| Selected Results | ||
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| Sample problem 1: Vorticity after 80 time steps at resolution 128x128 from the vortex-in-a-box calculation. | Sample problem 2: Density after 240 time steps at resolution 64x128 from the bubble drop calculation. | Sample problem 3: Vorticity at T = 1.0 at resolution 128x128 from the doubly periodic shear layer calculation. |
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| Forced Shear Layer: Here are a pair of MPEG movies (click on the images), showing results of two 512 x 128 VarDen calculations. For these cases, the left boundary has time-dependent inflow conditions and the right boundary is outflow. Top and bottom are slip walls. Shown here is a time sequence of the vorticity. In the first case, the inflow is forced with the fundamental perturbation frequency plus the first harmonic, resulting in the pairwise merging behavior evolving downstream. In the second case, the inflow is forced at the fundamental and second harmonics, resulting in a triple-merging behavior. See the paper by Almgren, Bell, Szymczak for more details about this problem and the projection method used to carry out these calculations. |
There are two ways to obtain the VarDen code. You may download the entire CCSE Applications Suite, or you may download just the serial varden2d and varden3d, and parallel pVarden directories, as well as the directories necessary to run these codes and view the results with AmrVis. Included in the varden2d, varden3d, and pVarden directories are README files which describe how to set up and run the codes. Also included are sample problem set-up files to simulate a vortex-in-a-box, a bubble drop, a doubly periodic shear layer, viscous channel flow with advection of a passive scalar, and Poiseuille flow problems. Sample plotfiles which can be generated with these input files are available as well, for viewing with amrvis2d and amrvis3d.
For more information about VarDen, contact Ann Almgren of CCSE.