Journal ArticleDOI
Study on instability of circular liquid jets at subcritical to supercritical conditions using dynamic mode decomposition
TLDR
In this article, the effect of variation in the fluid and flow properties of the injecting jet on the nature of instabilities and mixing behavior is investigated, where high-speed imaging techniques are used to capture the jet behavior.Abstract:
The thermodynamic and fluid-dynamic properties associated with the injectant jet significantly influence its fluid dynamic characteristics. In most of the earlier studies on the behavior of liquid jet at high pressure and supercritical environment, the liquid jet is often injected at subcritical initial temperature. In the present study, the effect of variation in the fluid and flow properties of the injecting jet on the nature of instabilities and mixing behavior is investigated. The fluid properties of the injected jet are varied by preheating. High-speed imaging techniques are used to capture the jet behavior. To gain further insight into the instability nature of the jet, linear instability analysis was performed. Dynamic mode decomposition analysis was applied to the obtained high-speed images to extract and understand the relevant dynamic features.read more
Citations
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Book
Atomization and Sprays
TL;DR: In this paper, the basic processes in Atomization are discussed, and the drop size distributions of sprays are discussed.Preface 1.General Considerations 2.Basic Processes of Atomization 3.Drop Size Distributions of Sprays 4.Atomizers 5.Flow in Atomizers 6.AtOMizer Performance 7.External Spray Charcteristics 8.Drop Evaporation 9.Drop Sizing Methods Index
Complete adiabatic evaporation of highly superheated liquid jets
TL;DR: In this paper, a cubic equation of state was used to describe the thermodynamic properties of the liquid and the evaporation was modelled as a sonic deflagration followed by an axisymmetrie supersonic expansion.
Journal ArticleDOI
A review of the state-of-the-art nanofluid spray and jet impingement cooling
TL;DR: In this article, the performance of spray/jet impingement cooling has attracted great attention from the scientific community, and some new functionalities are established such as high heat flux removal capacity, temperature uniformity, lower flow rate demand, and no thermal resistance to the heated test surface.
Absolute and convective instability of a radially expanding liquid sheet
S. P. Lin,W. Y. Jiang +1 more
TL;DR: In this paper, it was shown that absolute instability occurs at We=1, and convective instability occurs in the region where We>1, where ρ and S are the liquid density and surface tension, and H and U are the local half-sheet thickness and the local average liquid velocity.
Journal ArticleDOI
Liquid jet disintegration memory effect on downstream spray fluctuations in a coaxial twin-fluid injector
Abhijeet Kumar,Srikrishna Sahu +1 more
TL;DR: In this article, the influence of unsteadiness in the liquid jet disintegration process on downstream fluctuations of spray characteristics in a coaxial twin-fluid injector was investigated for different axial locations downstream of the injector exit at z = 0, 8Dl, and 30Dl.
References
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Journal ArticleDOI
Dynamic mode decomposition of numerical and experimental data
TL;DR: In this article, a method is introduced that is able to extract dynamic information from flow fields that are either generated by a (direct) numerical simulation or visualized/measured in a physical experiment.
Journal ArticleDOI
Physics of liquid jets
Jens Eggers,Emmanuel Villermaux +1 more
TL;DR: A review of the fundamental and technological aspects of these subjects can be found in this article, where the focus is mainly on surface tension effects, which result from the cohesive properties of liquids Paradoxically, cohesive forces promote the breakup of jets, widely encountered in nature, technology and basic science.
Book
Atomization and Sprays
TL;DR: In this paper, the basic processes in Atomization are discussed, and the drop size distributions of sprays are discussed.Preface 1.General Considerations 2.Basic Processes of Atomization 3.Drop Size Distributions of Sprays 4.Atomizers 5.Flow in Atomizers 6.AtOMizer Performance 7.External Spray Charcteristics 8.Drop Evaporation 9.Drop Sizing Methods Index
Journal ArticleDOI
Drop and spray formation from a liquid jet
S. P. Lin,Rolf D. Reitz +1 more
TL;DR: In this paper, the authors present current scientific knowledge on the subject of liquid jet deblurring and discuss the unresolved scientific issues, including the physical mechanisms involved in the deblating process.
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