Visualization of Unsteady Separated Flows

Multiscale Feature Detection in Unsteady Separated Flows

Very complex flow structures occur during separation that can appear in a wide variety of applications involving flow over a bluff body. This study examines the ability to detect the dynamic interactions of vortical structures generated from a Helmholtz instability caused by separation over bluff bodies at large Reynolds number of approximately 104 based on a cross stream characteristic length ...

Visualization of Numerical Unsteady Fluid Flows

Instantaneous streamlines are commonly used to visualize particle paths in steady flows. It is shown, however, that streaklines are often more appropriate for unsteady flows. The typical size of unsteady flow simulations makes interactive visualization difficult if not impossible. Two common approaches for visualizing unsteady flows are described. The advantages and disadvantages of each are di...

GPUFLIC: Interactive and Accurate Dense Visualization of Unsteady Flows

The paper presents an efficient and accurate implementation of Unsteady Flow LIC (UFLIC) on the Graphics Processing Unit (GPU). We obtain the same, high quality texture representation of unsteady two-dimensional flows as the original, time-consuming method but leverage the features of today’s commodity hardware to achieve interactive frame rates. Despite a remarkable number of recent contributi...

Numerical Simulation of Unsteady Low-Reynolds-Number Separated Flows over Airfoils

boundary-layeredge is still slightly freestreamdependent, the level of eddy viscosity and therefore also the skin-friction coefŽ cient are not. Furthermore, the velocity distribution is consistent with the law-of-the-wall solution. As a second test case, the RAE2822 airfoil is considered (in particular, case 9 of Ref. 11). Figure 2 compares the pressure and skinfriction distributions of the dif...

Unsteady Flows in Turbines