I got a revelation and just want to bounce the idea off of you guys to see what you think. The idea is to have A single 120mm fan cool everything (minus the power supply and gfx card for now). It's not too far fetched considering I have a shuttle and right now it uses dual 80mm instead of one 120. The plan is to put the 120mm fan in front and then funnel it using some molded plexi to the heatsink in the back. The problem being that the rest of the components will have virtually no airflow. So, I thought because the air in the funnel should be lower pressure due to it flowing faster, than with holes in the funnel, it should suck up the surrounding air. Check out my diagram: What do you guys think? Anyone studying aerodynamics and have insight? I'm currently worried about how fast will the air have to be moving to create good enough airflow to cool the ram and chipset. Will increasing the amount of holes help?
blue representing tube, yes. Will it have holde of vents in it?? I presume it must have, seems like it could work, tho i dont know how much of a pressure diferenct you will create in the real world.
Well, you would have to create the high-pressure environment in the first place, and AFAIK the only way to do that is to place fans with a combined CFM rating of more than the exhaust in the rest of the case, therefore the design is fundamentally flawed. Sorry to rain on your parade.
As i see it, it could theoretically work if the fan was feeding into a funnel like construction, but that would require something with an extreme air velocity, and nothing blocking the exhaust to create suction... That would sound like a jet taking off, and would possibly have the same effect (computer flying away). What you are trying here is something like a car pulled along the ground by a helicopter, you're better off just driving the car instead. You're simply better off just using a conventional fan cooling setup.
IMO, I wouldn't think so. As long as the air in the tube is lower pressure, than the air around it is by definition higher pressure. The diagram is mislabled, thats my fault. But, have you ever done the experiement of using a blower to blow across the top of a container with packing peanuts or something light inside? The air pressure change caused by the blower causes the packing peanuts to "magically" fly out of the container. Is there something I'm missing from the experiment that would cause problems with my setup? I just modified the diagram, I think you are misunderstanding "suction," again thats my fault, wrong word choice. It's not persay "sucking the air out" it's just simply high pressure air going from high pressure area to low pressure area. It's seeking balance just like heat goes to cooler place or water in a towel will disperse to the surrounding dry places.
You're trying to use the Bernoulli effect to suck air into the "flow zone" through holes? Normally this would work (albeit with a fairly low airflow) but the fact that you've got resistance at the end of your funnel (heatsink) means the pressure inside this pipe will actually be higher than the rest of the case, rather than lower. You'll still get airflow but it'll be in the opposite direction. Should still work, as long as your 120mm fan shunts enough air.
Silverstone did something kinda like this: Not the same thing, but the front>back duct with 2 120's. Not sure how much it helped, but it looked pretty
