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2D flow simulation with chimera grids

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dc.contributor.author Δήμας, Θεόδωρος el
dc.contributor.author Dimas, Theodoros en
dc.date.accessioned 2021-01-08T07:49:06Z
dc.date.available 2021-01-08T07:49:06Z
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/52742
dc.identifier.uri http://dx.doi.org/10.26240/heal.ntua.20440
dc.rights Default License
dc.subject Αναδιπλούμενα πλέγματα el
dc.subject Chimera πλέγματα el
dc.subject Πλήρης συντηρητική μορφή μεθόδου Chimera el
dc.subject Διεπαφή κοινού συνόρου αναδιπλούμενων πλεγμάτων el
dc.subject Ένωση πλεγμάτων el
dc.subject Fully conservative chimera method en
dc.subject Chimera grids en
dc.subject Multizonal interface en
dc.subject Overset grids en
dc.subject Union of meshes en
dc.title 2D flow simulation with chimera grids en
dc.contributor.department Laboratory of Aerodynamics el
heal.type masterThesis
heal.classification Computational Mechanics el
heal.language en
heal.access free
heal.recordProvider ntua el
heal.publicationDate 2020-11-10
heal.abstract In this study, a zonal interface generation algorithm was developed and implemented in a cell-centered, finite volume solver in order to simulate a flow over an airfoil which is embedded in a Cartesian grid. Chimera or overset grids acquire the flexibility of having a simple topology mesh over complex individual geometric features and then combined, they create a global simulation. While the classic Chimera grid approach requires interpolations of the values in the overlapping regions of the grids, in this study an alternative method was followed: The two meshes are patched in their common boundary creating one grid, which takes into consideration the advantages of the patched grid scheme and the overset grid scheme and therefore a new zonal interface boundary scheme is created. The biggest advantage of this method is that it ensures global conservation. The algorithm can unite structured-structured grids and structured-unstructured as well. Furthermore, the zonal interface generation algorithm was created in a way that the expansion of the algorithm to moving Chimera grids is feasible. Finally, the algorithm was successfully implemented in the Eulerian Solver MaPFlow and was tested for a steady state 2D flow simulation of a mesh over an airfoil which is embedded in a Cartesian grid. el
heal.advisorName Βουτσινάς, Σπυρίδων el
heal.committeeMemberName Ριζιώτης, Βασίλειος el
heal.committeeMemberName Μπούρης, Δημήτριος el
heal.academicPublisher Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Μηχανολόγων Μηχανικών el
heal.academicPublisherID ntua
heal.numberOfPages 55 σ. el
heal.fullTextAvailability false


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