Effects of dissolved gas on the nucleation and growth of ice crystals in freezing droplets

2022 ◽  
Vol 184 ◽  
pp. 122334
Author(s):  
Yingling Li ◽  
Minxia Li ◽  
Chaobin Dang ◽  
Xuetao Liu
Keyword(s):  
Nucleation And Growth ◽  
Ice Crystals ◽  
Dissolved Gas

Nucleation and Growth of Bubble With the Effects of Solute Gas

Volume 3 ◽  
2004 ◽  
Author(s):  
Shin-Ichi Tsuda ◽  
Shu Takagi ◽  
Yoichiro Matsumoto
Keyword(s):  
Saturation Pressure ◽  
Pressure Change ◽  
Nucleation And Growth ◽  
Bubble Nucleation ◽  
Dynamics Simulation ◽  
Pure Liquid ◽  
Dissolved Gas ◽  
High Concentration ◽  
Wrong Prediction ◽  
Solvent Molecules

Bubble nucleation and growth of formed nuclei are investigated by molecular dynamics simulation in Lennard-Jones liquid with gas impurities. For the onset of nucleation from bulk, it has been found that a dissolved gas whose interaction is very weak and whose diameter is larger than that of solvent molecules makes the action to cause composition fluctuation or local phase separation so strong that the nucleation probability predicted from pressure change becomes qualitatively wrong. It has been confirmed that this wrong prediction is generally explained by introducing the superheat ratio nondimensionalized by saturation pressure and spinodal pressure. For the growth stage of formed bubble nuclei, it is observed that the coalescence of nuclei occurs when a weak-interaction gas is dissolved at a high concentration while the competition between neighbor nuclei is dominant in the case of pure liquid.

Nucleation and Growth of Bubbles in Elastomers

1971 ◽  
Vol 44 (5) ◽  
pp. 1363-1379 ◽  
Author(s):  
Charles W. Stewart
Keyword(s):  
Surface Tension ◽  
Homogeneous Nucleation ◽  
Nucleation And Growth ◽  
Experimental Results ◽  
Dissolved Gas ◽  
Rate Of Growth ◽  
High Degree ◽  
Approximate Expressions ◽  
Temperature Surface

Abstract The theory of homogeneous nucleation of bubbles is combined with an expression, for their rate of growth in elastomers to obtain approximate expressions for calculating the number of bubbles formed under a high degree of supersaturation. Experimental results are given for several elastomers with argon as the dissolved gas under a variety of foaming conditions. The theory adequately describes the manner in which the number of bubbles formed depends on the temperature, surface tension of the polymer, and permeability of the dissolved gas.

scholarly journals Nucleation and Growth of Ice Crystals Upon Crystalline Substrates

1960 ◽  
Vol 13 (2) ◽  
pp. 408 ◽  
Author(s):  
NH Fletcher
Keyword(s):  
Free Energy ◽  
Experimental Evidence ◽  
Growth Mechanism ◽  
Energy Barrier ◽  
Nucleation And Growth ◽  
Ice Crystals ◽  
Free Energy Barrier ◽  
Surface Imperfections ◽  
Nucleation Sites ◽  
Entropy Effect

The importance of various surface imperfections in the nucleation of ice crystals iR considered and it is concluded that dislocations are not preferred nucleation sites, whereas steps and re-entrant corners do encourage nucleation. Expressions are derived for the height of the free energy barrier in several important cases, and the retention of embryos under unsaturated conditions is discussed. Embryos initially grow by twodimensional nucleation, but ultimately a dislocation growth mechanism becomes more important. There is not yet enough experimental evidence to decide upon the reality of the entropy effect, previousl:y- proposed, which inhibits nucleation upon certain CITRta] faces.

scholarly journals Bubble Nucleation and Growth of Dissolved Gas in Solution Flowing across a Cavitating Nozzle

2015 ◽  
Vol 773-774 ◽  
pp. 304-308 ◽  
Author(s):  
Zhen Hong Ban ◽  
Kok Keong Lau ◽  
Mohd Sharif Azmi
Keyword(s):  
Bubble Dynamics ◽  
Bubbly Flow ◽  
Bubble Formation ◽  
Computational Modelling ◽  
Nucleation And Growth ◽  
Bubble Nucleation ◽  
Supersaturated Solution ◽  
Computational Domain ◽  
Dissolved Gas ◽  
Growth Phenomenon

Computational modelling of dissolved gas bubble formation and growth in supersaturated solution is essential for various engineering applications, including flash vaporisation of petroleum crude oil. The common mathematical modelling of bubbly flow only caters for single liquid and its vapour, which is known as cavitation. This work aims to simulate the bubble nucleation and growth of dissolved CO2 in water across a cavitating nozzle. The dynamics of bubble nucleation and growth phenomenon will be predicted based on the hydrodynamics in the computational domain. The complex interrelated bubble dynamics, mass transfer and hydrodynamics was coupled by using Computational Fluid Dynamics (CFD) and bubble nucleation and growth model. Generally, the bubbles nucleate at the throat of the nozzle and grow along with the flow. Therefore, only the region after the throat of the nozzle has bubbles. This approach is expected to be useful for various types of bubbly flow modelling in supersaturated condition.

Effects of four disaccharides on nucleation and growth of ice crystals in concentrated glycerol aqueous solution

Cryobiology ◽  
2019 ◽  
Vol 86 ◽  
pp. 47-51 ◽  
Author(s):  
Mingke Zhang ◽  
Cai Gao ◽  
Bin Ye ◽  
Jingchun Tang ◽  
Bin Jiang
Keyword(s):  
Aqueous Solution ◽  
Nucleation And Growth ◽  
Ice Crystals

scholarly journals Effect of dissolved-gas concentration on bulk nanobubbles generation using ultrasonication

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jeong Il Lee ◽  
Byung-Seung Yim ◽  
Jong-Min Kim
Keyword(s):  
Surface Tension ◽  
Tensile Strength ◽  
Size Distribution ◽  
Ultrasonic Irradiation ◽  
Liquid Water ◽  
Bubble Growth ◽  
Nucleation And Growth ◽  
Dissolved Gas ◽  
Gas Concentration

Abstract In this study, the effects of dissolved-gas concentration in liquid water on the nucleation and growth of bubbles and nanobubble (NB) generation were investigated by measuring the concentration and size distribution of NBs. Three types of liquids with different dissolved-gas concentrations—undersaturated, saturated, and supersaturated deionized (DI) water—were prepared, and NBs were generated via ultrasonic irradiation. As the dissolved-gas concentration increased, a large number of bubbles with relatively large diameters (several tens of micrometers or more) were generated, but the NB concentration decreased. The surface tension decreased with an increase in the dissolved gas concentration, and thus, the tensile strength which required for bubble growth became lower. Therefore, there were barely any NBs in supersaturated conditions because of the accelerated nucleation and bubble growth.

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