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  4. Assessment of uncertainty due to wave reflections in experiments via numerical flow simulations
 
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Assessment of uncertainty due to wave reflections in experiments via numerical flow simulations

Publikationstyp
Conference Paper
Date Issued
2015-01
Sprache
English
Author(s)
Peric, Robinson  
Abdel-Maksoud, Moustafa  orcid-logo
Institut
Fluiddynamik und Schiffstheorie M-8  
TORE-URI
http://hdl.handle.net/11420/7074
Volume
2015-January
Start Page
530
End Page
537
Citation
International Offshore and Polar Engineering Conference: 530-537 (2015-01)
Contribution to Conference
International Offshore and Polar Engineering Conference 2015  
Scopus ID
2-s2.0-84944680890
Reflections at the wave-maker and tank boundaries can be a dire problem in wave tank experiments. Often, such reflections cannot be avoided. The present paper proposes an approach to quantify this influence via numerical flow simulations. It is straight-forward to redo the actual experiment "virtually" in a flow simulation, featuring full reflections as present in the wave tank experiment. It is shown that reflections at the wave-maker and domain boundaries can be nearly eliminated by applying appropriate boundary conditions in combination with domain-internal wave generation approaches. This is demonstrated for the case of a boat subjected to regular deep water waves from starboard side. Flow simulations based on the Euler equations are performed for a realistic model scale setup, in a similar manner as experiments in a narrow wave tank would be performed. Subsequently, the simulation is repeated in such a way, that undesired wave reflections at both the domain boundaries and the wave-maker are minimized. From the comparison, it is possible to separately assess the influence of wave reflections at the wave-maker as well as at the wave tank boundaries.
Subjects
Euler equations
Mass sources
Wave generation
Wave reflection
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