Visual Simulation of Experimental Oil-Flow Visualization by Spot Noise Imagesfrom Numerical Flow Simulation

摘要

In the cases shown here it proved advantageous to simulate the experimentalvisualization technique to a certain extent to ease the comparison. The experimental flow visualization technique represents the surface flow field with oil steaks. We visualized the numerical surface flow field using the spot noise technique. The flow data are pre-processed and the parameters of the spot noise texture are tuned to enhance similarity of the resulting images. The result is a 'visual simulation', based mainly on the choice of the quantities to be visualized and the mapping of these quantities to the spot noise parameters. Analysis of the relation between the pre-processing steps and the visualization parameters allows conclusions about the important mechanisms in the experimental flow visualization technique.