Xinan Liu

University of Maryland, College Park

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James H. Duncan

University of Maryland, College Park

Quanan Zheng

University of Maryland, College Park

Ren Liu

Robert Bosch (India)

Guirui Yu

Institute of Geographic Sciences and Natural Resources Research

Ren Liu

Jiangnan University

Huang Peiji

First Institute of Oceanography

Charles Q. Jia

University of Toronto

Bolun Wang

Max-Planck-Institut für Kohlenforschung

Mark A. Sletten

United States Naval Research Laboratory

Benjamin Holt

Jet Propulsion Laboratory

Cooperative Institutions

Chinese Academy of Sciences

University of Maryland, College Park

University of Chinese Academy of Sciences

Xidian University

Tsinghua University

Ministry of Natural Resources

First Institute of Oceanography

China Southern Power Grid (China)

Chongqing University

Ministry of Education of the People's Republic of China

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On the study of radar backscattering of ocean surface in response to rainfall

Bulletin of the American Physical Society (2013)

Xinan Liu Quanan Zheng Ren Liu James H. Duncan

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Deep‐water seamount wakes on SEASAT SAR image in the Gulf Stream region

Geophysical Research Letters (2012)

Quanan Zheng Benjamin Holt Xiaofeng Li Xinan Liu Qing Zhao

A SEASAT synthetic aperture radar (SAR) image taken over the Gulf Stream region shows streak‐like patterns. The physics of their generation and interaction with the Gulf Stream are disputed. This study seeks a convincing interpretation for the SAR imagery patterns. Bathymetric maps show that the sea floor area beneath the streaks is the northeast Hoyt Hills, where isolated seamounts with the heights of 20 to 140 m above the background sea floor are distributed. All the SAR imagery streaks originate from these seamounts and extend downstream. Thus the SAR imagery streaks are interpreted as surface roughness imprints of the seamount wakes. Hydrostatic flow dynamics of the generation of wakes on the lee side of a solid obstacle is used to explain the generation mechanism and internal structure of the seamount wakes. The analysis indicates that boundary conditions and hydrodynamic conditions are favorable for the generation and vertical propagation of the seamount wakes to the upper layer.

Seamount

Gulf Stream

10.1029/2012gl052661

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Citations (22)

The Infrared Signature of Breaking Waves

APS Division of Fluid Dynamics Meeting Abstracts (2003)

Geoffrey M. Smith Xinan Liu Nathalie Behn James H. Duncan

Signature (topology)

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A radar backscattering mechanism of ocean surface in response to rainfall

Bulletin of the American Physical Society (2012)

Xinan Liu Quanan Zheng Ren Liu James H. Duncan

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The effects of surfactants on spilling breaking waves

Nature (2003)

Xinan Liu James H. Duncan

Capillary wave

Wave tank

10.1038/nature01357

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Citations (61)

Numerical sandpile model for simulating algal bloom behaviors in fluctuating band along riversides of the Three-Gorges valley

Acta Scientiae Circumstantiae (2006)

Xinan Liu

According to the current decade local monitoring data such as total concentrations of nitrogen and phosphorus, water temperatures, flow velocities and light illuminations, a numerical sandpile model based on self-organized criticality theory was constructed to reveal inherent dynamic mechanism of algal blooms and describe complex evolution process of alga growth in an open environmental system of water fluctuating band along riversides of the Three-Gorges valley. With the frequency-scale power law relationship, the avalanche behavior of numerical sandpile has been charactered as a criterion to estimate algal bloom and predict the scales, the self-organized criticality of the algal bloom system also verified through finite size scaling analysis, and all results were consistent with the monitoring data very well. Simulating computation showed if there existed power law relationship in the sandpile model, the corresponding water fluctuating band system would appear algal bloom pollution, and absolute values of exponent of the power law were all directly proportional to scales of algal bloom.

Abelian sandpile model

Bloom

Exponent

Three gorges

Self-organized Criticality

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Effect of Cultural Measures on Nutrient Contellts in Rice Plants with Erect Panicles

Pedosphere (1999)

Bolun Wang Xinan Liu Guirui Yu Shui Wang Zou Bangji

Panicle

Transplanting

Rice plant

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Effects of wind on the generation of secondary droplets and ring waves due to drop impact onto a water surface

APS (2019)

Xinan Liu Chang Liu James H. Duncan Air-Sea interaction Team

Drop Impact

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Experimental Study of Drop Impact on Deep-Water Surface in the Presence of Wind

Journal of Physical Oceanography (2018)

Xinan Liu

Abstract The effects of wind on the impact of a single water drop on a deep-water surface are studied experimentally in a wind tunnel. Experiments are performed by varying impacting drop diameters, ranging from 2.5 to 4.1 mm and wind speeds up to 6.7 m s −1 . The sequence of splashing events that occurred during drop impacts is recorded with a backlit, cinematic shadowgraph technique. The experimental results show that for low wind speeds, an asymmetrical crown forms on the leeward of the periphery of the colliding region after the drop hits the water surface, while a wave swell forms on the windward. Secondary droplets are generated from the crown rim. For high wind speeds with large drop diameters, ligaments are generated from the crown rim on the leeward of the drop impact site. The ligaments grow, coalesce, and fragment into secondary droplets. It is found that both the drag force and surface tension play important roles in the evolution process of the ligaments. The nondimensional K number ( K = WeOh −0.4 , where We is the Webber number and Oh is the Ohnesorge number) is used to describe the splashing-deposition limit of drop impact. The threshold value of this K number changes with the wind velocity and/or drop impact angle.

Drop Impact

Spinning drop method

Shadowgraph

Weber number

Swell

10.1175/jpo-d-17-0172.1

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Citations (14)

Nutritive equilibrium in rice plant populations for high yield

Pedosphere (1999)

Bolun Wang Xinan Liu Guirui Yu Su Zhengshu Wang Su

Transplanting