I have one 1/4 inch cell honeycomb fan airflow cooler I will give to someone who is nuts about cooling. Sorry but only have one I can give away in this cell size. This cell size is crazy, no one needs that much air for a PC ever, but if you want it I will send it to you (US). This turns a 120mm fan in to a leaf blower so be prepared to adjust voltage of fan to account for new airflow. photo at 120qin

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Quote: Originally Posted by saxxon68 I have one 1/4 inch cell honeycomb fan airflow cooler I will give to someone who is nuts about cooling. Sorry but only have one I can give away in this cell size. This cell size is crazy, no one needs that much air for a PC ever, but if you want it I will send it to you (US). This turns a 120mm fan in to a leaf blower so be prepared to adjust voltage of fan to account for new airflow. photo at 120qin

What's the spec's? besides it being an 120mm fan

I love Xtreme RPM'S

DIBBS

That's cool, it would be PERFECT for a duct. If Thrasher can't afford shipping or something, I want it tooooooo.

Thrasher spoke first sorry. It is not a fan, It is a Honeycomb Airflow Straightener. You may place it on any fan you have, But I am serious, I went with a smaller cell size because this one is more than what a PC needs. Thrasher PM me your addy and I will send it out too you. Still confused, all this info is on my website. This is not trying to be a plug, I want someone who thinks they need more airflow to check this one out. You may choose your color, red, blue or black housing. I will pay shipping for US, it is not much. You can order one from my webstore saxonpc.com, curently only have the plastic, will have aircraft grade aluminum honeycomb productas in April. But it is not this cell size.

Quote: Originally Posted by ratchetfps That's cool, it would be PERFECT for a duct. If Thrasher can't afford shipping or something, I want it tooooooo.

Tell you what, I will send you a 92mm product for free in return for a product review. PM your addy too ratcetfps and I'll get you one out too.

Quote: Originally Posted by saxxon68 Tell you what, I will send you a 92mm product for free in return for a product review. PM your addy too ratcetfps and I'll get you one out too.

What a true pimp!! I actually have a heatsink that uses a 92mm fan, but my fan right now is too weak. Thanks!

Haha I might just have to get a slew of the 120mm versions if these are as cool as you say. I dunno what you're talking about when you say too much cfm.

Thanks.......

I will put it to the TEST!

The honeycomb won't do anything but add restriction in the airflow path, not increase air flow rate.

Quote: Originally Posted by saxxon68 ya, these fans are not designed to "push" air really, just displace CFM.

This makes no sense. The purpose of any fan is to push air.

Quote: Originally Posted by lAnonymousl The honeycomb won't do anything but add restriction in the airflow path, not increase air flow rate. This makes no sense. The purpose of any fan is to push air.

Wind Tunnels - Honeycomb

Quote: Originally Posted by saxxon68 Wind Tunnels - Honeycomb

And your point is.....?
Flow straighteners are used in wind tunnels to reduce turbulence and study laminar flow phenomena. They are also used downstream of flow meters to get a more accurate reading. The point is, they are only used when making measurements or when trying to achieve a certain flwo regime. How does this affect us?

I can potentially see it useful for CPU, northbridge, and some GPU heatsinks, where you're actually concerned with the dead spot in the centre.

But for intake and exhaust fans, it's a moot issue-- their role is more about the volume of airflow than where it goes.

If anything, making my rear exhaust go further and straighter, if there isn't any more CFM (and why would there be, if it's the same fan at the same RPM), would be a negative. It would mean that obstructions would have to be further from the back of the case.

Quote: Originally Posted by Hak Foo I can potentially see it useful for CPU, northbridge, and some GPU heatsinks, where you're actually concerned with the dead spot in the centre. But for intake and exhaust fans, it's a moot issue-- their role is more about the volume of airflow than where it goes.

Actually with the proximity of the mesh - it'll just exagerate the dead spot. Air exits an axial fan at around 15 degrees. That mesh just decreases the angle exiting so it'll take that much more distance.

My thought exactly.... what does this get you? It won't increase airflow... or CFM.... If anything having any restriction will decrease it.... pour 80z of water through a ring.... now that you see that flow... pour another 8oz of water through the ring, and beneath the ring have a honeycomb... 20.00 bucks says you have a splash.... which would mean not as much flow is occuring since there are restrictions on where the flow can go.

Quote: Originally Posted by lAnonymousl And your point is.....? Flow straighteners are used in wind tunnels to reduce turbulence and study laminar flow phenomena. They are also used downstream of flow meters to get a more accurate reading. The point is, they are only used when making measurements or when trying to achieve a certain flwo regime. How does this affect us?

My whole point is I wanted to give away this 1/4 inch cell size Flow Straightener, and I have. So everthing is good. I don't need to explain the physics behind this thing. I just gave one away. And if you can find a study of fluid dynamics of a flow straighter directly on an axial fan then please post it here.

The reason you're feeling less airflow (and measuring based on the anemometer data) is due to turbulent mixing in all directions once the air exits the fan. The fact is, though, this turbulence is desirable in case cooling because the laminar flow that you're advocating actually results in a much lower average heat transfer coefficient along the motherboard....and as a said before the honeycomb adds restriction, therefore causing the total volumetric flow rate to decrease even though it feels like more when holding your hand in front. If you add a foot long duct in front of the fan with and without the honeycomb and remeasure with the anemometer you'll see what I'm talking about.

No, you don't need to explain the physics behind what you're advocatig but anything posted in the forums is open to criticism, especially when it concerns products that are misrepresented.

Quote: Originally Posted by lAnonymousl The reason you're feeling less airflow (and measuring based on the anemometer data) is due to turbulent mixing in all directions once the air exits the fan. The fact is, though, this turbulence is desirable in case cooling because the laminar flow that you're advocating actually results in a much lower average heat transfer coefficient along the motherboard....and as a said before the honeycomb adds restriction, therefore causing the total volumetric flow rate to decrease even though it feels like more when holding your hand in front. If you add a foot long duct in front of the fan with and without the honeycomb and remeasure with the anemometer you'll see what I'm talking about. No, you don't need to explain the physics behind what you're advocatig but anything posted in the forums is open to criticism, especially when it concerns products that are misrepresented.

Yes, I have measured it with many different lenghts of duct. Measured the rotational flow and foreward flow. The one running on my CPU heatsink right now dropped the temps 8 degrees consistent. Now it will cool from 1/2 load to idle temp in 25 seconds compared to over 2 minutes. I will send you one and you can try it out, how's that. And then you can tell me if you feel there is applications for such a device.

Damn, can't argue with that. I would love to see the results of your testing Anonymous.

wow, Anonymous you amaze me with every post you make.

As for the honeycomb, i might try one out for kicks and giggles, seems nice, and if it doesn't work as well as planned, I'll have one et yet

I know you said you don't want to talk about the physics of your product, but the results you are posting just do not make sense.

Besides that, if something as simple as a honeycomb worked such wonders, then why hasn't anyone brought it up before. If it was so amazing, why doesn't dell use it on their systems to make them quieter (so they can use a lower rpm fan).