2D flow simulation with chimera grids

Δήμας, Θεόδωρος; Dimas, Theodoros

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