| Flow around one and two circular cylinders in a cross flow arenumerically simulated by Galerkin finite element method and finite volume methodunder different conditions. The flow pattern, the lift and drag, and vortex sheddingfrequencies are mainly investigated. The full contents include three main parts:Firstly, effect of variations of the splitter-plate’s location and length on flowaround a circular cylinder is numerically simulated at Reynolds number of200. Thefluid structure and force acted on the cylinder with the splitter-plate are calculated.Furthermore, the control principle of the splitter-plate is summarized.Secondly, a numerical study on flow around two side-by-side circular cylinderswith three spacing ratios is presented in this section. Three classic flow patterns areobtained. So the present numerical method is validated. Then flow around twoparallel cylinders of three spacing ratios with the splitter-plate is studied. The studyfocus on the impact of the plate’s location and length to two parallel cylinders, whichspacing ratios is1.5. While in the other two spacing ratios, impact of locationdifference is only discussed.Lastly, a numerical simulation is conducted on the three dimensional flowaround a circular cylinder and two cylinders using the Fluent software based on thefinite volume method. The three dimensional flow pattern and lift and drag curve areobtained. The calculation result is consistent with the related literature, so theaccuracy of DES is verified and the foundation for further application is laid. |
