This paper explores the application of Plenoptic Particle Image Velocimetry (PIV) to study a Shock Wave-Turbulent Boundary Layer Interaction (SBLI) induced by an unswept fin. The fin is placed in a Mach 2 flow at an angle of attack of 15 •. The oblique shock wave introduced by the fin interacts with the turbulent boundary layer along the bottom wall. A plenoptic camera is a unique diagnostic tool that captures 3D information using a single camera. This novel imaging system can be combined with particle image velocimetry to obtain 3D velocity data about a flow field. For comparison, the volume analyzed in this study relates to a previous study in the same facility using two planar PIV experiments separated by approximately 12 mm. This is the first application of a plenoptic camera for volumetric studies of SBLI, and it has proven the unique capabilities of the plenoptic camera to obtain 3D velocity information in areas of limited optical access and in supersonic flows. Comparison with previous planar PIV shows the same interaction structure present in both results.
Implementing small-scale rivers and channels within large-scale background sediment transport simulation is challenging because of the significant resolution difference. The modeling requires coupling between the background model and 1-D channel model. Based on a previously developed coupling method for hydrodynamic simulation, in this paper, a novel immersed-boundary (IB) type coupling method is developed and implemented for the sediment transport simulation. This coupling method enables dynamic linking between the channel and background with a relatively simple manner, and improves the efficiency and accuracy of the sediment transport simulation as water exchanges between the channel and background occur during a flooding event.
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