A new versatile laser sheet generator for flow visualization

Prenel, Jean-Pierre; Jeudy, M.

doi:10.1016/s0030-3992(99)00006-7

Cited by 5 publications

(7 citation statements)

References 6 publications

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“…Even though the produced laser sheet is thin, the distribution of the light intensity of the laser sheet emitted from 532 nm 50 mW laser module is not a true plane. The laser sheet intensity profile observed here is similar to that theoretically analyzed by [7]. However, this laser module still has the following ad- meet Reynolds number and, ultimately, dynamic similitude requirements to ensure that the model and the testing conditions have the same dimensionless parameters.…”

Section: Discussionsupporting

confidence: 63%

“…An ideal laser module has to be able to produce a light sheet that has a consistent thickness so that the recorded field of view's dimensions are constant throughout the whole flow field. This generates high signal to noise ratio and low amount of parasite scattered light [7] [8]. Doing this enables a trustworthy qualitative and quantitative observation of spatial flow structures [5].…”

Section: Methodsmentioning

confidence: 97%

“…This research is comparing the dimension of the light sheets produced from four different (wavelength and electric power) laser modules-650 nm 100 mW, 650 nm 30 mW, 532 nm 50 mW, and 405 nm 100 mW ( Figure 1). The considered dimensions of light sheet are sheet thickness, length, and focusing distance [7] because they determine the has to be thin in order to limit the width of view of the illuminated region.…”

Section: Methodsmentioning

confidence: 99%

“…Cylindrical optical components have been used to produce static laser sheets/planes and are regularly used in both aerodynamics and hydrodynamics experiments [7]. This research is using manufactured cylindrical glass lens to convert laser dot into laser sheet ( Figure 2).…”

Section: Methodsmentioning

confidence: 99%

“…The experiment setup of this technique requires a light source that is thin and monochromatic in order to illuminate sediments or tracers in the flow [5]. However, an ideal laser sheet generator is rather expensive, especially for schools and universities residing in low-income countries, and requires multiple adjustable telescopic lenses to setup [7]. This project is proposing a less-expensive and simple to setup option for a laser sheet source and flow visualization experiment configuration for quantitative observation and analysis of the interaction between fluid media and sediments.…”

mentioning

confidence: 99%

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Flow Visualization and Modeling for Education and Research in Sedimentary Processes: An Accessible and Inexpensive Alternative

Motanated¹

2017

GEP

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Sedimentary processes have direct effects on the geometry, distribution, and geophysical and geochemical properties of sedimentary rocks. Being able to qualitatively and quantitatively visualize the movement vector of sediments in fluid media is essential for understanding the complicated earth surface processes. Nonintrusive measuring and observing the interaction between the movement of fluid media and particles by a laser sheet flow visualization technique requires a light source that is thin and monochromatic. Yet, an ideal laser sheet generator is rather expensive and inaccessible, especially for schools and universities residing in low-income countries. This project is proposing a less-expensive option for a laser sheet source for nonintrusive flow visualization and modeling. Here, cylindrical lens is used to convert from point laser into sheet laser. Multiple combinations of laser diodes of various wavelength (nanometer) and power (milliwatt) and cylindrical lenses of various dimensions are analyzed. The pair that is able to produce the thinnest and brightest light sheet is not only effective but also affordable. The combination of manufactured laser module of 532 nm 50 mW and a single rod lens is able to generate a light sheet that is less than 4 mm thick. When choosing a laser module, this research recommends one at a wavelength of 532 nm with any electric power (high wattage results in high lumens).

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Section: Discussionsupporting

confidence: 63%

Section: Methodsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Flow Visualization and Modeling for Education and Research in Sedimentary Processes: An Accessible and Inexpensive Alternative

Motanated¹

2017

GEP

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Shear‐induced migration and axial development of particles in channel flows of non‐Brownian suspensions

et al. 2020

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We present an experimental study on the shear-induced migration and axial development of particles in the channel flows of non-Brownian suspensions. The suspending fluid is Newtonian. We investigate fracturing flows with a Hele-Shaw type scaling through building a unique channel setup and an advanced optical system. The local particle concentration profiles are measured via the refractive-index matching technique for a wide range of bulk volume fraction, that is, 0:1 ≤ ϕ b ≤ 0:5. Simultaneously, the particle image velocimetry is performed to determine the velocity profile of the particle phase. We compare our experimental results with the available two-phase continuum frameworks and show discrepancies and similarities in the fully developed and axial development of the solid volume fraction profiles. We discuss directions in which the continuum frameworks require improvements.

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Engineered transparent emulsion to optically study particulate flows in yield stress fluids

2020

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A new versatile laser sheet generator for flow visualization

Cited by 5 publications

References 6 publications

Flow Visualization and Modeling for Education and Research in Sedimentary Processes: An Accessible and Inexpensive Alternative

Flow Visualization and Modeling for Education and Research in Sedimentary Processes: An Accessible and Inexpensive Alternative

Shear‐induced migration and axial development of particles in channel flows of non‐Brownian suspensions

Engineered transparent emulsion to optically study particulate flows in yield stress fluids

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