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Analysis of coupling techniques for overset-grid finite-volume methods
Citation Link: https://doi.org/10.15480/882.2444
Publikationstyp
Doctoral Thesis
Date Issued
2019-09
Sprache
English
Author(s)
Advisor
Referee
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2019-07-09
Institut
TORE-DOI
TORE-URI
First published in
Number in series
712
Citation
Schriftenreihe Schiffbau 712: (2019)
Publisher
Schriftenreihe Schiffbau
Coupling of unstructured, overlapping 3D grids in finite-volume methods (FVM) is usually based on a local interpolation of field values, which (a) is insufficient to guarantee mass conservation and (b) requires a sufficient overlap of the wetted domain. Effects of the non-conservative coupling are analysed and the mass-dependent pressure in incompressible FVM is stabilised by global mass conservation practices. Areas with an insufficient overlap are numerically manipulated to allow the simulation of dynamic body contact. This enhanced approach is validated and applied, e.g. within the simulation of a gear pump and for contact simulations of a cylinder/sphere with a wall. The latter reveal a significant increase and a coupling of additional resistance and inertia forces.
Subjects
Computational Fluid Dynamics
Overset grids
Finite-Volume Method
Non-Conservative Inter-Grid Coupling Effects
Dynamic Body Contact
Hydrodynamic Wall-Interference Effects
DDC Class
600: Technik
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Dissertation_SvenjaSchubert_mD.pdf
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