Experimental procedure and results

Date: 2015-10-07; view: 479.

The mathematical model given by Eq. (39) for the proposed acoustic field technology was verified by building a flow chamber as shown in Fig. 8 (1). The back electrode of the load transducer was connected to an Anritsu Synthesizer/level signal generator MG 443B through an ENI 1040L power amplifier to power the transducer. The other transducer (acting as a receiver) was connected to a Textronix T912 Oscilloscope.

Fig. 8. Acoustic chamber.

Silicon carbide (SiC), C = 29.97% and Si = 70.03%, 5–20 μm size with a specific gravity of 3.217 was used for the experimental verification. A charged coupled device (CCD) color camera (NEC model NX18A) was fixed to the microscope with a magnification of 10× lens and 10× eyepieces for observation of the particles. A Stocker and Yale Fiber optic light (model number 20) with 150 W intensity was placed behind the chamber to illuminate particles for recording. The CCD camera had two video outputs. One was connected to a TV/VCR for video recording, while the other was connected to a Gateway 2000 P5-120 computer for digital image capturing and analysis card (WinTV 2000).