Mass transfer in 3D-printed electrolyzers: The importance of inlet effects

Stéphane J.C. Weusten, Luc C.E.M. Murrer, Matheus T. de Groot (Corresponding author), John van der Schaaf

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)


This article investigates the effect of inlet shape, entrance length, and turbulence promoters on mass transfer by using 3D-printed electrolyzers. Our results show that the inlet design can promote turbulence and lead to an earlier transition to turbulent flow. The Reynolds number at which the transition occurs can be predicted by the ratio of the cross-sectional area of the inlet to the cross-sectional area of the electrolyzer channel. A longer entrance length results in more laminar behavior and a later transition to turbulent flow. With an entrance length of 550 mm, the inlet design did no longer affect the mass transfer performance significantly. The addition of gyroid type turbulence promoters resulted in a factor of 2 to 4 increase in mass transfer depending on inlet design, entrance length, and the type of promoter. From one configuration to another, there was a minimal variation in pressure drop (<1600 Pa).

Original languageEnglish
Article numbere17263
Number of pages12
JournalAIChE Journal
Issue number6
Publication statusPublished - 1 Jun 2021

Bibliographical note

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© 2021 The Authors. AIChE Journal published by Wiley Periodicals LLC on behalf of American Institute of Chemical Engineers.

Copyright 2021 Elsevier B.V., All rights reserved.


  • 3D printing
  • electrochemistry
  • mass transfer


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