CashFlow, A Visualization Framework for 3D Flow - Studierstube ...

Results5.3. Curvilinear Grid Visualization5.3 Curvilinear Grid VisualizationFigure 5.13: CashFlow Curvilinear Grid Visualization: Blue lines visualize the radial components of thecell while red lines show the axial components and their spacing. The most inner plane of the grid is shownin yellow.A lot of CFD data sets are defined on curvilinear grids. Several algorithms havebeen published on fast rendering of curvilinear grids. Different to equally spacedCartesian grids and rectilinear grids the shape of a curvilinear grid is not obvious. Thusvisualizing the grid itself is an important topic as in figure 5.13 and figure 5.14.Figure 5.13 shows a visualization of a hemisphere defined on a curvilinear grid.The most inner layer of this grid is rendered as yellow surface. This is the externaltank of the space shuttle (see figure 5.16 on page 112). The high density of the innerlayers is illustrated with a red point–cloud surrounding the external tank in yellow.Finally the most outer layer is visualized using radial concentric arches in blue andaxial components of the grid in red.Figure 5.14 focus on the space shuttle and its curvilinear grid. The red concentriclines define two planes perpendicular to the longitudinal axis.110