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Flow pulsation plays an important role for high-pressure homogenization in laboratory-scale
Kristianstad University, Faculty of Natural Science, Research Environment Food and Meals in Everyday Life (MEAL). Kristianstad University, Faculty of Natural Science, Avdelningen för mat- och måltidsvetenskap.ORCID iD: 0000-0002-0002-661X
2018 (English)In: Chemical engineering research & design, ISSN 0263-8762, E-ISSN 1744-3563, Vol. 138, p. 472-481Article in journal (Refereed) Published
Abstract [en]

Most experimental and numerical investigations of high-pressure homogenizers assume that the valve is fed with a constant flowrate. However, technical homogenizers use piston pumps with either 3 or 5 pistons (production- and pilot-scale machines) or a single piston (laboratory-scale machines). This results in flow pulsation. It is still unknown to what extent this influences valve hydrodynamics. Moreover, it is unknown if the difference in the number of pistons has implications for scale-up. This study uses a piston pump model and CFD simulations to elaborate on these questions. It is concluded that the constant flow assumption is justifiable for homogenizers using piston pumps with 3 or 5 pistons (pilot-and production-scale), but that homogenizers run with a single piston (i.e. laboratory-scale machines) will obtain a substantially different flow field. Most notably, the jet extending from the single-piston homogenizer gap will become highly unsteady and smaller drop sizes are expected (when keeping all other settings constant). This adds to previous findings suggesting substantial fundamental differences between laboratory- and production-scale homogenizers. (C) 2018 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2018. Vol. 138, p. 472-481
Keywords [en]
High-pressure homogenization; Piston pump; Scale-up; Pulsation; Emulsification; CFD
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hkr:diva-18815DOI: 10.1016/j.cherd.2018.09.015ISI: 000448224800038OAI: oai:DiVA.org:hkr-18815DiVA, id: diva2:1261930
Available from: 2018-11-09 Created: 2018-11-09 Last updated: 2018-11-09Bibliographically approved

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Håkansson, Andreas
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Research Environment Food and Meals in Everyday Life (MEAL)Avdelningen för mat- och måltidsvetenskap
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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