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©Cleaning Technologies Group
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Sound . . .Sound . . .Sound Is Vibration Transmitted Through an Elastic Material
UltraSound . . .UltraSound . . .Sound at a Higher Frequency
Sound
UltraSound
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
Think of the black line above as the edge view of a metal plate
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Sound is Created by a Source of Vibration
Now Imagine an “Ultrasonic Transducer” Attached to the Metal Plate
Ultrasonic Transducer
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
Ultrasonic Transducer
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
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Now Imagine that the Metal Plate is the Bottom of a Vessel or “Tank”
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Now Imagine that the Metal Plate is the Bottom of a Vessel or “Tank”
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And that the Tank is Filled with Liquid
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And that the Tank is Filled with Liquid
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Now Let’s Re-Start the Vibration
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Now Let’s Re-Start the Vibration
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Now Let’s Re-Start the Vibration
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Now Let’s Re-Start the Vibration
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Now Let’s Re-Start the Vibration
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Now Let’s Re-Start the Vibration
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As the tank bottom raises, it pushes against the liquid thereby
compressing it. The blue represents an area of “compression”.
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The “compression” continues to travel through the liquid away from the source of vibration.
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As the tank bottom lowers it “pulls” on the liquid creating an area of negative pressure
or “rarefaction”
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Continued vibration generates areas of
compression and rarefaction radiating through the liquid
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Now add a pressure gauge to measure pressure at a given point in the liquid
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As the rarefactions and compressions of the sound waves pass by, the gauge sees alternating negative and positive pressure
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As the rarefactions and compressions of the sound waves pass by, the gauge sees alternating negative and positive pressure
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As the rarefactions and compressions of the sound waves pass by, the gauge sees alternating negative and positive pressure
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A vibrating source transmits sound waves to a liquid.
Sound waves, consisting of areas of rarefaction (negative pressure) and compression (positive pressure), radiate through the liquid away from the source of vibration.
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Imagine now a small defect in the liquid consisting of a bubble or speck of dirt
.
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The a “cavitation bubble” starts to grow around the defect under influence of negative pressure
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Growth of the “cavitation bubble” continues and
accelerates under increasingly negative pressure
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Growth of the “cavitation bubble” continues and
accelerates under increasingly negative pressure
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Growth of the “cavitation bubble” continues and
accelerates under increasingly negative pressure
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Growth of the “cavitation bubble” continues and
accelerates under increasingly negative pressure
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The “cavitation bubble” shrinks under the influence of growing
positive pressure
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The catastrophic collapse of the cavitation bubble under
increasing pressure results in implosion!
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The high energy resulting from the implosion of millions of
cavitation bubbles do the work associated with ultrasonics
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