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Flow pulsation plays an important role for high-pressure homogenization in laboratory-scale
Högskolan Kristianstad, Fakulteten för naturvetenskap, Forskningsmiljön Food and Meals in Everyday Life (MEAL). Högskolan Kristianstad, Fakulteten för naturvetenskap, Avdelningen för mat- och måltidsvetenskap.ORCID-id: 0000-0002-0002-661X
2018 (engelsk)Inngår i: Chemical engineering research & design, ISSN 0263-8762, E-ISSN 1744-3563, Vol. 138, s. 472-481Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2018. Vol. 138, s. 472-481
Emneord [en]
High-pressure homogenization; Piston pump; Scale-up; Pulsation; Emulsification; CFD
HSV kategori
Identifikatorer
URN: urn:nbn:se:hkr:diva-18815DOI: 10.1016/j.cherd.2018.09.015ISI: 000448224800038OAI: oai:DiVA.org:hkr-18815DiVA, id: diva2:1261930
Tilgjengelig fra: 2018-11-09 Laget: 2018-11-09 Sist oppdatert: 2018-11-09bibliografisk kontrollert

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