Refractive index matching methods for liquid flow investigations

R Budwig - Experiments in fluids, 1994 - Springer
Experiments in fluids, 1994Springer
A difficulty common to most optical diagnostic techniques that are applied to fluid dynamics
studies is the refraction of light passing through model and/or test section walls. The method
of choice to eliminate refraction problems in liquid flows is to match refractive index. This
paper presents techniques for refractive index matching including,(i) arrangement of test
section and model,(ii) choice of solid and liquid materials, and (iii) methods for tuning the
match. In addition, a new application of refractive index matching to liquid-liquid droplet …
Abstract
A difficulty common to most optical diagnostic techniques that are applied to fluid dynamics studies is the refraction of light passing through model and/or test section walls. The method of choice to eliminate refraction problems in liquid flows is to match refractive index. This paper presents techniques for refractive index matching including, (i) arrangement of test section and model, (ii) choice of solid and liquid materials, and (iii) methods for tuning the match. In addition, a new application of refractive index matching to liquid-liquid droplet studies is presented.
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