- Titel
- Cleaning in a backward facing step
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-975061
- Konferenz
- Fouling and Cleaning in Food Processing 2025. Dresden, 25. bis 27. März 2025
- Quellenangabe
- Poster Pitch and Poster Session
; FCFP 2025
Herausgeber: Fraunhofer Institut für Verfahrenstechnik und Verpackung IVV
Erscheinungsort: Dresden
Erscheinungsjahr: 2025 - Erstveröffentlichung
- 2025
- DOI
- https://doi.org/10.25368/2025.108
- Abstract (EN)
- Abrupt changes in geometry such as sharp expansions, e.g. a backward facing step, are normally notrecommended under hygienic design guidelines. In some cases such features are unavoidable and it is important to understand how cleaning in such spaces differs from that in simple duct geometries. The removal of model diffusive food soil (based on instant coffee) from 304 stainless steel surfaces was studied in a rectangular duct cell at Reynolds numbers spanning the transition to turbulence (3 800-11 000). Removal was monitored visually and the evolution of the size and shape of the cleaned area as well as the local erosion rate were calculated. The cleaning behaviour observed immediately downstream of the expansions differed noticeably from that upstream, and further downstream. Insights into this are provided by 2D computational fluid dynamics simulations, and in some cases these are able to give reasonable estimates of the experimental cleaning rates.
- Freie Schlagwörter (DE)
- Rückwärtige Stufe, Stofftransport, Bewegte Grenze, Simulation, Visualisierung
- Freie Schlagwörter (EN)
- Backward facing step, mass transport, moving boundary, simulation, visualisation
- Herausgeber (Institution)
- Fraunhofer Institut für Verfahrenstechnik und Verpackung IVV, Dresden
- Sonstige beteiligte Institution
- Technische Universität Dresden, Fakultät Maschinenwesen, Institut für Naturstofftechnik
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa2-975061
- Veröffentlichungsdatum Qucosa
- 13.06.2025
- Dokumenttyp
- Konferenzbeitrag
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
