Most PC fans produce a varying amount of pressure depending on where in the cross-section of the airflow cone you measure, and it decreases as you move away from the fan. A lot of the fans I've looked at in my inventory produce far more pressure at the edge of the cone and at the stated SP. Others produce less than the specs say, but some may have a more equal distribution of SP, resulting in an overall SP measurement that is higher than perceived using a crude measurement tool (paper, hand, trap, etc.).
Manual manometers (pressure meters), whether it's a tube full of water, pitot, etc. measure within a chamber or dual chamber and capture the total pressure without differentiating where most of the pressure is flowing within the cross-section. Digital manometers do the same thing, but with greater precision. If they're good quality, they're also more accurate.
Is there a device that can measure the static pressure of the cross-section of a fan's airflow cone's radius at multiple points instead of the overall pressure of the entire cone?
How wide of a radius can it handle? That will determine how far it can be moved away from the fan to determine how far out the fan is pushing the air with significant pressure.
What would be the best sensor to measure SP? Pressure transducer? Another type of very sensitive physical pressure sensors?
Maybe you're asking if this even matters. It can. If most of the pressure is only at the edge of the cone, that means that the the cooling effect is restricted mostly to that circumference. Here are my thoughts. What do you think?
- Pulling through a dust filter, more dust will build up around the circumference, creating an increasing barrier to airflow.
- Pulling through a heatsink or radiator, points of low pressure don't cool off as much.
- The heatpipes running through a heatsink may or may not be adversely affect the condensation of the fluid.
- Water pipes running through the radiator will get better or worse cooling depending on how long they're in contact with the greatest amount of airflow at the highest pressure. How fast the water flows also matters, but is still reliant on the cool air.
- I would guess that high pressure would decrease dust buildup in those areas (barring the presence of something that would collect dust, like a barrier, or fluid like oil), but I'm not sure.
- It seems that if you're just going for cheap fans without much pressure, it isn't going to make much difference since the entire cone is weak.
Edited by RevGAM, 29 June 2024 - 07:26 AM.
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