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Lagrangian analysis of the fluid transport induced by the interaction of two co-axial co-rotating vortex rings

Journal of Hydrodynamics 2020年第6期32卷 1080-1090页

作者： Hai-yan Lin Yang Xiang Su-yang Qin Hui Xu Hong Liu J.C.wu center for aerodynamics school of aeronautics and astronauticsshanghai jiao tong universityshanghai200240china

In this paper,the fluid transport in the interaction of two co-axial co-rotating vortex rings are *** rings are generated using the piston-cylinder apparatus,and the resulting velocity fields are measured using digital particle image *** interaction process is analysed by means of vorticity contour,as well by investigation of the Lagrangian coherent structures(LCSs)defined by the ridges of the finite-time Lyapunov exponent(FTLE).Experimental results demonstrate that two types of vortex interaction are identified,namely strong and weak interactions,*** the strong interaction,the Lagrangian boundaries of the two vortex rings are merged together and form a flux window for fluid *** weak interaction,only the Lagrangian drift induced by the motion of the front vortex ring is observed and affects the Lagrangian boundary of the rear vortex ***,the fluids transported in the strong interaction carry considerable momentum but no *** contrast,there are nearly no fluxes occurring in the weak *** tracking the variations of circulation and impulse occupied by the separated regions distinguished by the LCSs,it is found that the circulation nearly has no change,but the impulse occupied by vortex core region has significant *** the strong interaction,the impulse of rear vortex ring decreases but the impulse of the front vortex ring *** on the impulse law,it is speculated that the fluid force generated by the formation of the rear vortex rings can be ***,the strong interaction between wake vortices can actually improve the propulsive efficiency of the biological systems by operating the formation of large-scale vortices.

关键词： Vortex rings Lagranagian coherent structures(LCSs) fluid transport

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Reconfiguring confined magnetic colloids with tunable fluid transport behavior

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National Science Review 2021年第5期8卷 147-157页

作者： Zhizhi Sheng Mengchuang Zhang Jing Liu Paolo Malgaretti Jianyu Li Shuli Wang Wei Lv Rongrong Zhang Yi Fan Yunmao Zhang Xinyu Chen Xu Hou State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen University Collaborative Innovation Center of Chemistry for Energy Materials Xiamen University Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteCollege of Physical Science and TechnologyXiamen University Max Planck Institute for Intelligent Systems IV Institute for Theoretical Physics University of Stuttgart Department of Mechanical Engineering McGill University Department of Biomedical Engineering McGill University Tan Kah Kee Innovation Laboratory

Collective dynamics of confined colloids are crucial in diverse scenarios such as self-assembly and phase behavior in materials science, microrobot swarms for drug delivery and microfluidic control. Yet,fine-tuning the dynamics of colloids in microscale confined spaces is still a formidable task due to the complexity of the dynamics of colloidal suspension and to the lack of methodology to probe colloids in confinement. Here, we show that the collective dynamics of confined magnetic colloids can be finely tuned by external magnetic fields. In particular, the mechanical properties of the confined colloidal suspension can be probed in real time and this strategy can be also used to tune microscale fluid transport. Our experimental and theoretical investigations reveal that the collective configuration characterized by the colloidal entropy is controlled by the colloidal concentration, confining ratio and external field strength and direction. Indeed, our results show that mechanical properties of the colloidal suspension as well as the transport of the solvent in microfluidic devices can be controlled upon tuning the entropy of the colloidal suspension. Our approach opens new avenues for the design and application of drug delivery, microfluidic logic, dynamic fluid control, chemical reaction and beyond.

关键词： confined magnetic colloids entropy pressure threshold fluid transport liquid gating technology

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Photothermally induced liquid gate with navigation control of the fluid transport

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Fundamental Research 2021年第6期1卷 800-806页

作者： Yuhang Han Yunmao Zhang Mengchuang Zhang Baiyi Chen Xinyu Chen Xu Hou State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteCollege of Physical Science and TechnologyXiamen UniversityXiamen 361005China Tan Kah Kee Innovation Laboratory Xiamen 361102China

The ability to control multiphase flows is essential for applications such as microvalves,chemical analyses,mi-croreactors,and multiphase ***,more specific controls,including the positional naviga-tion control of fluids under steady-state pressures,will improve the development of these ***,we present a fundamentally new photothermally induced liquid gating system that allows light-controlled con-tactless fluid transport and gas/liquid separations at designated locations,with seconds response times,under constant *** and theoretical calculations demonstrate the stability of our system and its novel regulation mechanism,which is based on a photothermally induced liquid-reconfigurable gate with a change in the surface/interfacial tension and Marangoni flow redistribution of the gating liquid at the illuminated *** regulation mechanism with positional navigation properties requires neither mechanical parts nor complex accessories and can further enable the miniaturization and integration of various engineering *** ap-plication demonstrations confirm the potential of this system in fields of smart valves,multiphase separations,multiphase microreactors,and beyond.

关键词： Liquid gating Navigation control Photothermally induced Marangoni flow fluid transport

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Coupled tripartite investigation of breaker fluid invasion and impact on hydrocarbon recovery in sandstone reservoirs

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Petroleum Research 2023年第3期8卷 338-349页

作者： Stella I.Eyitayo Kazeem A.Lawal Marshall C.Watson Oladoyin Kolawole Ibrahim Abdullahi Asekhame U.Yadua Oluchukwu M.Okoh Saka Matemilola Tunde Alabi Bob L.Herd Department of Petroleum Engineering Texas Tech University807 Boston AveLubbockTX79409USA FIRST Exploration and Petroleum Development Company(FIRST E&P) Nigeria John A.Reif Jr.Department of Civil and Environmental EngineeringNew Jersey Institute of TechnologyNewarkNJ07102USA Nigerian Petroleum Development Company(NPDC) Nigeria

Breaker fluids are designed to dissolve filter cakes by breaking their long-chain molecules,thereby removing solid deposits on the wellbore *** breaker fluids are not intended to infiltrate the hydrocarbon reservoir,they can invade and cause formation damage by altering sandstone reservoirs'wettability and relative *** can lead to a reduction in the overall reservoir *** study coupled tripartite methods to investigate the potential impact of breaker invasion and transport in hydrocarbon reservoirs and its multiscale effect on the performances of sandstone *** utilized experimental,analytical,and numerical methods to assess and predict the susceptibility of reservoirs to breaker fluid invasion and *** experimental and empirical investigations considered varying breaker fluid formulations to evaluate the effects of breaker fluid concentration,formation temperature,and solution gas-oil ratio(GOR)on residual-oil saturation(ROS)and oil-water relative *** adopting the ROS and relative permeability associated with the 50%v/v breaker fluid mixture,the performance of the hydrocarbon reservoir was numerically simulated under the limiting scenarios of no-invasion,moderate-invasion,and deep-invasion of breaker *** results indicate a positive correlation between breaker fluid concentration and ROS,highlighting the risks that breaker fluid invasion and deep infiltration pose to hydrocarbon ***,results show that both live-oil condition(LOC)and dead-oil condition(DOC)reservoirs are susceptible to the detrimental impacts of breaker fluid infiltration,while their invasion can reduce hydrocarbon recovery in both LOC(-6%)and DOC(-28%).The multi-scale effects on reservoir performance are more pronounced at near-wellbore and DOC than at far-field and *** from this work provide valuable insights into the complexity of breaker-fluid invasion in sandstone reservoirs and the mitigation of as

关键词： Breaker fluid fluid invasion Formation damage fluid transport Near-wellbore alteration

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Effects of Nectar Property on Compensated Dipping Behavior of Honey Bees with Damaged Tongues

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Journal of Bionic Engineering 2021年第5期18卷 1225-1234页

作者： Jingrui Wang Yu Sun Wei Zhang Yunqiang Yang Shaoze Yan Jianing Wu School of Engineering and Technology China University of Geosciences(Beijing)Beijing 100083China School of Aeronautics and Astronautics Sun Yat-Sen UniversityGuangzhou 510006China Division of Intelligent and Biomechanical Systems State Key Laboratory of TribologyDepartment of Mechanical EngineeringTsinghua UniversityBeijing 100084China

In nature,bees with damaged tongues are adapted to have a feat in collecting nectariferous sources in a large spectrum of concentrations(19%-69%)or viscosities(10^(-3)Pa·s to 10^(-1)Pa·s);however,eff ects of nectar property on compensated dipping behavior remain *** the bee tongue anatomy,high-speed videography,and mathematical models,we investigate responses of honey bees with damaged tongues to fluidic sources in various *** find that,bees with 80%damaged tongues are deprived of feeding capability and remarkably,the dipping frequency increases from 4.24 Hz to 5.08 Hz while ingesting 25%sugar water when the tongue loses 0-30%in length,while declines from 5.08 to 3.86 Hz in case of 30%damaged tongue when sucrose concentration increases from 25%to 45%.We employ the energetic compensation rate and energetic utilization rate to evaluate eff ectiveness of the compensation from the perspective of energetic *** mathematical model indicates that the energetic compensation rate turns higher in bees with less damaged tongues for ingesting dilute sugar water,demonstrating its capability of functional compensation for combined ***,the tongue-damaged bees achieve the highest energetic utilization rate when ingesting~30%sugar *** biology,the findings may shed lights on biomimetic materials and technologies that aim to compensate for geometrical degradations without regeneration.

关键词： Honey bee Damaged tongue Nectar property fluid transport Functional compensation

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Aquaporins as potential drug targets

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Acta Pharmacologica Sinica 2006年第4期27卷 395-401页

作者： Fang WANG Xue-chao FENG Yong-ming LI Hong YANG Tong-hui MA~2 Membrane Channel Research Laboratory,Northeast Normal University,Changchun 130024,China Membrane Channel Research Laboratory Northeast Normal University Changchun China

The aquaporins(AQP)are a family of integral membrane proteins that selectivelytransport water and,in some cases,small neutral solutes such as glycerol *** mammalian AQP have been molecularly identified and localized tovarious epithelial,endothelial and other *** studies of transgenicmouse models of AQP knockout,mutation,and in some cases humans with AQPmutations have demonstrated essential roles for AQP in mammalian physiologyand pathophysiology,including urinary concentrating function,exocrine glandu-lar fluid secretion,brain edema formation,regulation of intracranial and intraocu-lar pressure,skin hydration,tat metabolism,tumor angiogenesis and cell *** studies suggest that AQP may be potential drug targets for not only newdiuretic reagents for various forms of pathological water retention,but also tar-gets for novel therapy of brain edema,inflammatory disease,glaucoma,obesity,and ***,potent AQP modulators for in vivo application remain to bediscovered.

关键词： aquaporins membrane water permeability fluid transport mutation gene knockout gene function human disease drug discovery

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Imaging the Architecture of Mineral Systems and the Pathways of Ore-forming fluids across Mongolia with Magnetotellurics

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Acta Geologica Sinica(English Edition) 2024年第S1期98卷 11-13页

作者： Matthew J.COMEAU Rafael RIGAUD Erdenechimeg BATMAGNAI Shoovdor TSERENDUG Sodnomsambuu DEMBEREL Michael BECKEN Alexey KUVSHINOV Department of Geoscience&Engineering Delft University of Technology The Netherlands Institute of Geophysics ETHZürichSwitzerland Institute of Astronomy and Geophysics Mongolian Academy of SciencesUlaanbaatarMongolia Institut für Geophysik Universität MünsterGermany

In the framework of a mineral system approach,a combination of components is required to develop a mineral *** includes the whole-lithosphere architecture,which controls the transport of ore-forming fluids,and favorable tectonic and geodynamic processes,occurring at various spatial and temporal scales,that influence the genesis and evolution of ore-forming fluids(Huston et al.,2016;Groves et al.,2018;Davies et al.,2020).Knowledge of the deep structural framework can advance the understanding of the development of a mineral system and the emplacement of mineral *** geophysical exploration carried out with this aim is increasingly important for targeting new ore deposits in unexplored and underexplored regions(Dentith et al.,2018;Dentith,2019).

关键词： magnetotellurics electrical resistivity mineral exploration mineral emplacement ore fluids fluid transport

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Investigating the Whole-lithosphere Structure of a Mineral System——Pathways and Source of Ore-forming fluids Imaged with Magnetotelluric Modeling

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Acta Geologica Sinica(English Edition) 2021年第S1期95卷 73-75页

作者： Matthew J.COMEAU Michael BECKEN Alexey V.KUVSHINOV Sodnomsambuu DEMBEREL Erdenechimeg BATMAGNAI Shoovdor TSERENDUG Institut für Geophysik Universitat MünsterGermany Institute of Geophysics ETHZürichSwitzerland Institute of Astronomy and Geophysics Mongolian Academy of SciencesUlaanbaatarMongolia

Whole-lithosphere structure has direct implications for both the genesis of minerals and the locations of mineral emplacement;thus knowledge of the deep structural framework of the lithosphere can advance understandin... 详细信息

关键词： magnetotellurics electrical resistivity lithosphere structure mineral exploration metal belt oreforming fluids mineral emplacement fluid transport

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