro-fit: costly constructions are minimized
  • Dynamic problems can be solved as well (eg. time to emergency temperature limit)
  • Payback of capital expenses is known in advance: minimal investment risks

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UBA (Austrian Environmental Agency)

Saved more than 30% of cooling power in the server room of the Umweltbundesamt (UBA)

Using only simple improvements (without any CAPEX) cooling power was reduced by 30%. Using current average electricity costs the yearly savings exceed 10.000 EUR.

Energy consumption for summer and winter in the graph are quite similar due to facility restrictions; it is not possible to control outside-in air flow.

OeNB (Austrian National Bank)

Cooling of Critical Hot-Spots in a Server Room of the Austrian National Bank

In cooperation with the IT-Operations department of Austrian National Bank (OeNB) critical parts of the infrastructure were measured and simulated to ensure reliable cooling and operation of the installed equipment. After implementation of the proposed measures no overheating of the critical components were observed.

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UBA (Umweltbundesamt) (Environment Agency Austria)

Air-flow in a server room was measured, thermally balanced and improvements for cooling were recommended.