Time-resolved three-dimensional imaging of flame refractive index via endoscopic background-oriented Schlieren tomography using one single camera

2020 ◽  
Vol 97 ◽  
pp. 105621 ◽  
Author(s):  
Hecong Liu ◽  
Chongyuan Shui ◽  
Weiwei Cai
Keyword(s):  
Refractive Index ◽  
Three Dimensional ◽  
Single Camera ◽  
Three Dimensional Imaging ◽  
Time Resolved ◽  
Background Oriented Schlieren

Globule-Globule Interactions during Deformation in Semi-Solid Al-Cu Using Time-Resolved X-Ray Tomography

2012 ◽  
Vol 192-193 ◽  
pp. 179-184
Author(s):  
Kristina Maria Kareh ◽  
Peter D. Lee ◽  
Christopher M. Gourlay
Keyword(s):  
Solid Fraction ◽  
Three Dimensional ◽  
Solid Alloy ◽  
Three Dimensional Imaging ◽  
Time Resolved ◽  
X Ray ◽  
Analysis Techniques ◽  
Solid Deformation ◽  
Fundamental Understanding ◽  
Semi Solid

Optimising semi-solid processing and accurately modelling semi-solid deformation requires a fundamental understanding of the globule-scale mechanisms that cause the macroscopic rheological response. In this work, apparatus and analysis techniques are being developed for the time-resolved, three-dimensional imaging of semi-solid alloy deformation. This paper overviews synchrotron X-ray tomography results on globular Al-15wt%Cu deformed at 0.7 solid fraction using extrusion. The globule-globule interactions in response to load were quantified in terms of the response of individual globules with respect to globule translation, rotation, and deformation. The potential of time-resolved X-ray tomography in the study of semi-solid alloy deformation is then discussed.

scholarly journals Three-dimensional density measurements of a heated jet using laser-speckle tomographic background-oriented schlieren

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Shoaib Amjad ◽  
Julio Soria ◽  
Callum Atkinson
Keyword(s):  
Refractive Index ◽  
Turbulent Flows ◽  
Measurement Techniques ◽  
Three Dimensional ◽  
Density Field ◽  
Laser Speckle ◽  
Spatial Density ◽  
Reference Image ◽  
Mixing Processes ◽  
Background Oriented Schlieren

Three-dimensional density field measurement techniques can be used to understand the complex heat transfer and mixing processes that occur in turbulent flows. Tomographic background-oriented schlieren (BOS) is an optical technique that can be used to measure the instantaneous three-dimensional density field in turbulent flows. Light rays propagating through the flow are deflected from their ambient path due to variations in refractive index related to the spatial density gradients. In BOS, a camera is placed looking through the flow at a reference image, which captures path-integrated information on the refractive index gradients in the form of apparent image displacements Richard and Raffel (2001). The displacements recorded simultaneously from many cameras placed around the flow form the basis of a tomographic reconstruction of the three-dimensional refractive index gradients Goldhahn and Seume (2007), from which the density field is obtained through integration of the gradients and application of the Gladstone-Dale relation.

scholarly journals Coupling Time-Resolved in-situ Experiments with Three-Dimensional Imaging - a New Approach to Defect Evolution Studies

2011 ◽  
Vol 17 (S2) ◽  
pp. 440-441
Author(s):  
I Robertson ◽  
G Liu ◽  
J Kacher ◽  
I Robertson
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Imaging ◽  
Time Resolved ◽  
New Approach ◽  
In Situ Experiments ◽  
Defect Evolution ◽  
Coupling Time

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.

scholarly journals Three-dimensional imaging of distribution of refractive index by parallel phase-shifting digital holography using Abel inversion

2017 ◽  
Vol 25 (15) ◽  
pp. 18066 ◽  
Author(s):  
Takahito Fukuda ◽  
Yexin Wang ◽  
Peng Xia ◽  
Yasuhiro Awatsuji ◽  
Takashi Kakue ◽  
...  
Keyword(s):  
Refractive Index ◽  
Digital Holography ◽  
Three Dimensional ◽  
Phase Shifting ◽  
Abel Inversion ◽  
Three Dimensional Imaging

High Time-Resolved Three-Dimensional Imaging Using Ultrafast Optical Kerr Gate of Bismuth Glass

2011 ◽  
Vol 23 (8) ◽  
pp. 471-473 ◽  
Author(s):  
Wenjiang Tan ◽  
Junyi Tong ◽  
Jinhai Si ◽  
Yi Yang ◽  
Wenhui Yi ◽  
...  
Keyword(s):  
Three Dimensional ◽  
High Time ◽  
Three Dimensional Imaging ◽  
Time Resolved ◽  
Ultrafast Optical ◽  
Optical Kerr Gate
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