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Droplet spectra and high-speed wind tunnel evaluation of air induction nozzles

Qing TANG, Liping CHEN, Ruirui ZHANG, Min XU, Gang XU, Tongchuan YI, Bin ZHANG

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 4,   Pages 442-454 doi: 10.15302/J-FASE-2017169

Abstract: Droplet size spectra were measured for four air induction nozzles (IDK-120-01, IDK-120-02, IDK-120-03affected by the quadratic of wind speed. v , v and v of the droplets were all proportional to the orifice sizequadratically related to wind speed, and was not markedly influenced by the spray pressure and orifice sizeHowever, the effect of the orifice size on the %<200 mm could not be ignored.

Keywords: air induction nozzle     wind tunnel     aerial spray     droplet size spectra    

Comparison of droplet distributions from fluidic and impact sprinklers

Xingye ZHU,Shouqi YUAN,Junping LIU,Xingfa LIU

Frontiers of Agricultural Science and Engineering 2015, Volume 2, Issue 1,   Pages 53-59 doi: 10.15302/J-FASE-2015049

Abstract: To adapt to the trend toward low-energy precision irrigation, the droplet distributions for two new prototypeA laser precipitation monitor was used to measure the droplet distributions.Droplet size and velocity distributions were tested under four operating pressures for nozzles 1.5 mA new empirical equation is proposed for determination of droplet size for OS and FS, which is sufficientlyBasic statistics for droplet size and velocity were performed on data obtained by the photographic methods

Keywords: outside signal sprinkler     fluidic sprinkler     impact sprinkler     sprinkler irrigation     droplet size     droplet    

Online recognition of drainage type based on UV-vis spectra and derivative neural network algorithm

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1430-6

Abstract:

• UV-vis absorption analyzer was applied in drainage type online recognition.

Keywords: Drainage online recognition     UV-vis spectra     Derivative spectrum     Convolutional neural network    

A CFD study of the transport and fate of airborne droplets in a ventilated office: The role of dropletdroplet interactions

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 3, doi: 10.1007/s11783-021-1465-8

Abstract:

• Coulomb and Lennard−Jones forces were considered for droplet interactions

Keywords: Droplet interactions     Aerosols     Colloids     CFD     Transport     Fate    

Development of a seismic design method based on response spectra for building structures

ZHOU Xiyuan, YU Ruifang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 129-141 doi: 10.1007/s11709-007-0014-2

Abstract: The assumption and problem of the mode-superposition response spectrum method in seismic design code is discussed based on a brief review of the development of the seismic design method for building structures. The scope of application for the classical damping theory is analyzed and the necessity of the research on mode-superposition method for non-classical damping is presented. The progresses on the mode superposition response spectrum theory are discussed. This includes: 1) the complex mode superposition method (in real form) for the non-classically damped linear system and the general calculation formula for the application of code; 2) the complex complete quadratic combination (CCQC) method for the non-classically damped linear system, which is based on the same assumptions as in deducing the complete quadratic combination (CQC) method which is popularly used in seismic design codes of many countries; 3) the complex complete quadratic combination with three components (CCQC3) method, which is a generalization of the CCQC method to the case of multi-components and multiple-support seismic excitations and deducing corresponding method; 4) the approach for calculation of seismic response of the non-classically damped system with overcritical damping and the calculation method of seismic response for the linear system with multiple eigenvalues; 5) the time-dependent CCQC (t) algorithm considering nonstationary earthquake ground motion; 6) an applied and effective method to solve the low order complex vector basis for the large linear non-classically damped system, which can be expediently used in practice to avoid the unknown errors coming from the forced uncoupling method; 7) bringing forward the concept of partial quadratic combination in order to reduce the calculation amount of CQC and CCQC methods, and studying the primary estimation-criterion. The reasonability and applicable scope of these methods are also briefly discussed in this paper.

Keywords: generalization     classical damping     mode-superposition response     calculation formula     damping theory    

Analysis of the radiation heat transfer process of phase change for a liquid droplet radiator in space

Jinying YIN, Linhua LIU

Frontiers in Energy 2011, Volume 5, Issue 2,   Pages 166-173 doi: 10.1007/s11708-010-0105-y

Abstract: optimization of a space power system is greatly affected by the radiation heat transfer in a liquid dropletThe Mie theory is used to calculate the radiative properties of the droplet bed, whereas the effectiveMultiple factors affect heat flux in the LDR, such as size distribution, flow velocity, phase changeCalculations show that once size distribution is neglected, the relative error increases significantlySize distribution has a remarkably strong effect on heat flux when the flow velocity of the working fluid

Keywords: radiation heat transfer     particle polydispersion     liquid droplet radiator     phase change    

Modeling and simulation of droplet translocation and fission by electrowetting-on-dielectrics (EWOD)

Nathan HOWELL, Weihua LI

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 376-388 doi: 10.1007/s11465-010-0104-z

Abstract: This paper discusses methods of microfluidic droplet actuation by means of electrowetting-on-dielectricsThe two operations in focus here are droplet translocation (moving) and droplet fission (splitting),size, surface properties (Teflon coated), and geometry of the system are kept constant for each operationThe droplet position and mean kinetic energy of the droplet are also investigated and compared to otherworks, proving the dynamics of a droplet motion found here.

Keywords: electrowetting-on-dielectrics (EWOD)     electrowetting     microfluidics     droplet translocation     droplet fission    

Dynamical analysis of droplet impact spreading on solid substrate

Zhaomiao LIU, Huamin LIU, Xin LIU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 308-315 doi: 10.1007/s11465-010-0020-2

Abstract: This paper investigates the impact spreading of a droplet on a solid substrate using numerical simulationThe process of droplet spreading is described, the analysis of low speed and high speed droplet spreading, and more than one droplet spreading simultaneously is performed.The pressure, velocity, and spreading factor during the droplet spreading are reported.The impact speed impacts on the spreading factors in high speed droplet spreading.

Keywords: droplet     impact spreading     numerical simulation    

Synthesis of crystals and particles by crystallization and polymerization in droplet-based microfluidic

Jingtao WANG, Jin ZHANG, Junjie HAN,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 1,   Pages 26-36 doi: 10.1007/s11705-009-0292-4

Abstract: The recent advances in crystallization and polymerization assisted by droplet-based microfluidics toDroplet-based microfluidic devices are powerful tools to execute some precise controls and operationsto produce the polymer particles (including Janus particles) with precise control over their sizes, size

Keywords: core-shell     monodisperse     nucleation     Microfluidic     different technical    

Numerical study of droplet dynamics impinging onto steel plate covered with scale layer

Jan BOHá?EK, Ale? HORáK

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 389-398 doi: 10.1007/s11465-010-0108-8

Abstract: This paper describes the dynamics of high-speed impact between the compressible water droplet and theConsidering a high droplet impact speed (100–300 ms ), inferential extremely short time interval (0.1Droplet dynamics was simulated with the help of LS-Dyna solver, whereas the stress analysis was performed

Keywords: hydraulic descaling     scale     rolling     water-hammer     descaling theory    

A fast antibiotic detection method for simplified pretreatment through spectra-based machine learning

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 3, doi: 10.1007/s11783-021-1472-9

Abstract:

• A spectral machine learning approach is proposed for predicting mixed antibiotic.

Keywords: Antibiotic contamination     Spectral detection     Machine learning    

Effect of UAV prewetting application during the flowering period of cotton on pesticide droplet deposition

Weixiang YAO, Xianju WANG, Yubin LAN, Ji JIN

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 4,   Pages 455-461 doi: 10.15302/J-FASE-2018232

Abstract:

Prewetting process can reduce the contact angle between the droplet and the leaf blade, so that thedroplet can more easily wet and spread, thereby increasing the quantity of deposition.The results revealed that with no prewetting, droplet deposition quantity decreased with increasing leafAfter prewetting, the mean droplet deposition quantity on plots B, C and D increased by 39.8%, 9.7% andIt was also found that the mean droplet deposition quantity in each leaf blade angle range increased

Keywords: aerial spray     cotton     deposition     flowering period     leaf angle     prewetting     UAV    

The size distribution of airborne bacteria and human pathogenic bacteria in a commercial composting plant

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 3, doi: 10.1007/s11783-020-1356-4

Abstract:

•Bacterial concentrations from eight stages were 104–105copies/m3.

Keywords: Size distribution     Airborne bacteria     Biological diversity     Human pathogenic bacteria     Composting plants    

Influence of sprinkler irrigation droplet diameter, application intensity and specific power on flower

Yisheng ZHANG, Delan ZHU

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2,   Pages 165-171 doi: 10.15302/J-FASE-2017145

Abstract: To determine the main parameters of droplet strike damage and avoid flower injury due to the unsuitablepractices during sprinkler irrigation, an indoor experiment of irrigation droplet impact on cyclamenThe influences of different parameters such as droplet diameter, application intensity, specific powerApplication intensity was also correlated with injury when the droplet diameter was larger than 1 mm.

Keywords: application intensity     damage     floriculture     flowers     specific power     sprinkler irrigation    

Particle size distribution and shape control of Au nanoparticles used for particle gun

S. Kida, M. Ichiji, J. Watanabe, I. Hirasawa

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 1,   Pages 60-64 doi: 10.1007/s11705-013-1313-x

Abstract: However, the control of particle size distribution (PSD) and shape of Au nanoparticles is too difficultMoreover, in single-jet and double-jet, the mean size of the obtained Au particles increases with the

Keywords: reduction crystallization     particle size distribution     gene transferring media    

Title Author Date Type Operation

Droplet spectra and high-speed wind tunnel evaluation of air induction nozzles

Qing TANG, Liping CHEN, Ruirui ZHANG, Min XU, Gang XU, Tongchuan YI, Bin ZHANG

Journal Article

Comparison of droplet distributions from fluidic and impact sprinklers

Xingye ZHU,Shouqi YUAN,Junping LIU,Xingfa LIU

Journal Article

Online recognition of drainage type based on UV-vis spectra and derivative neural network algorithm

Journal Article

A CFD study of the transport and fate of airborne droplets in a ventilated office: The role of dropletdroplet interactions

Journal Article

Development of a seismic design method based on response spectra for building structures

ZHOU Xiyuan, YU Ruifang

Journal Article

Analysis of the radiation heat transfer process of phase change for a liquid droplet radiator in space

Jinying YIN, Linhua LIU

Journal Article

Modeling and simulation of droplet translocation and fission by electrowetting-on-dielectrics (EWOD)

Nathan HOWELL, Weihua LI

Journal Article

Dynamical analysis of droplet impact spreading on solid substrate

Zhaomiao LIU, Huamin LIU, Xin LIU,

Journal Article

Synthesis of crystals and particles by crystallization and polymerization in droplet-based microfluidic

Jingtao WANG, Jin ZHANG, Junjie HAN,

Journal Article

Numerical study of droplet dynamics impinging onto steel plate covered with scale layer

Jan BOHá?EK, Ale? HORáK

Journal Article

A fast antibiotic detection method for simplified pretreatment through spectra-based machine learning

Journal Article

Effect of UAV prewetting application during the flowering period of cotton on pesticide droplet deposition

Weixiang YAO, Xianju WANG, Yubin LAN, Ji JIN

Journal Article

The size distribution of airborne bacteria and human pathogenic bacteria in a commercial composting plant

Journal Article

Influence of sprinkler irrigation droplet diameter, application intensity and specific power on flower

Yisheng ZHANG, Delan ZHU

Journal Article

Particle size distribution and shape control of Au nanoparticles used for particle gun

S. Kida, M. Ichiji, J. Watanabe, I. Hirasawa

Journal Article