水流中流体成像分析和描述检测方案(粒子图像测速)

In the Fluid project, WorkPackage 1 is devoted to the creation of an image sequence database with controlled 2D/3D experimental and numerical ow elds. The objective of this workpackage is to produce complete sets of data comprising:  meteorological satellite atmospheric image sequences;  rst sets of image sequences of controlled uid mechanics experiments (air ows in wind tunnels), produced in a classical way using laser-sheets and cameras, with a smoke or particle concentration chosen a priori in order to give reasonably detectable contrasts;  second sets of experimental image sequences produced in an adapted manner (seeding, lighting, frame size, physical data range) after feedback from tests conducted in WP 2, WP 3 and WP 4;  synthetic image sequences coming from the results of Direct Numerical Simulations (DNS) of shear ows;  quantitative data characterising the ows corresponding to each set of experimental image sequences, among which global and local physical characteristics like velocity elds, statistics, spatial correlation as well as topological dimensions of specic regions of the ow (formation length, layer thickness, virtual origins, wave length, etc). This report is the deliverable D1.23 on the production and diusion of uid mechanics images and data. All the dataset distributed during the rst year to the dierent partners are described. Section 2 concerns two experimental datasets, the rst one is not time resolved but the second is. Section 3 presents 2D-synthetic data of analytic ows, DNS of 2D sustained turbulent ow and a sample of 2D ow from PIV Challenge. The last section 4 is devoted to 3D-synthetic data.