Change of Emulsion Structure During Heating and Boiling

In this paper, the authors consider the processes of dynamic interaction between the boiling particles of the dispersed phase of the emulsion leading to the large droplet breakup. Differences in the consideration of forces that determine the breaking of non-boiling and boiling droplets have been indicated in the study. They have been determined by the possibility of using the model to define the processes of displacement, deformation, or fragmentation of the inclusion of the dispersed phase under the influence of a set of neighboring particles. The dynamics of bubbles in a compressible liquid with consideration for interfacial heat and mass transfer has also been analyzed in the paper. The effect of standard and system parameters on the intensity of cavitation processes is considered. Physical transformations during the cavitation treatment of liquid are caused not only by shock waves and radiated pressure pulses but also by extreme thermal effects. At the stage of ultimate bubble compression, vapor inside the bubble and the liquid in its vicinity transform into the supercritical fluid state. The model analyzes microflow features in the inter-bubble space and quantitatively calculates local values of the velocity and pressure fields, as well as dynamic effects.

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“…where m, c are fuel oil mass and heat capacity and Q is the fuel oil heat flow to be determined by the methods proposed in [38].…”

Section: Resultsmentioning

confidence: 99%

Application of Thermal and Cavitation Effects for Heat and Mass Transfer Process Intensification in Multicomponent Liquid Media

Pavlenko

Koshlak

2021

Energies

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“…(iv) Production challenges: it has been stated that the cost of producing SAFs varies, ranging from €0.88 per litre for HEFA to €1.87 per litre for FT-gasification, which are 2–5 times more expensive than petroleum jet fuel. 56…”

Section: Current Safs Feedstocks Technologies and Challengesmentioning

confidence: 99%

The future of aviation soars with HTL-based SAFs: exploring potential and overcoming challenges using organic wet feedstocks

Usman

Cheng

Boonyubol

et al. 2023

Sustainable Energy Fuels

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“…The wide variability of bubble dynamics allows them to be used in a wide range of useful applications, such as surface cleaning [11][12][13]. Cavitation can also be initiated for other tasks, such as emulsification, sonophoresis, and homogenization [14][15][16][17]. Jet flows formed during a cavitation bubble collapse can reach a velocity of 80 m/s and can be used for microfluidic pumping and to create vortices for vigorous short-term mixing in microfluidic devices [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…If, in the study of boiling processes, the most interesting and important from an applied point of view is the thermal stage of growth [14][15][16][17], which occupies almost the entire lifetime of the bubble, then, when studying the dynamics of the collapse of cavitation bubbles, the final stage of maximum compression seems to be more important for practical applications. At this stage, the duration of which is measured in nanoseconds and is only a millionth of the lifetime of a cavitation bubble [30,31], powerful acoustic effects and the destructive dynamic effect of bubbles fully manifest themselves.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous studies [14,15,17], we developed two models: the growth model of a single bubble and the model of the influence of bubbles in a cluster on the stability of the cluster, which we now want to combine and develop in this work to develop a methodology that allows us to estimate the total effect of the cluster depending on various conditions for the development of a cavitation cluster.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Modeling of the Behavior of Bubble Clusters in Cavitation Processes

Pavlenko

2024

Energies

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To study the behavior of a bubble clusters in cavitation devices, a numerical study of the dynamics of bubbles in a compressible liquid was performed, taking into account interfacial heat and mass transfer. The influence of regime and system parameters on the intensity of cavitation processes is considered. Physical and chemical transformations during the cavitation treatment of liquids are caused not only by the action of shock waves and emitted pressure pulses but also by extreme thermal effects. At the stage of extreme compression of the bubble, the vapor inside the bubble and the liquid in its vicinity transform into the state of a supercritical fluid. The presented model analyzes the nature of microflows in the interbubble space and carries out a quantitative calculation of the local values of the parameters of the velocity and pressure fields.

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Change of Emulsion Structure During Heating and Boiling

Cited by 12 publications

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Application of Thermal and Cavitation Effects for Heat and Mass Transfer Process Intensification in Multicomponent Liquid Media

Application of Thermal and Cavitation Effects for Heat and Mass Transfer Process Intensification in Multicomponent Liquid Media

The future of aviation soars with HTL-based SAFs: exploring potential and overcoming challenges using organic wet feedstocks

Numerical Modeling of the Behavior of Bubble Clusters in Cavitation Processes

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