gravity waves found

[solrey]

You have clearly proven that you would rather argue than learn.

We are discussing natural convection and why it is absolutely dependent on gravity.

Harvey, I'm not trying to argue. I thought we were talking about convection in general based on your first comment on the subject.

Convection is a gravitational reaction where a volume of gas with lower density is pushed up by surrounding gases of the same volume but greater density.

You never used the term natural convection in that post.

Whatever the case, the rest of us recognize the difference between natural convection and forced convection and the absolute dependence on gravity for natural convection to occur.

Yeah, I know the difference. But you weren't specific at first.
Perhaps neither of us noticed that you later switched gears and started using the specific term natural convection all of a sudden? David wasn't specific, he just used the general term convection also. So basically my comments were pointing out that there is more than one type of convection, like you said.

Anyway, apologies for taunting you. That wasn't cool on my part.

[david lambright]

SEAgel

check this out too!....SEAgel...YouTube - SEAgel Aerogel lighter than air solid. Not a UFO

[Harvey]

@ Solrey,

No worries


@ David,

It's edible LOL - So when we get to Mars we can eat the ship

I missed those Shleren motion shots with the butane and the flame, do you know where they are? Thanx

[IndianaBoys]

I missed those Shleren motion shots with the butane and the flame, do you know where they are? Thanx

Harvey,

I believe you are looking for this one:

Schlieren - Butane Torch

YouTube - Schlieren - Butane Torch

This also has a butane torch:

Many Things Shown With Schlieren Photography

YouTube - Many Things Shown With Schlieren Photography

IndianaBoys

[sucahyo]

Automotive ignition coils are DC, not AC. All automotive electric systems are DC. Alternating current is generated by the alternator internally, but the electricity supplied to the battery is converted to DC by a rectifier/diode circuit built into the alternator.

I just test it, forward and reverse, primary and secondary, do not detect any diode present at my coil. The primary is around 2 ohm, the secondary is around 12KOhm, forward and backward. Definitely no diode. I will make video if requested and post it on AC / DC thread. It only produce DC on arc mode. On spark mode it glow both neon electrode. I found diode hamper output.

Or have I understand you wrongly? Are you implying that transformer driven with pulsed DC input will always produce DC output?

I am aware that I am using DC input. A battery powered oscillator that produce pulsed DC. But if you are implying I will only produce DC output, you are wrong. If I remember correctly, I have last year video showing that you can get both depend of frequency and duty cycle with 1A transformer.

If I connect the output to CFL bulb or spark gap, it will produce spark no matter 4 HV diode in series is placed forward or backward.

Do you know which part of the electrode on the neon bulb that will lit with 100V DC?

A flame is just a group of excited atoms and molecules in the gaseous state ...That results in some positive ions (cations), free electrons and even some negative ions (anions) in the flame at any given moment.

If it have polarity, why all part of them flame is repeled by high voltage point? Why I don't observe partial attraction and partial repulsion. The experiment is done with car coil.

Nonsense. Convective, conductive and radiative heat transfer all occur just fine with or without gravity.

Very interested to know if you think this require medium of any kind.

[Harvey]

Harvey,

I believe you are looking for this one:

Schlieren - Butane Torch

YouTube - Schlieren - Butane Torch

This also has a butane torch:

Many Things Shown With Schlieren Photography

YouTube - Many Things Shown With Schlieren Photography

IndianaBoys

Those are good, but unfortunately David didn't use Ian's equipment for his demonstrations [ Retracted: So we still cannot discount air or thermal motion in David's case without the comparison shots on his mirror setup. In other words, if David's mirror cannot demonstrate air movements, then we really don't know if they exist on his rig or not..] I took David's comment to mean that he had demonstrated air moving by butane flow and heat movement by flame on his setup - and I missed that somehow and wanted to view it.



EDIT:
YAY! I found it:

YouTube - schlieren, alot better than the last one.

Good Stuff David, I don't know how I missed this before - but I retract everything I said about not having a reference - clearly, you have shown that there are no air vortices there above the rig

[david lambright]

aerogel or SEAgel

is this stuff expensive and where can it be purchaced?

[Harvey]

is this stuff expensive and where can it be purchaced?

Chunks of aerogel for sale - Boing Boing

Aerogel : United Nuclear , Scientific Equipment & Supplies




Biofoam - Patent 5382285

Biofoam II - Patent 5360828

[david lambright]

mirage...

we see it every where, coming off a car hood, off the pavement, any where there is a temperature difference....but does there have to be a temperature difference for a mirage to happen?...what exactly is a mirage?...i am asking this because my device creates this mirage effect without heat, and without moving air or gas .....if you were at zero G with a balloon filled with hot gas, the heat would radiate out until the temperature was equal, right....david

[Harvey]

Thermal radiation - Wikipedia, the free encyclopedia

Kirchhoff's law of thermal radiation - Wikipedia, the free encyclopedia

Gas - Wikipedia, the free encyclopedia

Heat capacity ratio - Wikipedia, the free encyclopedia

Temperature - Wikipedia, the free encyclopedia

Borrowed from the last link:



A Hot Gas in Zero G will exchange energy with its container until the two equalize thermodynamically. However, it is possible to have special conditions known as superheating or supercooling where thermal energy is not passed out of the fluid. You can find videos on you-tube demonstrating this phenomenon.

But radiation is temperature dependent, not differential dependent. A balloon of hot gas at 100°K does not radiate more or less EM energy just because it's surroundings are 50°K or 200°K. So the specific radiation value is relative to absolute zero, not the surroundings. Where the surroundings become a factor is when they are giving energy back to the gas, like our atmosphere for instance. The surroundings here are around 300°K so the air is held near that temperature (on average). So in that case you could say that the heat radiates inward into the gas .

So if you put your hot gas balloon in a true vacuum in zero-G and surround it with unidirectional 100% absorptive material (absorbs all energy on the inside surface and radiates it out to the outside surface) then eventually that balloon would reach 0°K (neglecting ZPE) because all of its thermal energy would be dissipated and no energy would be given back. How does my hypothetical differ from a modern day vacuum Dewar? A vacuum flask, Thermos or Dewar generally has a reflective coating on the interior to keep the EM radiation from escaping.

As regards Mirages and Sun Dogs - I posted in this thread before, some links to videos. These things have more to do with reflected angles than thermal composition. But really anything that can cause a density separation in a medium will cause the light to bend (change direction) when it crosses the boundary between the two mediums. If this was happening in your case, I think the Schleren photos should have revealed it - unless it was too subtle to show up .

One thing I don't think we have considered is Rayleigh scattering - Wikipedia, the free encyclopediathat may be somehow related to your rig. Perhaps very small particles are attracted to the cavities or the internal magnetic flux trapped in the PMH structure. If so, these particles may suspend themselves in proximity at some distance from the rig where they find an electrostatic equilibrium and this may be why Bruce was able to see the various colors after the rig sat still for long periods. Perhaps your environment has more of these particles than other environments. I don't know, I'm just trying to eliminate all the possibilities. Unfortunately, this hypothesis would be hard to test because the particles could always be present on the surface of the rig and it could be nearly impossible to scrub it completely. But, doing so and then placing the device in a good vacuum may at least give more information to use in the analysis.

[gravityblock]

when i aim my laser at the device,from 10 feet away, i can feel a force pushing back !! in the video i will show that this force can be seen and it is distorting light like a heat wave..you will see it too as soon as i figure out how to get this video posted...tonight hopefully.

Can you take a video with the laser suspended by a string while it is aimed at your device, so we can see if there is a force pushing back? Maybe you can record the video with a cell phone if you're unable to borrow the video camera you used for the other videos. If the laser device is deflected in any kind of way, then I think you will convince the majority of people here that the glimmer effect is more than a mirage and our eyes are not playing tricks on us.

Thanks,

GB

[david lambright]

the laser

i have a camera, not the same camera i used to shoot mikes house #3...the problem i am having is the laser level i am using is aluminum, and testing for a "pushing" force is difficult to get right....the effect is very subtle, but it is there .....i am not working today so i will try to get something usable on video...david

[broli]

i have a camera, not the same camera i used to shoot mikes house #3...the problem i am having is the laser level i am using is aluminum, and testing for a "pushing" force is difficult to get right....the effect is very subtle, but it is there .....i am not working today so i will try to get something usable on video...david

How about you hang the laser from a thread. Then grab the rotor and move it around it, surely this should affect it significantly if you said you could feel the force.

[Cloxxki]

How about you hang the laser from a thread. Then grab the rotor and move it around it, surely this should affect it significantly if you said you could feel the force.

Exactly. The laser would be hung from as tall a ceiling as possible, shooting roughly horizontally. A mark on a wall or board could be made for reference.
Then bring the device in range, wiggle it as much as you like, of course limiting air disruption. If there is a force of any kind, the laser will move from its marker overcoming gravity through the long tether. Longer really is better for this tether, vital obviously is a stable fulcrum.

Good luck!!

[gravityblock]

@David:

In addition to what Broli and Cloxxki suggested, after the laser pointer is stable with zero movement and you have the location of the laser beam marked for a reference position, then you can use a picture frame or something to temporarily reflect the laser beam away so you can position the PMH under the mark. After the PMH is in position, then you can remove the picture frame and the laser beam should return to the reference mark. If it doesn't return to the mark and we can see the laser beam moving around, then we will know the PMH has a force on the laser pointer.

Thanks,

GB