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- Title
Simulation-based optimization and experimental analysis of the cleanability of macro-structured, 3D-printed pipe surfaces with protrusions.
- Authors
Hanisch, Tobias; Joppa, Matthias; Eisenrauch, Vincent; Jacob, Sebastian; Mauermann, Marc
- Abstract
The hygienic design of machinery in the food industry mainly follows feature-specific, empirical guidelines, To achieve a real optimization of the geometry with respect to cleaning, the case-specific interaction between flow, soil and substrate must be considered. A recent approach, based on computational fluid dynamics, considers the diversity of cleaning tasks and allows for a generalized evaluation of cleaning performance. In this approach, the cleaning behavior is investigated qualitatively as a function of the relevant cleaning mechanisms and relative to a reference case. Here it is applied to optimize the cleanability of protrusion-structured pipes regarding film-like soils. Spherical and teardrop-shaped protrusions are studied and an optimized teardrop-shape is developed based on the results of flow simulations. In addition, the macroscopic and microbial cleaning behavior of the macro-structured pipes are investigated experimentally. Therefore, they are additively manufactured using stainless steel. In the given experimental setup, which mimics the cleanability test of the European Hygienic Engineering Design Group, the teardrop-protrusion with optimized geometry outperforms an unstructured pipe in terms of fouling mitigation as well as the macroscopic and microbial cleaning performance. The study demonstrates that CFD simulations are well suited for the qualitative evaluation of cleanability during the design phase.
- Subjects
FLOW simulations; MACHINE design; STAINLESS steel; FOOD processing machinery
- Publication
Food & Bioproducts Processing: Transactions of the Institution of Chemical Engineers Part C, 2022, Vol 136, p106
- ISSN
0960-3085
- Publication type
Article
- DOI
10.1016/j.fbp.2022.09.012