DROPLET PHASE CHANGE CHARACTERISTICS DURING MOVING IN THE UNIFORM FLOW IN THE GRAVITY SEPARATION SPACE

2019 ◽  
Vol 2019.27 (0) ◽  
pp. 1166
Author(s):  
Fulong Zhao ◽  
Qianfeng Liu ◽  
Lin Yu ◽  
Ruibo Lu ◽  
Yuhao He ◽  
...  
Keyword(s):  
Phase Change ◽  
Uniform Flow ◽  
Gravity Separation ◽  
Change Characteristics ◽  
Droplet Phase

Critical Conditions for Secondary Droplets Generated by Droplets Colliding Walls With Different Angles

2020 ◽  
Author(s):  
Yikai Wu ◽  
Wenxuan Ju ◽  
Yusheng Liu ◽  
Fulong Zhao ◽  
Sichao Tan
Keyword(s):  
Phase Change ◽  
Separation Efficiency ◽  
Three Dimensional ◽  
Gravity Separation ◽  
Critical Conditions ◽  
Vapor Flow ◽  
Change Model ◽  
Water Separation ◽  
Critical Separation ◽  
Droplet Phase

Abstract The single droplet phase change model during motion is developed based on the phenomena description and mechanism comprehension, which including the droplet phase change model as well as the droplet motion model. Then, the calculation of the droplet phase change characteristics during moving in the uniform flow in the gravity separation space is conducted. The results show that when the droplet are evaporating during its moving, the radius will decrease continuously and it will be carried more easily by the steam vapor, which will lead to the larger separation radii of the droplets and the reduced the gravity separation efficiency. In addition, this paper shows the three-dimensional map for the critical separation over the pressure difference and the steam vapor flow velocity, which can contribute to forecast the influence of the droplet phase change on the separation characteristics. The results can be applied in the design of the steam-water separation plants.

Preparation of PVA/PEG Phase Change Composite Nanofibers by Electrospinning

2011 ◽  
Vol 306-307 ◽  
pp. 37-40 ◽  
Author(s):  
Da Hui Sun ◽  
Tian Yu Xu ◽  
Yong Jia Liu ◽  
Mei Zhang
Keyword(s):  
Phase Transition ◽  
Phase Change ◽  
Composite Nanofibers ◽  
Diameter Distribution ◽  
Weight Percentage ◽  
Weight Content ◽  
Reversible Phase Transition ◽  
Change Characteristics ◽  
Micro Morphology ◽  
Reversible Phase

Phase change PVA / PEG composite nanofibers were prepared by electrospinning, micro-morphology of PVA / PEG fibers with different weight content were analyzed, the phase change characteristics were also analyzed. The result showed that well distributed composite nanofibers which composed by PVA/PEG blend solution can be obtained by electrospinning.PVA fibreforming were influenced because of the existence of PEG, including bond, irregular block, small rough, uneven diameter distribution in fibers. PVA/PEG blend solution of 4:6 weight content was well fibreforming compared with other different weight content.The continuity of spinneret flow in electrospinning would directly affected by polymer solution consentrition and viscosity. Further research about which and the influence in fibers diameter and morphology will be explored. Composite nanofibers possessed reversible phase transition characteristics,Tm Essentially unchanged ,Tcwere related to the weight percentage of PEG/PVA, at the same time, the enthalpy will increase along with the gradually increase in weight percentage of PEG.

Modulation of phase change characteristics in Ag-incorporated Ge2Sb2Te5 owing to changes in structural distortion and bond strength

2017 ◽  
Vol 5 (16) ◽  
pp. 3973-3982 ◽  
Author(s):  
Jeong Hwa Han ◽  
Kwang-Sik Jeong ◽  
Min Ahn ◽  
Dong-Hyeok Lim ◽  
Won Jun Yang ◽  
...  
Keyword(s):  
Bond Strength ◽  
Phase Change ◽  
Chemical Bonding ◽  
Local Structure ◽  
Structural Distortion ◽  
Change Characteristics ◽  
Lower Temperature

Ag-Incorporated Ge2Sb2Te5 (AGST) crystallizes faster and at a lower temperature than Ge2Sb2Te5 (GST) owing to the changes in local structure and chemical bonding.

Improved phase-change characteristics of Si doped GeSbTe thin films used for phase change memory

2012 ◽  
Vol 358 (17) ◽  
pp. 2402-2404 ◽  
Author(s):  
Liang Tong ◽  
Ling Xu ◽  
Yifan Jiang ◽  
Fei Yang ◽  
Lei Geng ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Change ◽  
Phase Change Memory ◽  
Change Characteristics ◽  
Si Doped ◽  
Change Memory

Measurements of Microjet Cooling and Phase Change Characteristics Using Microcantilever Heaters

2007 ◽  
Author(s):  
Jungchul Lee ◽  
Hanif Hunter ◽  
Fabian Goericke ◽  
Nisarga Naik ◽  
Mark Allen ◽  
...  
Keyword(s):  
Phase Change ◽  
Convective Heat ◽  
Temporal Resolution ◽  
Heat Fluxes ◽  
Microcantilever Sensors ◽  
Change Characteristics ◽  
Microscale Flows

This paper reports novel microcantilever metrology tools to investigate free microjets emanating from a micromachined nozzle having 10 μm diameter. Microcantilever sensors are well-suited to interrogate these flows due to their high spatial and temporal resolution. In this work, microcantilevers with integrated piezoresistors have been used to detect the breakup distance of free microjets, and microcantilevers with integrated resistive heaters have been applied to study microjet cooling and phase change characteristics. Measured microjet thrusts were in the range of 10 – 60 μN and heat fluxes were measured in the range of 25 – 350 °C. The convective heat fluxes by microjet impingement boiling were estimated at 2.9 – 7.6 kW/cm2. The techniques reported herein are promising to characterize microscale flows.

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