Seungwon Shin
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View article: Direct numerical simulation of two-phase flows with surfactant-induced surface viscous effects
Direct numerical simulation of two-phase flows with surfactant-induced surface viscous effects Open
Direct numerical simulations of interfacial flows with surfactant-induced complexities involving surface viscous stresses are performed within the framework of the Level Contour Reconstruction Method (LCRM); this hybrid front-tracking/leve…
View article: Droplet impact and splashing on surfactant-laden shallow pools
Droplet impact and splashing on surfactant-laden shallow pools Open
International audience
View article: Digital Module 39: Introduction to Generalizability Theory
Digital Module 39: Introduction to Generalizability Theory Open
Module Abstract Generalizability theory (GT) is a widely used framework in the social and behavioral sciences for assessing the reliability of measurements. Unlike classical test theory, which treats measurement error as a single undiffere…
View article: Surfactant-laden breaking wave: regular and spilling regimes
Surfactant-laden breaking wave: regular and spilling regimes Open
We investigate the influence of insoluble surfactants on the spatio-temporal evolution of breaking waves, focusing on both regular and spilling regimes. Three-dimensional direct numerical simulations are conducted using an interface-tracki…
View article: Marangoni-driven patterns, ridges and hills in surfactant-covered parametric surface waves
Marangoni-driven patterns, ridges and hills in surfactant-covered parametric surface waves Open
Parametric oscillations of an interface separating two fluid phases create nonlinear surface waves, called Faraday waves, which organise into simple patterns, such as squares and hexagons, as well as complex structures, such as double hexa…
View article: Marangoni-driven patterns, ridges, and hills in surfactant-covered parametric surface waves
Marangoni-driven patterns, ridges, and hills in surfactant-covered parametric surface waves Open
Parametric oscillations of an interface separating two fluid phases create nonlinear surface waves, called Faraday waves, which organise into simple patterns, like squares and hexagons, as well as complex structures, such as double hexagon…
View article: Drop Medusa: Direct numerical simulations of high-frequency Faraday waves on spherical drops
Drop Medusa: Direct numerical simulations of high-frequency Faraday waves on spherical drops Open
This paper is associated with a poster winner of a 2023 American Physical Society Division of Fluid Dynamics (DFD) Milton Van Dyke Award for the work presented at the DFD Gallery of Fluid Motion. The original poster is available online at …
View article: On the interaction between a rising bubble and a settling particle
On the interaction between a rising bubble and a settling particle Open
This study investigates the interaction between a freely rising, deformable bubble and a freely settling particle of the same size due to gravity. Initially, an in-line configuration is considered while varying the Bond, Galilei and Archim…
View article: Improbable Bigrams Expose Vulnerabilities of Incomplete Tokens in Byte-Level Tokenizers
Improbable Bigrams Expose Vulnerabilities of Incomplete Tokens in Byte-Level Tokenizers Open
Tokenization is a crucial step that bridges human-readable text with model-readable discrete tokens. However, recent studies have revealed that tokenizers can be exploited to elicit unwanted model behaviors. In this work, we investigate in…
View article: Tweezers: A Framework for Security Event Detection via Event Attribution-centric Tweet Embedding
Tweezers: A Framework for Security Event Detection via Event Attribution-centric Tweet Embedding Open
Twitter is recognized as a crucial platform for the dissemination and gathering of Cyber Threat Intelligence (CTI). Its capability to provide real-time, actionable intelligence makes it an indispensable tool for detecting security events, …
View article: Surfactant-laden bubble bursting: Dynamics of capillary waves and Worthington jet at large Bond number
Surfactant-laden bubble bursting: Dynamics of capillary waves and Worthington jet at large Bond number Open
We present a numerical study of the main substages preceding aerosol formation via bursting bubbles: capillary wave propagation along the bubble, convergence at the bubble's apex, and the ascent of a Worthington jet and its breakup to rele…
View article: Liquid–Liquid Dispersion Performance Prediction and Uncertainty Quantification Using Recurrent Neural Networks
Liquid–Liquid Dispersion Performance Prediction and Uncertainty Quantification Using Recurrent Neural Networks Open
We demonstrate the application of a recurrent neural network (RNN) to perform multistep and multivariate time-series performance predictions for stirred and static mixers as exemplars of complex multiphase systems. We employ two network ar…
View article: Surfactant-laden bubble bursting: dynamics of capillary waves and Worthington jet at large Bond number
Surfactant-laden bubble bursting: dynamics of capillary waves and Worthington jet at large Bond number Open
We present a numerical study of the main sub-stages preceding aerosol formation via bursting bubbles: capillary wave propagation along the bubble, convergence at the bubble's apex, the ascent of a Worthington jet and its break-up to releas…
View article: NUMERICAL STUDY OF THE REMOVAL PERFORMANCE OF THE OIL PEELING PROCESS ACCORDING TO THE SKIMMER STRUCTURE AND EXTERNAL VIBRATION
NUMERICAL STUDY OF THE REMOVAL PERFORMANCE OF THE OIL PEELING PROCESS ACCORDING TO THE SKIMMER STRUCTURE AND EXTERNAL VIBRATION Open
With growing interests in the marine environment, endeavors aimed at reducing impact from pollutants are being increased. Fuel with lower sulfur acid becomes popular since it can reduce pollutants with relatively low cost. However, this Lo…
View article: Ignore Me But Don't Replace Me: Utilizing Non-Linguistic Elements for Pretraining on the Cybersecurity Domain
Ignore Me But Don't Replace Me: Utilizing Non-Linguistic Elements for Pretraining on the Cybersecurity Domain Open
Cybersecurity information is often technically complex and relayed through unstructured text, making automation of cyber threat intelligence highly challenging. For such text domains that involve high levels of expertise, pretraining on in…
View article: Drop encapsulation and bubble bursting in surfactant-laden flows in capillary channels
Drop encapsulation and bubble bursting in surfactant-laden flows in capillary channels Open
We present a parametric study of the unsteady phenomena associated with the flow of elongated gas bubbles traveling through liquid-filled square capillaries under high Weber number conditions. These conditions induce the formation of an in…
View article: DRAINCLoG: Detecting Rogue Accounts with Illegally-obtained NFTs using Classifiers Learned on Graphs
DRAINCLoG: Detecting Rogue Accounts with Illegally-obtained NFTs using Classifiers Learned on Graphs Open
As Non-Fungible Tokens (NFTs) continue to grow in popularity, NFT users have become targets of phishing scammers, called NFT drainers.Over the last year, $100 million worth of NFTs were stolen by drainers, and their presence remains a seri…
View article: Neural network-based regression for heat transfer and fluid flow over in-line cylinder arrays with random pitch distances at low Reynolds number
Neural network-based regression for heat transfer and fluid flow over in-line cylinder arrays with random pitch distances at low Reynolds number Open
Finding an arrangement, leading to a higher heat transfer and lower pressure drop, is crucial in the design of heat exchangers. Previous studies have primarily focused on regular arrangements with uniform pitch distances, which lack applic…
View article: Axisymmetric and azimuthal waves on a vibrated sessile drop
Axisymmetric and azimuthal waves on a vibrated sessile drop Open
This paper is associated with a poster winner of a 2022 American Physical Society’s Division of Fluid Dynamics (DFD) Gallery of Fluid Motion Award for work presented at the DFD Gallery of Fluid Motion. The original poster is available onli…