In 2012 verloren we Jean Jacques Peters, voormalig ingenieur van het Waterbouwkundig Laboratorium (1964 tot 1979) en internationaal expert in sedimenttransport, rivierhydraulica en -morfologie. Als eerbetoon aan hem hebben we potamology (http://www.potamology.com/) gecreëerd, een virtueel gedenkarchief dat als doel heeft om zijn manier van denken en morfologische aanpak van rivierproblemen in de wereld in stand te houden en te verspreiden.
Het merendeel van z’n werk hebben we toegankelijk gemaakt via onderstaande zoekinterface.
How a flow aligned mesh improves TELEMAC model results
Smolders, S. (2022). How a flow aligned mesh improves TELEMAC model results, in: Bourban, S.E. et al.Proceedings of the XXVIIIth TELEMAC user conference, 18-19 October 2022, Paris-Saclay. pp. 45-49
In: Bourban, S.E. et al. (2022). Proceedings of the XXVIIIth TELEMAC user conference, 18-19 October 2022, Paris-Saclay. EDF Direction Recherche et Développement: Paris-Saclay. 307 pp.
In an unstructured 2D mesh the quality can be checked by means of checking the aspect ratio of the individual triangles or even the edge growth ratio. This paper wants to show how the orientation of the triangles can also affect the model results. An estimation of the longitudinal and lateral numerical diffusion is given explaining why flow alignment can be beneficial in reducing the numerical diffusion. This is demonstrated for the advection of a tracer with the rotating cone example. The paper also shows an example of a 3D hydrodynamic model of the Scheldt estuary. A comparison is made between a good quality mesh and a flow aligned mesh for the same model domain. All variables are kept equal. The influence on tidal propagation is shown. The effect on the bottom friction coefficient is shown and the potential effect on a coupled sediment transport model is discussed. The flow aligned mesh reduces the amount of lateral numerical diffusion, it reduces the artificial loss of tidal energy along the estuary, and it improves the calibration result by getting more realistic bottom friction coefficients.
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