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Assessment of simplified momentum equations for free surface flows through rigid porous media
Citation Link: https://doi.org/10.15480/882.4679
Publikationstyp
Journal Article
Publikationsdatum
2022-06-22
Sprache
English
Author
Enthalten in
Volume
5
Issue
2
Start Page
159
End Page
177
Citation
Experimental and Computational Multiphase Flow 5 (2): 159-177 (2023-06)
Publisher DOI
Scopus ID
2-s2.0-85132443399
Publisher
Springer
In many applications, free surface flow through rigid porous media has to be modeled. Examples refer to coastal engineering applications as well as geotechnical or biomedical applications. Albeit the frequent applications, slight inconsistencies in the formulation of the governing equations can be found in the literature. The main goal of this paper is to identify these differences and provide a quantitative assessment of different approaches. Following a review of the different formulations, simulation results obtained from three alternative formulations are compared with experimental and numerical data. Results obtained by 2D and 3D test cases indicate that the predictive differences returned by the different formulations remain small for most applications, in particular for small porous Reynolds number ReP < 5000. Thus it seems justified to select a simplified formulation that supports an efficient algorithm and coding structure in a computational fluid dynamics environment. An estimated accuracy depending on the porous Reynolds number or the mean grain diameter is given for the simplified formulation.
Schlagworte
accuracy
computational fluid dynamics (CFD)
free surface flow
porous media
simplified momentum equations
Volume of Fluid (VoF)
DDC Class
600: Technik