Zalman's CNPS11X Extreme Gets V-Shape Design

[exfileme]

Zalman's new CNPS11X Extreme features a custom heatpipe and a V-shaped dual heatsink design.

Zalman's CNPS11X Extreme Gets V-Shape Design : Read more

 

[blackjellognomes]

Why would a typical air cooler's shape create more turbulence? Air flows between the fins, not directly against them; there shouldn't be turbulence in the first place. Seems like a gimmick.

 

[greenrider02]

looks sweet. I love Zalman

 

[amk09]

I'll believe it when I see comparisons against other top coolers.

 

[kcorp2003]

You'll think heatsink creation will reach its limits by now or 5 years. spend $50 more for 1 or 3 degree's cooler than yours. while your CPU can operate well under yours.

 

[gsacks]

[citation][nom]blackjellognomes[/nom]Why would a typical air cooler's shape create more turbulence? Air flows between the fins, not directly against them; there shouldn't be turbulence in the first place. Seems like a gimmick.[/citation]

All surfaces generate friction. Air traveling horizontally across the surface of the fin creates friction, which (I think) would generate turbulence. The shaping of the fins in the picture appears to lessen the amount of time that the air is blowing across the fins at the edges, so that should reduce turbulence. Of course, it has been over 20 years since I took a physics course, so I could be totally wrong. But I think that is what is going on.

 

[eddieroolz]

Looks nice, but I thought it would be a V design like a V engine

 

[JamesSneed]

I suspect this works like an airfoil. The air on the outside of the "V" is going faster due to less resistance because there is less fin surface to cause friction. The air to the middle of the "V" is moving the slowest since there is more fin suface to pass over. Im guessing here but the faster air should move towards the slower moving air due to the small pressure drop which would cause more air to pass over the back part of the "V" to achive more cooling with a given CFM fan.

 

[aaron88_7]

Hey Tom's, since we are about to have a whole new socket from Intel with a new chip architecture released onto the wild in a few days now, could we perhaps get you guys to do an updated review of some popular CPU fans? Perhaps with a few tested on some of those overclocked Sandy bridge k series chips?

If you did, that would be muy bueno!

 

[joelmartinez]

I thumbs up that muchas veces (sorry I'm too white)

 

[techcurious]

[citation][nom]blackjellognomes[/nom]Why would a typical air cooler's shape create more turbulence?[/citation]

Turbulence (and noise) occurs when ever any forces act on air to move or redirect it. Thats why the spinning fins of the fan are curved, to reduce this effect by making the redirection of air smoother. But when the air is blown out the other side of the fan, it is blown out in a spiral, not straight and perpendicular to the fan. And most heatsinks (if not all) have their cooling fins arranged perpendicular to the fan. So this causes another redirection of the air flow between the fins. And that causes most of the turbulence noise in my opinion, especially at higher fan speeds. I bet if the heatsink fins were designed with a curve at the side facing the fan, to gradually redirect the air flow, we would have even quieter coolers But I guess it would cost too much to make such curved fins?

 

[Lutfij]

[citation][nom]techcurious[/nom]Turbulence (and noise) occurs when ever any forces act on air to move or redirect it. Thats why the spinning fins of the fan are curved, to reduce this effect by making the redirection of air smoother. But when the air is blown out the other side of the fan, it is blown out in a spiral, not straight and perpendicular to the fan. And most heatsinks (if not all) have their cooling fins arranged perpendicular to the fan. So this causes another redirection of the air flow between the fins. And that causes most of the turbulence noise in my opinion, especially at higher fan speeds. I bet if the heatsink fins were designed with a curve at the side facing the fan, to gradually redirect the air flow, we would have even quieter coolers But I guess it would cost too much to make such curved fins?[/citation] in physics, the more you curve/bend the blades the more ressitance the fans encounter. The whirring sound thats made by the fans is cos of the blades trying to cut through the air in front of it and push it along the back. So yeah, it'd relate to higher costs to us, the end consumer.

[citation][nom]jamessneed[/nom]I suspect this works like an airfoil. The air on the outside of the "V" is going faster due to less resistance because there is less fin surface to cause friction. The air to the middle of the "V" is moving the slowest since there is more fin suface to pass over. Im guessing here but the faster air should move towards the slower moving air due to the small pressure drop which would cause more air to pass over the back part of the "V" to achive more cooling with a given CFM fan.[/citation]

The "V" shape is a dud idea, as the deadzone of the fan is the center of the fan where there is no air flowing through it. The air is however moved in a circular motion but due to the perpendicular fin array, the air flow is hampered. Instead of all these fin arrays, they should look up fan shrouds to help make a tunnel effect and get better air flow.

 

[alyoshka]

Really cool looking......it's a good way to save metals and the earth, so it's a step greener and plus if it cools as well as the earlier models..... better....
I guess, everyone happens to be pointing out the paper knowledge of their's....
Practically, I believe the company ain't full of fools to launch and inefficient HS certainly not one of the leading companies.
The fan the dead zone and what not seems to be discussed here, what you forget with the beauty of physics is that heat spreads onto the metal fins thus creating a negative pressure where the V shaped center is, causing and inward rush of cool air.... a sort of inverted mushroom.....
Easier to visualize I guess......
Looking forward to trying it out I guess....

 

[JamesSneed]

^ Negative air pressure. Thats what I said. The fans dead zone is compensated for in this design. Simple and I bet pretty efective.

 

[wolfram23]

Wow cool. I wonder how it compares to the CNPS10X Extreme, which I've been thoroughly impressed with for a single fan heatsink.

 

[hardcore_gamer]

I dont see any advantages with this type of design.:S.looks cool..thats all

 

[meuchel]

[citation][nom]eddieroolz[/nom]Looks nice, but I thought it would be a V design like a V engine[/citation]
kinda looks like a small block with the fan on top like a super charger

 

[ewood]

[citation][nom]Lutfij[/nom]in physics, the more you curve/bend the blades the more ressitance the fans encounter. The whirring sound thats made by the fans is cos of the blades trying to cut through the air in front of it and push it along the back. So yeah, it'd relate to higher costs to us, the end consumer.The "V" shape is a dud idea, as the deadzone of the fan is the center of the fan where there is no air flowing through it. The air is however moved in a circular motion but due to the perpendicular fin array, the air flow is hampered. Instead of all these fin arrays, they should look up fan shrouds to help make a tunnel effect and get better air flow.[/citation]

turbulence is[citation][nom]techcurious[/nom]Turbulence (and noise) occurs when ever any forces act on air to move or redirect it. Thats why the spinning fins of the fan are curved, to reduce this effect by making the redirection of air smoother. But when the air is blown out the other side of the fan, it is blown out in a spiral, not straight and perpendicular to the fan. And most heatsinks (if not all) have their cooling fins arranged perpendicular to the fan. So this causes another redirection of the air flow between the fins. And that causes most of the turbulence noise in my opinion, especially at higher fan speeds. I bet if the heatsink fins were designed with a curve at the side facing the fan, to gradually redirect the air flow, we would have even quieter coolers But I guess it would cost too much to make such curved fins?[/citation]

and it would be less effective. a turbulent flow over the fins is significantly more effective at removing heat. as the flow goes turbulent the thermal profile in the flow becomes linear due to mixing from the vortices. in a laminar flow the air directly between fins can only be heater by conduction which is a lot less effective than heating by convection. one of the first things you figure out in fluids and heat transfer is that loud heat sinks work much better but people would never tolerate the noise

 

[blackjellognomes]

[citation][nom]gsacks[/nom]The shaping of the fins in the picture appears to lessen the amount of time that the air is blowing across the fins at the edges, so that should reduce turbulence.[/citation]Less surface area means that less air will be helping dissipate the heat. And if ewood is correct, less turbulence also means less effective cooling.

[citation][nom]jamessneed[/nom]I suspect this works like an airfoil. The air on the outside of the "V" is going faster due to less resistance because there is less fin surface to cause friction. The air to the middle of the "V" is moving the slowest since there is more fin suface to pass over. Im guessing here but the faster air should move towards the slower moving air due to the small pressure drop which would cause more air to pass over the back part of the "V" to achive more cooling with a given CFM fan.[/citation]If the air is moving faster on the outside of the "V", that would create positive pressure at the center. The air from the center would move outward, not the other way around (perhaps Zalman wanted to eliminate the dead zone?). From what I understand, this would disturb airflow and create turbulence *behind* the heatsink, where it can't even help with heat dissipation.

 

[AstroTC]

why are you guys even debating this? I dnt think they would put this out if they havent done their own research and testing -.- I think its good looking and im looking forward to seeing how it performs.

 

[jimishtar]

scythe has already done this design, right?

 

[jerreece]

[citation][nom]blackjellognomes[/nom]Why would a typical air cooler's shape create more turbulence? Air flows between the fins, not directly against them; there shouldn't be turbulence in the first place. Seems like a gimmick.[/citation]

I'm sure it has to do with aerodynamics and "drag" factors. This is why cars, race-cars, and airplanes are tested in "wind tunnels".