SiC particle trajectories in an acoustic field

Date: 2015-10-07; view: 393.

With large SiC particles, it was possible to track the motion of individual particles during the application of acoustic energy. Individual SiC particles were tracked and their positions were captured using the arrangement discussed earlier.

Movements of particles were tracked at different acoustic energy levels ranging from 0.5 to 5.0 W at equal increments of 0.5 W. Digital capturing at a rate of 30 frames per second was made at all these power levels and each capture was stored in separate AVI files. After converting the AVI files into JPEG frames, Adobe PhotoShop 5 was used to obtain particle displacements for each frame at 1/30 s intervals. Fig. 9 shows photographs of particle movement from four consecutive frames. Using the horizontal and vertical distance calibration charts and pixel positions, the x and y coordinates of tracked particles with time were obtained. Graphs were produced for the experimental axial displacement versus time at different power levels (1).

Fig. 9. Photographs of the displacement of SiC particles in an acoustic field.