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Low-Dimensional Components of Flows With Large Free/Moving-Surface Motion

Journal Article · · Journal of Offshore Mechanics and Arctic Engineering
DOI:https://doi.org/10.1115/1.4041016· OSTI ID:1613400
 [1];  [2]
  1. Metrum Research Group, Tariffville, CT 06081 e-mail: 
  2. School of Civil and Construction Engineering, Oregon State University, Corvallis, OR 97331 e-mail: 
+ Show Author Affiliations

Flow systems with highly nonlinear free/moving surface motion are common in engineering applications, such as wave impact and fluid-structure interaction (FSI) problems. In order to reveal the dynamics of such flows, as well as provide a reduced-order modeling (ROM) for large-scale applications, we propose a proper orthogonal decomposition (POD) technique that couples the velocity flow field and the level-set function field, as well as a proper normalization for the snapshots data so that the low-dimensional components of the flow can be retrieved with a priori knowledge of equal distribution of the total variance between velocity and level-set function data. Through numerical examples of a sloshing problem and a water entry problem, we show that the low-dimensional components obtained provide an efficient and accurate approximation of the flow field. Moreover, we show that the velocity contour and orbits projected on the space of the reduced basis greatly facilitate understanding of the intrinsic dynamics of the flow systems.

Research Organization:
Oregon State Univ., Corvallis, OR (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
DOE Contract Number:
EE0006816
OSTI ID:
1613400
Journal Information:
Journal of Offshore Mechanics and Arctic Engineering, Vol. 141, Issue 2; ISSN 0892-7219
Publisher:
ASME
Country of Publication:
United States
Language:
English

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