An extra-thin light sheet technique used to investigate meniscus shapes by laser induced fluorescence
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Abstract
A light sheet technique is described to accurately (50 μm) measure meniscus profiles in film formation problems. The use of a slit to create the thin (0.1 mm) laser sheet makes the technique easy to implement, and allows tunable sheet thickness. The low light intensity obtained through the slit is compensated by the induced fluorescence of the tested fluid, which provides good picture contrast. After video recording through a microscope, the actual meniscus is recovered by image processing and proper calibration. The efficiency of the technique is demonstrated on a coating flow experiment. Due to its good accuracy and ease of use, this technique is expected to provide useful quantitative information about meniscus problems, in particular for the validation of CFD solutions of coating flows.
Keywords
Video Recording Quantitative Information Film Formation Sheet Thickness Laser SheetPreview
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References
- Alvi FS; Settles GS (1992) Physical model of the swept shock wave/boundary-layer interaction flowfleld. AIAA J 30: 2252–2258Google Scholar
- Coyle DJ; Macosko CW; Scriven LE (1986) Film-splitting flows in forward roll coating. J Fluid Mech 171: 183–207Google Scholar
- Fowles GR (1975) Introduction to modern optics. New York: Holt, Rinehart and Winston, Inc.Google Scholar
- Hanson RK; Seitzman JM; Paul PH (1990) Planar laser fluorescence imaging of combustion gases. Appl Phys B 50: 441–454Google Scholar
- Merzkirch W (1974) Flow Visualisation. New York: Academic PressGoogle Scholar
- Pratt WK (1978) Digital Image Processing. New York: John Wiley and SonsGoogle Scholar
- Ruschak KJ (1985) Coating flows. Ann Rev Fluid Mech 17: 65–89Google Scholar
- Schweizer PM (1988) Visualisation of coating flows. J Fluid Mech 193: 285–302Google Scholar
- Svelto O (1976) Principles of lasers. New York: Plenum PressGoogle Scholar