ИСТИНА

Progress (revolution) in digital imaging in recent years launched the process of mutual influence of CFD and experimental flow visualization and image processing. The opportunities presented by the use of comparison of the experimental flow visualization, image processing and CFD visualization are discussed. Examples of comparison of numerical and experimental flow visualization, obtained by different imaging techniques are shown: PIV images, schlieren, BOS, thermography, discharge visualization, high speed shadowgraphy of shock waves, etc. Comparison of numerical and experimental patterns may be successfully used for CFD validation, physical process model correction, experiment improving. Digital convergence of experimental and computational visualization provides an opportunity to apply new methods of image processing to experimental data with purpose to define flow structures and to trace them with high accuracy. Application of image processing methods and CFD visualization can be also useful for elimination of experimental artifacts in results. Digital numerical and experimental flow fields visualization matching is shown to be an effective tool for the analysis of hydrodynamic processes in complex 2D and 3D non-stationary flows.