Clik here to view.
Questioning Particle Generation Due to Cavitation Erosion as a Source of...
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...
View ArticleConductivity Calculations
Previous blogs have talked about heat conductivity in very general terms to produce a foundation for this somewhat more technical view for those of you who like formulas and numbers. Conductive heat...
View ArticleClik here to view.
Heat Conductivity and Convection
Heat conductivity is a measure of the ability of a material to transfer heat within itself. For example, if you heat one end of a short piece of copper wire, the heat is quickly distributed throughout...
View ArticleClik here to view.
Heat – Definitions and Concepts
Temperature has been identified as one of the important variables in cleaning – arguably the most important. So I thought it might be worth some time to develop a little understanding of heat – –...
View ArticleExhausting Gasses Produced by the Cleaning Process
In many industrial cleaning processes it is necessary to exhaust emissions that unavoidably result from the cleaning process. The reasons for exhaust can take on a large range - Remove heat that would...
View ArticleClik here to view.
How do you measure surface tension?
In the world of industrial cleaning technology we talk about surface tension a lot! So much so, in fact, that it is hard to enter into any discussion of cleaning without having the subject of surface...
View ArticleSurface Tension and/or Wettability
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...
View ArticleClik here to view.
Reliability of Plumbing Fittings – Threaded vs. Compression
Wherever there are liquids there are leaks – it’s inevitable. Leaks, of course cost money in downtime and repair of industrial cleaning systems. So, you ask, what is the best defense against leaks....
View ArticleUltrasonic Drying – Not Yet but Possible???
There has been a lot of buzz lately on the internet regarding work at the Oak Ridge National Laboratory to develop a dryer that uses ultrasonics instead of heat to dry things. The major thrust seems...
View ArticleClik here to view.
Venting
The environment in the area of an industrial cleaning system is often not a “healthy” one for personnel or equipment. Caustic and acidic cleaning chemistries rise as mist above cleaning processes...
View ArticleClik here to view.
Laminar Flow
When a liquid or a gas flows uniformly and without turbulation, the result is called “laminar flow.” The most visual example of laminar flow for most of us are those arching water displays where...
View ArticleClik here to view.
Ultrasonic “Double Boiler”
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...
View ArticleClik here to view.
More Isn’t Always Better
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...
View ArticleCleaning Sintered or Porous Parts
Most surfaces that we encounter in industrial cleaning are relatively smooth and contiguous. We have talked earlier about the difficulties of cleaning blind holes, threads, capillary spaces and other...
View ArticleClik here to view.
Electricity Behind the Walls
Electricity is not something we give considerable attention to in our daily lives. At home or at work (or wherever) there are electrical outlets. We simply plug devices into the outlets and the...
View ArticleClik here to view.
Three Phase Power – Why and How
Three phase power is commonly used where large amounts of electrical power are required. Examples are power transmission lines and large industrial machines which require considerable power. What is...
View ArticleClik here to view.
A Little About RMS (Root Mean Squared)
Most of us are aware that the power we get from the power line coming into our house or factory comes as alternating current. Basically, the voltage on the “hot” wire as referenced to ground varies,...
View ArticleUltrasonics – The Trouble With Watts – Part 2
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...
View ArticleClik here to view.
Ultrasonic “Shadowing”
We in the ultrasonics industry have long been aware of an effect which is sometimes called “ultrasonic shadowing.” In general, this is what happens when parts being cleaned are positioned in such a...
View ArticleThe Trouble With Watts
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....
View Article
