Abstract :
[en] This paper proposes the notion of model adaptivity for fluid flow modelling, where the under-
lying model (the governing equations) is adaptively changed in space and time. Specifically,
this work introduces a hybrid and adaptive coupling of a 3D bulk fluid flow model with a
2D thin film flow model. As a result, this work extends the applicability of existing thin film
flow models to complex scenarios where, for example, bulk flow develops into thin films after
striking a surface. At each location in space and time, the proposed framework automatically
decides whether a 3D model or a 2D model must be applied. Using a meshless approach for
both 3D and 2D models, at each particle, the decision to apply a 2D or 3D model is based
on the user-prescribed resolution and a local principal component analysis. When a particle
needs to be changed from a 3D model to 2D, or vice versa, the discretization is changed, and
all relevant data mapping is done on-the-fly. Appropriate two-way coupling conditions and
mass conservation considerations between the 3D and 2D models are also developed. Numerical
results show that this model adaptive framework shows higher flexibility and compares well
against finely resolved 3D simulations. In an actual application scenario, a 3 factor speed up is
obtained, while maintaining the accuracy of the solution.
Disciplines :
Mechanical engineering
Engineering, computing & technology: Multidisciplinary, general & others
Aerospace & aeronautics engineering
Mathematics
Funding text :
Pratik Suchde would like to acknowledge partial support from the European Union’s Horizon 2020 research and innovation
programme under the Marie Skłodowska-Curie Actions grant agreement No. 892761 ‘‘SURFING’’. Pratik Suchde would also like to
acknowledge funding from the Institute of Advanced Studies, University of Luxembourg, under the AUDACITY programme grant
‘‘ADONIS’’.
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