Matching-index-of-refraction of transparent 3D printing models for flow visualization

Song, Min Seop; Choi, Hae Yoon; Seong, Jee Hyun; Kim, Eung Soo

doi:10.1016/j.nucengdes.2014.12.019

Cited by 26 publications

(4 citation statements)

References 11 publications

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“…RI-mismatch at the solid-liquid interface often induces undesired refraction or re ection in various optical devices such as particles used in a particle imaging velocimetry, optical lenses, and optical bers. This issue can be eliminated by reducing the difference in RI between the liquid and solid phases using index-matched combinations, such as pairs of immersion oil and glass, mixture oil and epoxy, and p-cymene and polymethyl methacrylate [10][11][12] . Similar to this approach, the use of IMMs was effective in suppressing background re ection (Fig.…”

Section: Discussionmentioning

confidence: 99%

Visualization of Cells at the Solid-microbe Interface Using Confocal Reflection Microscopy With Index-matching Materials

Okano

Hirayama

Nomura

et al. 2021

Preprint

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Herein, we demonstrated that the use of index-matching materials (IMM) allows direct visualization of microbial cells maintained at a solid-liquid interface through confocal reflection microscopy (CRM). The RI mismatch induces a background reflection at the solid-liquid interface, which dwarfs the reflection signals from the cells and results in low-contrast images. We found that the IMM sufficiently suppressed the background reflection at the solid-liquid interface, facilitating the imaging of microbes at the solid surface using CRM. Further, we succeeded in temporal imaging of initial biofilms directly colonizing the IMM with CRM in a tag free fashion, and thus, it is highly advantageous for probing the dynamics of biofilm formation, along with visualization of environmental organisms and newly isolated bacteria, for which transformation methods are difficult to establish.

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Section: Discussionmentioning

confidence: 99%

Visualization of Cells at the Solid-microbe Interface Using Confocal Reflection Microscopy With Index-matching Materials

Okano

Hirayama

Nomura

et al. 2021

Preprint

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“…The processing is carried out by 3D section printing and then bonding and sealing. The material is transparent resin, and the inside of the nozzle resonator is manually polished [29,30]. In order to save research and development costs, a matching scheme of the optimal solution set obtained by nozzle collaborative optimization was selected in this paper to carry out flow field visualization test model processing.…”

Section: Test Modelmentioning

confidence: 99%

Research on Resonance Mechanism and Collaborative Optimization of Double-cavity Self-Excited Oscillating Pulse Cavitation Jet Nozzle

Yuan

Wang

et al. 2021

Preprint

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The peak value and pulsation amplitude of the self-excited oscillating pulse cavitation jet nozzle are important indexes to evaluate the jet performance. It is of great significance in theory and engineering practice to predict the peak value of the self-excited oscillating pulse cavitation jet nozzle accurately. In order to investigate the evolution mechanism of the inner and outer flow field of a double-cavity self-excited oscillation pulse cavitation jet nozzle, a simulation model of the jet impact test of the nozzle was established. Before entrance rounded corners, former cavity cavity diameter, cavity cavity length, before the cavity under the nozzle diameter, cavity, the cavity cavity after entry the rounded, lumen diameter, cavity length and cavity after cavity under the nozzle diameter as design variables, and strike force to combat force peak pulse amplitude as the target variable, the orthogonal experiment method, back propagation neural network combined with non dominated sorting genetic algorithm, The collaborative optimization design method of self-excited oscillating pulse cavitation jet nozzle was determined. Based on the collaborative optimization results, the 3D printing technology was used to manufacture the visualization test model of the flow field of the self-excited oscillating pulse cavitation jet nozzle, and the experimental verification was carried out. The results show that when the inlet pressure is 2MPa, the main and secondary order of the influences of various factors on the jet performance of the nozzle is the nozzle diameter under the front cavity, the diameter of the back cavity, the diameter of the front cavity, the length of the front cavity, the nozzle diameter under the back cavity, the cavity distance, the fillet of the back cavity, the fillet of the front cavity and the length of the back cavity. Compared with the optimal result of orthogonal test, the amplitude of impact pulsation and the peak value of impact force are increased by 14.61% and 2.42% respectively. The optimal structure of the nozzle determined by collaborative optimization can produce obvious pulse cavitation jet, and the cavitation region of the nozzle cavity contracts periodically with time. The higher the inlet pressure, the higher the cavitation intensity and the higher the content of hollow bubble. This study can promote the development of jet performance calculation of self-excited oscillation pulse cavitation jet nozzles, and provide support for the design of self-excited oscillation pulse cavitation jet nozzles.

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“…The research results demonstrate that the VC technology has a considerable application potential in areas where the quality of reproduced external surfaces is of key importance [ 2 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Therefore, the authors decided to use this manufacturing method in their research on manufacturing accurate replicas of mechanoscopic forensic marks.…”

Section: Introductionmentioning

confidence: 99%

Possibility for Replicating Mechanoscopic Surface Marks in the Hybrid Vacuum-Pressure Casting Process

2021

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Vacuum-pressure casting technology allows small batches of components to be manufactured from polymer materials, mainly from thermosetting plastics such as polyurethane and epoxy resins. Apart from being very simple, the process is also advantageous in that it offers a very accurately reproduced geometrical structure of the surfaces of master patterns used in mold manufacturing. This article presents the results of analyses performed for the process of replicating mechanoscopic marks with the use of three vacuum casting variants, including a hybrid vacuum-pressure casting process developed in particular for the replication purposes. The main research objective was to analyze and evaluate the influence of the parameters of the individual process variants on the quality of the obtained cast parts and on the replication accuracy without introducing additional artifacts on their surfaces. The article discusses the individual stages of the process and provides an analysis of their parameters. The replicas were evaluated for their porosity and reproduction quality with the use of CT methods and comparative photographs obtained from a light microscope.

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Matching-index-of-refraction of transparent 3D printing models for flow visualization

Cited by 26 publications

References 11 publications

Visualization of Cells at the Solid-microbe Interface Using Confocal Reflection Microscopy With Index-matching Materials

Visualization of Cells at the Solid-microbe Interface Using Confocal Reflection Microscopy With Index-matching Materials

Research on Resonance Mechanism and Collaborative Optimization of Double-cavity Self-Excited Oscillating Pulse Cavitation Jet Nozzle

Possibility for Replicating Mechanoscopic Surface Marks in the Hybrid Vacuum-Pressure Casting Process

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