scholarly journals An Analysis of the Water-to-Ice Phase Transition Using Acoustic Plate Waves

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 919
Author(s):  
Vladimir Anisimkin ◽  
Vladimir Kolesov ◽  
Anastasia Kuznetsova ◽  
Elizaveta Shamsutdinova ◽  
Iren Kuznetsova
Keyword(s):  
Lamb Waves ◽  
Coupling Constants ◽  
Wave Radiation ◽  
Phase System ◽  
Two Phase ◽  
Aircraft Wings ◽  
Transformation Time ◽  
Vertical Displacements ◽  
Time Variations ◽  
Mechanical Transduction

It is shown that, in spite of the wave radiation into the adjacent liquid, a large group of Lamb waves are able to propagate along piezoelectric plates (quartz, LiNbO3, LiTaO3) coated with a liquid layer (distilled water H2O). When the layer freezes, most of the group’s waves increase their losses, essentially forming an acoustic response towards water-to-ice transformation. Partial contributions to the responses originating from wave propagation, electro-mechanical transduction, and wave scattering were estimated and compared with the coupling constants, and the vertical displacements of the waves were calculated numerically at the water–plate and ice–plate interfaces. The maximum values of the responses (20–30 dB at 10–100 MHz) are attributed to the total water-to-ice transformation. Time variations in the responses at intermediate temperatures were interpreted in terms of a two-phase system containing both water and ice simultaneously. The results of the paper may turn out to be useful for some applications where the control of ice formation is an important problem (aircraft wings, ship bodies, car roads, etc.).

Ultrasonic Sonic Imaging for a Two Phase System Based on Support Vector Machine Classifier

2014 ◽  
Vol 1016 ◽  
pp. 273-278
Author(s):  
Mohd Faizal Mat Desa ◽  
Muhammad Naufal Mansor ◽  
Ahmad Kadri Junoh ◽  
Amran Ahmed ◽  
Wan Suhana Wan Daud ◽  
...  
Keyword(s):  
Support Vector Machine ◽  
Lamb Waves ◽  
Industrial Process ◽  
Observation Time ◽  
Support Vector ◽  
Phase System ◽  
Ultrasonic Tomography ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Process Tomography

Multiphase flow characterization is an important task for monitoring, measuring or controlling industrial processes. This can be done by means of process tomography. The use of tomographic techniques has been used within the oil industry. One of the potential applications is flow visualization and measurement in producing wells. Research on industrial process tomography consists in obtaining estimated images of a cross section of a pipe or vessel containing or carrying the substances of the process. One category of process tomography is ultrasonic tomography technique. A simple tomography can be built by mounting a number of sensors around the circumference of a horizontal pipe. This includes acquiring and processing ultrasonic signals from the transducers to obtain the information of the spatial distributions of liquid and gas in an experimental column. Analysis on the transducers’ signals will be carrying out to distinguish between the observation time and the Lamb waves. The information obtained from the observation time is useful for further development of the image reconstruction. To obtain the time easily, the time will be calculated from the starting pulse of transmitter signal until the starting peak of receiver signal. Finally Support Vector Machine (SVM) was employed to distinguish of each phase between water and gas.

On the Problem of “Two-Phase” Activated Sludge

1991 ◽  
Vol 24 (7) ◽  
pp. 59-64 ◽  
Author(s):  
R. W. Szetela
Keyword(s):  
Activated Sludge ◽  
Single Phase ◽  
Phase System ◽  
Two Phase ◽  
Wastewater Treatment Process ◽  
Sludge Stabilization ◽  
Technological Advantage ◽  
In Series ◽  
State Models ◽  
Activated Sludge Systems

Steady-state models are presented to describe the wastewater treatment process in two activated sludge systems. One of these makes use of a single complete-mix reactor; the other one involves two complete-mix reactors arranged in series. The in-series system is equivalent to what is known as the “two-phase” activated sludge, a concept which is now being launched throughout Poland in conjunction with the PROMLECZ technology under implementation. Analysis of the mathematical models has revealed the following: (1) treatment efficiency, excess sludge production, energy consumption, and the degree of sludge stabilization are identical in the two systems; (2) there exists a technological equivalence of “two-phase” sludge with “single-phase” sludge; (3) the “two-phase” system has no technological advantage over the “single-phase” system.

Interphase distribution of 2-furylethylenes

1985 ◽  
Vol 50 (8) ◽  
pp. 1642-1647 ◽  
Author(s):  
Štefan Baláž ◽  
Anton Kuchár ◽  
Ernest Šturdík ◽  
Michal Rosenberg ◽  
Ladislav Štibrányi ◽  
...  
Keyword(s):  
Partition Coefficient ◽  
Partition Coefficients ◽  
Transport Rate ◽  
Phase System ◽  
Two Phase ◽  
Interphase Distribution ◽  
Distribution Kinetics ◽  
System 1 ◽  
Kinetics Of

The distribution kinetics of 35 2-furylethylene derivatives in two-phase system 1-octanol-water was investigated. The transport rate parameters in direction water-1-octanol (l1) and backwards (l2) are partition coefficient P = l1/l2 dependent according to equations l1 = logP - log(βP + 1) + const., l2 = -log(βP + 1) + const., const. = -5.600, β = 0.261. Importance of this finding for assesment of distribution of compounds under investigation in biosystems and also the suitability of the presented method for determination of partition coefficients are discussed.

Enhancing the Sensitivity of DNA and Aptamer Probes in the Dextran/PEG Aqueous Two-Phase System

2021 ◽  
Author(s):  
Qiaoshu Chen ◽  
Yanwen Zhang ◽  
Hui Chen ◽  
Jianbo Liu ◽  
Juewen Liu
Keyword(s):  
Phase System ◽  
Two Phase ◽  
Aqueous Two Phase System

Development of an ethanolic two-phase system (ETPS) based on polypropylene glycol 2000 + ethylene glycol + ethanol for separation of hydrophobic compounds

2021 ◽  
Author(s):  
Filipe Smith Buarque ◽  
Cleide Mara Faria Soares ◽  
Ranyere Lucena de Souza ◽  
Matheus Mendonça Pereira ◽  
Álvaro Silva Lima
Keyword(s):  
Ethylene Glycol ◽  
Phase System ◽  
Polypropylene Glycol ◽  
Two Phase ◽  
Hydrophobic Compounds ◽  
Ethanol Content ◽  
Coexisting Phases ◽  
Phase Water ◽  
High Ethanol

Two-phase water-free systems containing high ethanol content in the coexisting phases can selectively partition hydrophobic molecules from natural biomass.

Continuous Purification of an Enveloped and Non-enveloped Viral Particle Using an Aqueous Two-Phase System

2021 ◽  
pp. 118753
Author(s):  
Dylan G. Turpeinen ◽  
Pratik U. Joshi ◽  
Seth A. Kriz ◽  
Supreet Kaur ◽  
Natalie M. Nold ◽  
...  
Keyword(s):  
Viral Particle ◽  
Phase System ◽  
Two Phase ◽  
Aqueous Two Phase System

scholarly journals Partitioning of bovine lactoferrin in aqueous two-phase system containing poly(ethylene glycol) and sodium citrate

2015 ◽  
Vol 95 ◽  
pp. 118-124 ◽  
Author(s):  
Angélica Ribeiro da Costa ◽  
Jane Sélia dos Reis Coimbra ◽  
Luísa Alexandre Ferreira ◽  
João Carlos Marcos ◽  
Igor José Boggione Santos ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Sodium Citrate ◽  
Bovine Lactoferrin ◽  
Phase System ◽  
Poly Ethylene Glycol ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
Poly Ethylene
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