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Registered Member #698
Joined: Thu May 10 2007, 01:03PM
Location:
Posts: 2
I've noticed what appears to be a different reaction to an electric field for water as a liquid and water vapor. However, I don't have a VDG to test this with a stronger electric field, and I wondered if anyone has noticed this as well.
Situation one: Glass of water vs. electrically charged glass rod.
When the charged rod is moved over the water, it moves up towards the charged rod forming a cone-like structure before discharging with a snap sound. After the snap the water returns to a rest position and there is significantly reduced electrical charge on the glass rod.
Notes: No appreciable difference between normal tap water, distilled water, and salty water.
Situation two: Humidifier vs. electrically charged glass rod.
After generating some cool water vapor via humidifier and then placing it in an insulating container, the electrically charged rod is moved towards the mist in the container (ice cream as it turns out). The water vapor flows away from the charged rod and will overflow the container to avoid the rod. After removing the rod it seems to have no appreciable "wetness" or loss in electric charge.
Note: The uncharged rod also causes mist to flow, but not to the extent that an uncharged rod does. i.e. only via displacement of air.
So, basically it seems like the water as a liquid is being attracted to a high voltage source, while the water vapor is being repelled.
What I'd really like to do is get a VDG and put a wire from the sphere into an otherwise completely insulated container and see the effects from a stronger electric field than I can generate using glass/silk methods, and to that end I've started to put together a VDG, but in the meanwhile, has anyone seen a similar effect?
For example, mist around powerlines in the morning perhaps? Or otherwise simply things experienced while using a VDG?
It strike me as odd that the typical advise that is high voltage sources leak and ground themselves if there is high humidity, but that doesn't seem to be the case at all in this (not particularly high voltage) example.
Registered Member #538
Joined: Sun Feb 18 2007, 08:33PM
Location: Finland
Posts: 181
Your tap water is grounded (opposite polarity compared to your glass rod) and your mist is not so the water particles get charged by the rod and get repelled.
Registered Member #698
Joined: Thu May 10 2007, 01:03PM
Location:
Posts: 2
1) My tap water is grounded? Its in in a glass (ie. insulated container). not streaming out of the tap. Besides, water coming out of the tap attracted to a charged object via induced surface charge (see lord kelvins water dropper electrostatic generator).
2) If the particles get charged and repelled by the rod there should be a constant stream of uncharged particles moving towards the rod, getting charge, and moving away. I don't see that happening; and if it did, the charge on the rod would surely drop, which it doesn't.*
Registered Member #521
Joined: Wed Feb 14 2007, 06:03PM
Location: Ontario - Canada
Posts: 9
I would think it may have something to do with air partials between water vapor changing the Permittivity of the overall system. I will give it a try with my 100Kv supply and some artificial fog. It's interesting that it displaces it though, almost as if there was a forcefield around it with enough pressure to offset the air pressure.
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High voltage on Water vs. Water vapor
