Article
Construction & Building Technology
Yang Liu, Wuxuan Pan, Zhengwei Long
Summary: The paper utilized an inverse design method to optimize ventilation parameters for a room with stratum ventilation, aiming to reduce the risk of COVID-19 transmission by controlling droplet nuclei concentration in the breathing zone. Results showed that the POD-based inverse design method is more than 90% faster than traditional trial-and-error methods and can significantly reduce droplet nuclei concentration.
SUSTAINABLE CITIES AND SOCIETY
(2021)
Article
Construction & Building Technology
Yun Wei, Tengfei (Tim) Zhang, Huibin Jin
Summary: A model is proposed in this study to predict the transport of airborne gaseous pollutants in a fixed airflow pattern quickly by applying proper orthogonal decomposition and the Markov chain method. The model reduces computing time significantly.
BUILDING AND ENVIRONMENT
(2023)
Article
Mechanics
Behrad Asgari, Ehsan Amani
Summary: This research focuses on the development of an improved spray-wall interaction model in an Eulerian-Lagrangian framework and demonstrates its superiority in predicting spray penetration radius and height. The new model is able to significantly reduce overall error compared to other models and accurately predict detailed spray, gas, and droplet statistics.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Acoustics
L. V. Pereira, T. G. Ritto
Summary: This study combines POD and SOD to identify rub-impact faults in gas turbines, showing that both methods can effectively recognize pattern changes. The proposed methodology can monitor the evolution of modal component patterns and support engineers in decision-making.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Marine
Zihao Wang, Guiyong Zhang, Huakun Huang, Hao Xu, Tiezhi Sun
Summary: This paper proposes the use of Joint POD (JPOD) as a promising fluid mechanics analysis tool to extract multi-variable features of cavitation flow. JPOD increases the reconstruction error slightly but strengthens the correlations between multivariate variables in the flow field. The successful combination of joint representation and POD algorithm demonstrates its potential as an optimization and standardization method for traditional modal decomposition algorithms, with broad application prospects in the field of modal decomposition.
Article
Multidisciplinary Sciences
A. B. Albidah, W. Brevis, V. Fedun, I. Ballai, D. B. Jess, M. Stangalini, J. Higham, G. Verth
Summary: The study demonstrates the successful identification of sausage and kink modes in a sunspot umbra using a combination of POD and DMD techniques, providing new insights into solar observations.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2021)
Article
Acoustics
Michael A. Marshall
Summary: This study aims to clarify the conditions under which the POMs of a linear, undamped, and unforced mechanical system converge to the system's LVMs. It provides a rigorous proof of convergence that shows increasing both the sampling rate and the duration of the sampling is necessary, rather than just increasing the sampling rate.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Mechanics
Marc Olbrich, Markus Baer, Kilian Oberleithner, Sonja Schmelter
Summary: This study investigates different cases of slug flow in horizontal pipes to find statistical characteristics of the slugs in time and space, including slug frequencies, averaged slug body length, and an energy representation. The use of snapshot proper orthogonal decomposition with an additional mode coupling algorithm provides accurate and reliable characterization of the slug flow patterns.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Engineering, Mechanical
Wei Zhou, Y. F. Xu
Summary: This study investigates the use of Proper Orthogonal Modes (POMs) of guided wavefields for damage identification in beam-like structures. The continuous wavelet transform is employed to enhance local anomalies and suppress global trends, and an adaptive truncation technique is used to determine significant POMs for damage identification. Numerical and experimental investigations verify the accuracy and noise-robustness of the proposed method for identifying the location and extent of damage in beam-like structures.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Computer Science, Interdisciplinary Applications
Akhil Nekkanti, Oliver T. Schmidt
Summary: An algorithm based on spectral proper orthogonal decomposition (SPOD) is developed to reconstruct flow data in compromised or missing regions. The algorithm utilizes the temporal and spatial correlation of the SPOD modes to fill in the gaps. The method is demonstrated on two examples and achieves higher data recovery rates compared to established methods.
JOURNAL OF COMPUTATIONAL PHYSICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Elizabeth H. Krath, Forrest L. Carpenter, Paul G. A. Cizmas, David A. Johnston
Summary: This study introduces a novel, more efficient reduced-order model for compressible flows based on proper orthogonal decomposition (POD). By using specific volume instead of density, the coefficients of the system of ODEs in the reduced-order model were pre-computed. Various methods were used to enhance ODE solver stability. Validation was done for two cases, showing a speedup exceeding four orders of magnitude compared to the full-order model.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Mathematics, Applied
Xi Li, Yan Luo, Minfu Feng
Summary: In this paper, an efficient proper orthogonal decomposition based reduced-order model (POD-ROM) for nonstationary Stokes equations is proposed. The new scheme combines the classical projection method with POD technique, resulting in low computational costs and improved efficiency.
JOURNAL OF SCIENTIFIC COMPUTING
(2022)
Article
Computer Science, Interdisciplinary Applications
Michael A. Meehan, Sam Simons-Wellin, Peter E. Hamlington
Summary: This study explores a new method for performing Proper Orthogonal Decomposition (POD) on Adaptive Mesh Refinement (AMR) data, and proposes an algorithm that eliminates redundant operations, improving computational efficiency.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Mechanics
Shijun Chu, Chao Xia, Hanfeng Wang, Yajun Fan, Zhigang Yang
Summary: The study reveals that the seal-vibrissa-shaped cylinder has a more stable three-dimensional separation wake, longer vortex formation length, and weaker vortex strength compared to a circular cylinder at a Reynolds number of 20000. The mean drag and fluctuation of the lift coefficient of the seal-vibrissa-shaped cylinder are significantly reduced, and SPOD can extract four typical vortex shedding patterns.
Article
Mechanics
J. Verdoya, M. Dellacasagrande, D. Lengani, D. Simoni, M. Ubaldi
Summary: This study applied an extended proper orthogonal decomposition (E-POD) to multi-plane particle image velocimetry measurements of laminar separation bubbles evolution. It revealed correlations between main flow features and breakup events, as well as characterized the coherent structures using streamwise and spanwise autocorrelation functions.
Article
Computer Science, Interdisciplinary Applications
S. K. Jung, R. S. Myong
COMPUTERS & FLUIDS
(2013)
Article
Engineering, Aerospace
Young Rok Yang, Sung Ki Jung, Tae Hwan Cho, Rho Shin Myong
JOURNAL OF SPACECRAFT AND ROCKETS
(2012)
Article
Mathematics, Applied
SungKi Jung, R. S. Myong
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2020)
Article
Engineering, Aerospace
SungKi Jung, L. Prince Raj, A. Rahimi, H. Jeong, R. S. Myong
AEROSPACE SCIENCE AND TECHNOLOGY
(2020)
Article
Engineering, Aerospace
SungKi Jung, Won Choi, Luiz S. Martins-Filho, Fernando Madeira
JOURNAL OF AEROSPACE TECHNOLOGY AND MANAGEMENT
(2016)
Article
Engineering, Aerospace
SungKi Jung
JOURNAL OF AEROSPACE TECHNOLOGY AND MANAGEMENT
(2015)