How do pressure static fans work

[Future_Jacob]

i know there meant to be for tight spaces but i have a bit of a question with them does that work in both ways or just out if i have mine to full fresh air from the back of a radiator like in the image does it still work as intended 

[Hairless Monkey]

This is called a "pull" configuration (as opposed to a "push" configuration). And yes. It's more or less identical performance.

 

Push can perform slightly better, but pull can be easier for dust management.

[Future_Jacob]

the reason im asking is because this shows that only push has "static airflow" 

[Dogzilla07]

@Future_Jacob

 

Everything has static pressure/airflow (0 static pressure means no air is moving). The difference is the more static pressure a fan is designed to achieve the more concentrated the air is and in the shape of a cylinder, and the further it goes through obstructions. 

 

The less static pressure optimized a fan is the more the more air will be in a wider cone ( @jonnyGURU explained this nicely in the context for PSU cooling on the latest GamersNexus video).

 

The picture you linked above is just a visualization of this. When you're in pull, driving air through the radiator in that way, it still works fine, as the radiator is not very thick. (The pic below is from Techpowerup fan reviews, courtesy of VSG, who did the excellent reviews on his ThermalBench website previously)

 

[Blue4130]

10 hours ago, Future_Jacob said:

the reason im asking is because this shows that only push has "static airflow" 

That picture doesn't show static pressure. It only shows that a marketing department can use a graphic design software.

[Future_Jacob]

14 hours ago, Dogzilla07 said:

@Future_Jacob

 

Everything has static pressure/airflow (0 static pressure means no air is moving). The difference is the more static pressure a fan is designed to achieve the more concentrated the air is and in the shape of a cylinder, and the further it goes through obstructions. 

 

The less static pressure optimized a fan is the more the more air will be in a wider cone ( @jonnyGURU explained this nicely in the context for PSU cooling on the latest GamersNexus video).

 

The picture you linked above is just a visualization of this. When you're in pull, driving air through the radiator in that way, it still works fine, as the radiator is not very thick. (The pic below is from Techpowerup fan reviews, courtesy of VSG, who did the excellent reviews on his ThermalBench website previously)

 

alright i just didnt know if the force that pulls faster through radiator goes both ways 

 

[Dogzilla07]

11 hours ago, Blue4130 said:

That picture doesn't show static pressure. It only shows that a marketing department can use a graphic design software.

It's a decent visualization of what a high static pressure optimized fan does, compared to low static pressure optimized. It causes misunderstanding about what happens before the fan, It's way overdone, as in not realistic to the actual fluid behaviour of the air, but it gets the point across. Yes the air is still gonna be turbulent and flail around, but that's a marketing slide, people mistake vortices for turbulence, and assume turbulence is bad for performance, when in truth is the opposite, but you can't explain that in a single picture.

 

I do completely agree with you that having an obstruction present on the picture would be much better, and would bring greater clarity without affecting the complexity.

 

Air in a case behaves like water in hose/aquarium, air doesn't really move, temperature is imaginary and fake xD. I love absolute truths, as much as the next guy but at the end of day, a balance is needed, when even the schooling system doesn't do how stuff truthfully works until one is doing their masters and even doctorate/end-specialization in physics/chemistry/material sciences.

 

5 hours ago, Future_Jacob said:

alright i just didnt know if the force that pulls faster through radiator goes both ways 

Yeah, it's fine, as long as you don't have huge chunky radiators.

[Blue4130]

15 hours ago, Dogzilla07 said:

It's a decent visualization of what a high static pressure optimized fan does, compared to low static pressure optimized. It causes misunderstanding about what happens before the fan, It's way overdone, as in not realistic to the actual fluid behaviour of the air, but it gets the point across. Yes the air is still gonna be turbulent and flail around, but that's a marketing slide, people mistake vortices for turbulence, and assume turbulence is bad for performance, when in truth is the opposite, but you can't explain that in a single picture.

 

I do completely agree with you that having an obstruction present on the picture would be much better, and would bring greater clarity without affecting the complexity.

 

Air in a case behaves like water in hose/aquarium, air doesn't really move, temperature is imaginary and fake xD. I love absolute truths, as much as the next guy but at the end of day, a balance is needed, when even the schooling system doesn't do how stuff truthfully works until one is doing their masters and even doctorate/end-specialization in physics/chemistry/material sciences.

 

Yeah, it's fine, as long as you don't have huge chunky radiators.

How does concentric circles and three arrows merging into one arrow show high static pressure?

[thrasher_565]

23 hours ago, Future_Jacob said:

alright i just didnt know if the force that pulls faster through radiator goes both ways 

 

probably depends on fan. back then any testing was off and came to the concussion it was not worth the argument over. but gn dose have a tool to do things like that but we will have to wate.

 

the way i under stand it is it can force more air and not have so much air fly back out so the gaps of the blades are smaller. the  nosie blocker enloops are to the exstream but still think thows was marketing.