Simulating schlieren and shadowgraph images from LES data
نویسندگان
چکیده
منابع مشابه
Schlieren and Shadowgraph Imaging in the Great Outdoors
A review is given of outdoor schlieren and shadowgraph imaging, beginning with an historical perspective. The optical principles of the sunlight shadowgraph method and schlieren observation by background distortion are discussed. Examples and illustrations are given of the visualization of outdoor thermal convection, combustion, and explosion phenomena. Jet aircraft and high-speed flight are fe...
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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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Schlieren imaging in wind-tunnels is extensively utilized to study the effects of air on an airplane surface. One of the interesting subjects for research is to study the effects of speed change on the airplane surface. Speed change results in occurrence of shock waves, which are visualized as lines on Schlieren images. In this paper, we study the problem of detecting speed of a plane after occ...
متن کاملSimulating Film Response Curves from a Pair of LDR Images
HDR Radiance Maps have being widely studied in the last years. In this work we recover HDR Radiance Maps from photographs, using only two shots of the same scene exposed diferently. We also recover film response curves to visualize HDR color images as if they were taken with the photographic film. All the operations used to reconstruct the HDR Radiance Map work on image histograms, the presence...
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ژورنال
عنوان ژورنال: Experiments in Fluids
سال: 2019
ISSN: 0723-4864,1432-1114
DOI: 10.1007/s00348-019-2774-6