The blog The Effects of Liquid Properties on Ultrasonic Cleaning discussed what effect(s) liquid properties might have on ultrasonic cleaning effectiveness. These are summarized here – – Many physical properties are inherent to the liquid. De-ionized water, for example, due to its very high surface tension and tensile strength (as a result of its lack of impurities) is difficult …
The physical properties of liquids have a significant effect on their ability to cavitate and produce imploding cavitation bubbles useful for ultrasonic cleaning. Since other factors including temperature and chemistry can have an effect on the physical properties of liquids, these, too, play a significant role in ultrasonic cleaning. This blog explores the effect that a number …
In ultrasonic cleaners, sound waves (vibration) originating from ultrasonic transducers must be efficiently transmitted into the cleaning liquid where they create cavitation bubbles which implode to enhance cleaning. The weak links in the path from the transducer to the cavitating liquid are typically the locations or “interfaces” where vibrations must be transmitted from one vibrating …
Ultrasonic power has been a topic of much discussion ever since ultrasonic technology was first used for cleaning nearly a century ago. The quest has always been for more ultrasonic power, the thought being that higher power would produce better cleaning results. As I have discussed earlier, higher ultrasonic power typically requires an increase in the amplitude …
Ultrasonic cleaning is widely used for removing particles from surfaces. It is generally agreed that the high energy of implosions of cavitation bubbles break the bonds holding particles to the surface being cleaned and that liquid motion (streaming) carries the particles away once they have been dislodged. However, it is also well known that ultrasonic cavitation …
A few days ago, I sat down to write what I thought would be a simple explanation of surface tension and how it is measured in the laboratory (a blog which will be published shortly if I can figure all of this out). In doing the normal background research, however, I started to see contradictions …
Maximum ultrasonic performance requires the most efficient transfer of ultrasonic vibrations from the ultrasonic transducers to the liquid in the process tank. This is generally accomplished by applying ultrasonic transducers directly to the exterior surfaces of a tank containing the process liquid. Transducer attachment techniques favor attachment to metals like stainless steel. What if the chemistry to be used …
Earlier blogs have shown how difficult and deceptive it can be to relate energy consumed to work delivered. In this blog I would like to offer an example of this difficulty as it relates directly to ultrasonic transducers and cleaning. First of all, most (if not all) ultrasonic devices used for cleaning utilize a number …
As discussed in a previous blog, one problem with watts is that watts do not equal energy. Let’s carry that thought a little further again using the vehicle analogy I put forth in the initial blog of this series. In the ultrasonic world it is common to associate the effectiveness of an ultrasonic cleaning tank its …
Some time ago I wrote a paper entitled “What is a Watt.” Although this paper seems lost in history (I can not find a copy of it), I can remember the point that I was trying to make when I wrote it. In essence, it made the case that a watt is only an instantaneous …
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