Originally Posted by Protagonist
Intuitively, it's like a washing machine. Or should be.
It works better if you add detergent to reduce the surface tension of the water so it can soak in better. He didn't add detergent.
It works better if you add enough water during the wash cycle to cover everything that's dirty. He didn't add water until the rinse cycle.
It works better with an agitator than without one. Well, he had an agitator, in the form of ice.
Which means that the test in the video is not exactly conclusive evidence that the ice cube method is a myth. He could have added more water, added soap, and even more ice. (And he could have driven on bumpy, potholed New Orleans streets rather than a parking lot, to really
churn up the water!
) If he had, he might have gotten different results. Or he might not have. More testing is required. Accepted scientific and engineering practice suggests that a single test does not prove or disprove a hypothesis.
But the "Add a bag or two of Ice Cubes to the tank and drive around and all will be great" is what is always stated as if it is fact. This You Tube video at least attempts to show that it may not be, with a real test, not "intuitively"
You equate the ice cubes in the tank as if it were a washing machine. It is not. Only "intuitively".
Have you looked at a new top loading, no center post washer, the ones which are on the market now? They don't add enough water to hardly wet the clothes. They have re thought the washing process, and done engineering tests apparently and have found that a huge amount of water is not needed to wash clothes. It is amazing how little water is needed to run a cycle in today's washers.
Unfortunately intuition of how things should work is not the engineering way. It is a guide for further study, but not a proof of fact.
The You Tube video is at least a decent attempt to prove or disprove the ice cube cleaning of black tanks claims. In my engineering mind it is far better than an Intuitive justification.
We need a 10 million dollar government sponsored research program to find the truth.....Do ice cubes in an RV tank really clean them? LOL. But even then the results will be challenged by someone who does not like what they find.