Fluid-Structural Interaction Simulation of Vortices behind a Flexible Vortex Generator

This paper computationally studied the strength of wake structures behind a free-oscillating flexible vortex generator (FVG) by computing the circulation around the FVG using Fluid-Structural Interaction (FSI) simulation of RANS (SST) k-ω model. The amount of circulation found that the vortex generated by the FVG is stronger than those generated by the rigid vortex generator (RVG). This result has demonstrated that the FVG has a better turbulence generation ability compared to the RVG, suggesting improved energy transport for better heat transfer rate or improving aerodynamics performance. In addition., the result of the analysis was used to justify the proposed flow model for stronger turbulence phenomenon. According to the model, the case with greater structural velocity will result in a greater shear or circulation. For this purpose, the structural velocity was computed and the result demonstrates an excellent agreement with the model's prediction. This has further strengthened the reliability of the proposed model.