Experimentally verified virtual engineering for the development and optimization of spray nozzles for CIP cleaning of biotechnical plants

Water jet hits dirty stainless steel plate in the spray cleaning test rig

Project term: 01.06.2016 to 31.05.2018

Project management / project funding:
Federation of Industrial Research Associations AiF (via the Industrievereinigung für Lebensmitteltechnologie und Verpackung e. V. (IVLV)) / Federal Ministry for Economic Affairs and Energy (BMWi) 

The cleaning of processing plants in the food and pharmaceutical industries is very costly. This is due to the associated plant downtimes and the recycling/disposal of cleaning agents.

A joint project is being carried out with the Friedrich-Alexander Universität Erlangen-Nürnberg to use Virtual Engineering as a new approach for designing optimized nozzles for spray cleaning. This will allow the development of customized cleaning nozzles. Changes to the nozzle geometry can then be tested virtually in advance. This will facilitate optimization of the cleaning efficiency of the spray nozzles.

The project will focus on interactions in the nozzle-jet-surface system. The impact of the spray jet on the surface to be cleaned induces fluid dynamic effects due to momentum exchange with the surface and contaminants. The resulting forces in the layer of contamination, which can be customized for specific applications, remove the contaminants.

Mohr's circle for stress and strain analysis combined with  scientifically based equations from fluid mechanics provide the foundation for the intended Virtual Engineering of optimized low pressure spray nozzles.