Density measurements using the Background Oriented Schlieren technique
نویسندگان
چکیده
منابع مشابه
Density measurements using the Background Oriented Schlieren technique
This paper describes the implementation of a novel technique called Background Oriented Schlieren that can produce quantitative visualization of density in a flow. This technique uses only a digital still camera, a structured background, and inverse tomographic algorithms which can extract two-dimensional slices from a three-dimensional flow. This has been applied to obtain the density field fo...
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A method is described for measuring the density distribution in an inhomogeneous medium. This method is based upon the classical Schlieren technique, known as Background Oriented Schlieren (BOS) method. The method measures the density dependence of the refractivity through the detection of the deflecting angle of a number of light beams passing through the space to be measured. The results of s...
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The determination of flow field properties of large-scale explosions which is necessary for better understanding and flow modeling is rather challenging and difficult. Recent studies show that micro-explosions can be an acceptable substitute. However, quantitative determination of the flow field is still a challenge given the extremely short duration and spatio-temporal evolution of the flow. D...
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Two quantitative schlieren methods are assessed and compared: calibrated color schlieren (CCS) and background oriented schlieren (BOS). Both methods are capable of measuring the light deflection angle in two spatial directions, and hence the projected density gradient vector field. Spatial integration using the conjugate gradient method returns the projected density field. To assess the perform...
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ژورنال
عنوان ژورنال: Experiments in Fluids
سال: 2004
ISSN: 0723-4864,1432-1114
DOI: 10.1007/s00348-004-0807-1