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Assessment of a subgrid-scale model for convection-dominated mass transfer for initial transient rise of a bubble
  • +2
  • Andre Weiner,
  • Claire Claassen,
  • Irian Hierck,
  • J.A.M. (Hans) Kuipers,
  • Maike Baltussen
Andre Weiner
TU Braunschweig University

Corresponding Author:a.weiner@tu-braunschweig.de

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Claire Claassen
Technische Universiteit Eindhoven
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Irian Hierck
Eindhoven University of Technology
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J.A.M. (Hans) Kuipers
Eindhoven University of Technology
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Maike Baltussen
Technische Universiteit Eindhoven
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Abstract

The mass transfer between a rising bubble and the surrounding liquid is mainly determined by an extremely thin layer of dissolved gas forming at the liquid side of the gas-liquid interface. Resolving this concentration boundary layer in numerical simulations is computationally expensive. Subgrid-scale models mitigate the resolution requirements enormously and allow approximating the mass transfer in industrially relevant flow conditions with high accuracy. However, the development and validation of such models is difficult as only integral mass transfer data for steady-state conditions are available. Therefore, it is difficult to assess the validity of the sub-grid models in transient conditions. In this contribution, we compare the local and global mass transfer of an improved subgrid-scale model for rising bubbles (Re = 72-569 and Sc = 10^2-10^4) to a single-phase simulation approach, which maps the two-phase flow field to a highly-resolved mesh comprising only the liquid phase.
24 Aug 2021Submitted to AIChE Journal
25 Aug 2021Submission Checks Completed
25 Aug 2021Assigned to Editor
05 Sep 2021Reviewer(s) Assigned
04 Nov 2021Editorial Decision: Revise Major
19 Dec 20211st Revision Received
26 Dec 2021Submission Checks Completed
26 Dec 2021Assigned to Editor
30 Dec 2021Reviewer(s) Assigned
31 Jan 2022Editorial Decision: Accept
24 Feb 2022Published in AIChE Journal. 10.1002/aic.17641