This paper investigates unsteady incompressible flow over cavities. Previous research in incompressible cavity-flow has included flow inside and past a 2-dimensional cavity, and flow inside a 3-dimensional cavity, dri...This paper investigates unsteady incompressible flow over cavities. Previous research in incompressible cavity-flow has included flow inside and past a 2-dimensional cavity, and flow inside a 3-dimensional cavity, driven by a moving lid. The present research is focused on incompressible flow past a 3-dimensional open shallow cavity. This involves the complex interaction between the external flow and the re-circulating flow within the cavity. In particular, computation was performed on a 3-dimensional shallow rectangular cavity with a laminar boundary layer at the cavity and a Reynolds number of 5,000 and 10,000, respectively. A CFD approach, based on the unsteady Navier-Stokes equations for 3-dimensional incompressible flow, was used in the study. Typical results of the computation are presented. These results reveal the highly unsteady and complex vortical structures at high Reynolds numbers.展开更多
文摘This paper investigates unsteady incompressible flow over cavities. Previous research in incompressible cavity-flow has included flow inside and past a 2-dimensional cavity, and flow inside a 3-dimensional cavity, driven by a moving lid. The present research is focused on incompressible flow past a 3-dimensional open shallow cavity. This involves the complex interaction between the external flow and the re-circulating flow within the cavity. In particular, computation was performed on a 3-dimensional shallow rectangular cavity with a laminar boundary layer at the cavity and a Reynolds number of 5,000 and 10,000, respectively. A CFD approach, based on the unsteady Navier-Stokes equations for 3-dimensional incompressible flow, was used in the study. Typical results of the computation are presented. These results reveal the highly unsteady and complex vortical structures at high Reynolds numbers.
