Title: Modelling of multi-species thin film flows based on the transport of ions including conjugate heat transfer applied to corrosion testing

Authors: Uwe Janoske; Steffen Seifritz

Addresses: Faculty of Mechanical and Safety Engineering, University of Wuppertal, Wuppertal, Germany ' Cooperate Research, Robert Bosch GmbH, Renningen, Germany

Abstract: Corrosion tests are standardised test procedures where specimen is subjected to different climates in test chambers with defined test cycles. The cycles are a complex scenario of spraying, drying and condensation phases. Aqueous sprays with different salts lead to liquid films and corrosion processes on the specimen. As there are various kinds of salts present which will deposit based on the local concentration of the ions, the stoichiometry and the solubility, the conventional modelling with a given number of species is extremely difficult. Therefore, the modelling approach for handling species was changed to the modelling of the transport of ions in the film including condensation and evaporation. The verification is reported on a simple U-shaped specimen whereas a more complex specimen was used for the validation with experimental results on the basis of a standardised test cycle in corrosion testing.

Keywords: multi-species? computational fluid dynamics? CFD? fluid films? droplets? dissolution? condensation? evaporation? conjugate heat transfer? corrosion? testing.

DOI: 10.1504/PCFD.2024.140892

Progress in Computational Fluid Dynamics, An International Journal, 2024 Vol.24 No.5, pp.255 - 265

Received: 27 Oct 2022
Accepted: 13 Apr 2023
Published online: 03 Sep 2024 *

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