17 citations · 39 across the 16 of their papers we have counts for
17 papers
Apparent Breakdown of the Stress-Optic Rule in Rigid-Rod Suspensions: A Stress-Partitioning Interpretation
William Kai Alexander Worby, Yuto Yokoyama, Misa Kawaguchi +1
A fundamental problem in the field of anisotropic macromolecular materials concerns how the flow-induced orientational order connects microscopic structure to macroscopic rheologic…
Time-Resolved Stress Analysis of Tissue Simulants During Needle-Free Jet Injection
Kohei Yamagata, Prasad Sonar, Kazuhiro Terai +2
Needle-free jet injection generates transient internal stress fields that can influence tissue deformation, pain-related stimulation, and cellular-level mechanical responses. Howev…
Full-component reconstruction of three-dimensional fluid stress tensors
Shunsuke Kumagai, Shun Miyatake, Ryusuke Cho +5
Forces govern how fluids deform biological tissues, regulate cardiovascular function, and determine the performance and failure of soft materials. Recent advances in flow birefring…
Penetration of impact-induced jets into skin-simulating materials
Kohei Yamagata, Yuto Yokoyama, Shoto Sekiguchi +3
This study compares the penetration characteristics of impact-induced jets with those of laser-induced jets, focusing on the underlying penetration mechanism rather than device per…
Interfacial dynamics induced by impacts across rigid and soft substrates
Ishin Kikuchi, Hiroya Watanabe, Yuto Yokoyama +2
We investigate impact-induced gas-liquid interfacial dynamics through experiments in which a liquid-filled container impacts substrates with elastic moduli from MPa to…
Extending flow birefringence analysis to combined extensional-shear flows via Jeffery-Hamel flow measurements
Miu Kobayashi, William Kai Alexander Worby, Misa Kawaguchi +3
This study investigates the relationship between phase retardation and strain rates in combined extensional-shear flows using the Jeffery-Hamel flow formalism, which yields an anal…
Reconstruction of three-dimensional fluid stress field via photoelasticity using physics-informed convolutional encoder-decoder
Daichi Igarashi, Shunsuke Kumagai, Yuto Yokoyama +3
Measuring stress fields in fluids and soft materials is crucial in various fields such as mechanical engineering, medicine, and bioengineering. However, conventional methods that c…
Flow birefringence measurement in a radial Hele-Shaw cell considering three-dimensional effects
Misa Kawaguchi, William Kai Alexander Worby, Yuto Yokoyama +3
Flow birefringence measurement is an emerging technique for visualizing stress fields in fluid flows. This study investigates flow birefringence in the steady radial Hele-Shaw flow…
Droplet impact on elastic substrates: force scaling crossover
Yuto Yokoyama, Hirokazu Maruoka, Yoshiyuki Tagawa
Droplet impacts are fundamental to fluid-structure interactions, shaping processes from erosion to bioprinting. While previous scaling laws have provided insights into droplet dyna…
Experimental study on the relationship between extensional and shear rheology of low-viscosity power-law fluids
Yuzuki Matsumoto, Misa Kawaguchi, Yoshiyuki Tagawa
This paper investigates the relationship between extensional and shear viscosity of low-viscosity power-law fluids. We show the first experimental evidence of the conditions satisf…
Examination of flow birefringence induced by the shear components along the optical axis using a parallel-plate-type rheometer
William Kai Alexander Worby, Kento Nakamine, Yuto Yokoyama +2
In this study, the concept of rheo-optics is applied that explores the flow birefringence caused by stress components along the optical axis of the camera since it is often overloo…
Flow birefringence of cellulose nanocrystal suspensions in three-dimensional flow fields: revisiting the stress-optic law
Kento Nakamine, Yuto Yokoyama, William Kai Alexander Worby +2
This study systematically investigates the flow birefringence of cellulose nanocrystal (CNC) suspensions. The aim is to clarify the importance of the stress component along the cam…
Optimal standoff distance for a highly focused microjet penetrating a soft material
Daichi Igarashi, Kento Kimura, Nanami Endo +3
A needle-free injector using a highly focused microjet has the potential to minimize the invasiveness of drug delivery. In this study, the jet penetration depth in a soft material-…
High-speed photoelastic tomography for axisymmetric stress fields in a soft material: temporal evolution of all stress components
Yuto Yokoyama, Sayaka Ichihara, Yoshiyuki Tagawa
This study presents a novel approach for reconstructing all stress components of the dynamic axisymmetric fields of a soft material using photoelastic tomography (PT) and a high-sp…
The effects of cavitation position on the velocity of a laser-induced microjet extracted using explainable artificial intelligence
Daichi Igarashi, Jingzu Yee, Yuto Yokoyama +2
The control of the velocity of a high-speed laser-induced microjet is crucial in applications such as needle-free injection. Previous studies have indicated that the jet velocity i…
Correlation between morphological evolution of splashing drop and exerted impact force revealed by interpretation of explainable artificial intelligence
Jingzu Yee, Daichi Igarashi, Pradipto +2
This study reveals a possible correlation between splashing morphology and the normalized impact force exerted by an impacting drop on a solid surface. This finding is obtained fro…
Prediction of the morphological evolution of a splashing drop using an encoder-decoder
Jingzu Yee, Daichi Igarashi, Shun Miyatake +1
The impact of a drop on a solid surface is an important phenomenon that has various implications and applications. However, the multiphase nature of this phenomenon causes complica…