On Sun, 17 Jun 2007 22:58:48 +0100, "Trimble Bracegirdle"
<no-spam@never.spam> wrote:
>Why do the Fans collect the most dust ???
>
> in my PC its like that ...I would think that all that whirring round &
>round
>
>would keep the dust off.
>
>(\__/)
>(='.'=)
>(")_(") mouse
>
Because that's what moves all the air that has dust in it?
Most of the dust doesn't get stuck in the fan, it gets blown
right through it. However once some starts to build up,
that stuck dust will catch more stuck dust. Often the dust
starts out as longer particules caught on the leading edge
of the blade and then gradually extends backwards, unless
you have an environment with a lot of sticky smoke in the
air like if you're a smoker, in a kitchen/grease, or certain
industrial settings.
"kony" <spam@spam.com> wrote in message news:nocb739rg0qurooqv3c0pp6i2kckhudf4t@4ax.com...
> On Sun, 17 Jun 2007 22:58:48 +0100, "Trimble Bracegirdle"
> <no-spam@never.spam> wrote:
>
>>Why do the Fans collect the most dust ???
>>
>> in my PC its like that ...I would think that all that whirring round &
>>round
>>
>>would keep the dust off.
>>
>>(\__/)
>>(='.'=)
>>(")_(") mouse
>>
>
>
> Because that's what moves all the air that has dust in it?
> Most of the dust doesn't get stuck in the fan, it gets blown
> right through it. However once some starts to build up,
> that stuck dust will catch more stuck dust. Often the dust
> starts out as longer particules caught on the leading edge
> of the blade and then gradually extends backwards, unless
> you have an environment with a lot of sticky smoke in the
> air like if you're a smoker, in a kitchen/grease, or certain
> industrial settings.
Also, since the air velocity along the surface of the fan
blades, at the surface of the fan blades, is zero, it takes
very little for dust particles to "stick" to the blades. Very
close to the surface of the blades there's very little wind to
blow the particles off.
On Mon, 18 Jun 2007 16:41:33 GMT, "Bob Day"
<xxxxxx@yyyyyy.com> wrote:
>Also, since the air velocity along the surface of the fan
>blades, at the surface of the fan blades, is zero, it takes
>very little for dust particles to "stick" to the blades. Very
>close to the surface of the blades there's very little wind to
>blow the particles off.
?? If that were true there would similarly be no air
velocity to cause the dust to get there in the first place.
If you are referring to boundary layers, they are not
actually zones with zero air movement, it's just slower
movement... and not even very slow when talking about an
air-moving surface a typical distance from the center
spinning at a (typical) couple thousand RPM.
On Mon, 18 Jun 2007 18:14:54 +0100, "Trimble Bracegirdle"
<no-spam@never.spam> wrote:
>Krony & Bob Day thanks your info....
>so its not about friction / static generated by the motion on plastic ?
>Mouse
>@@@
>
Yes, it is a matter of friction/static, that is a primary
factor that attracts dust, though whether it remains stuck
accumulating rapidly or falls off has much to do with the
other factors.
"kony" <spam@spam.com> wrote in message news:94hd731s688p264iuvi715is02vmcc3qr2@4ax.com...
> On Mon, 18 Jun 2007 16:41:33 GMT, "Bob Day"
> <xxxxxx@yyyyyy.com> wrote:
>
>
>>Also, since the air velocity along the surface of the fan
>>blades, at the surface of the fan blades, is zero, it takes
>>very little for dust particles to "stick" to the blades. Very
>>close to the surface of the blades there's very little wind to
>>blow the particles off.
>
>
> ?? If that were true there would similarly be no air
> velocity to cause the dust to get there in the first place.
>
> If you are referring to boundary layers, they are not
> actually zones with zero air movement, it's just slower
> movement...
Slower and slower and slower until the tangential velocity
at the surface is zero. It's why an America's Cup type
sailboat can travel into the wind -- no tangential forces on
the sail, only perpendicular forces.
Yes, the stronger the wind, the smaller the dust particles
have to be in order for them to "stick" to the fan blades --
or to furniture. It always takes a dust cloth to get that
last thin layer of dust -- blowing on it doesn't work!
There is a product crying out here to be designed n marketed (mostly
marketing).
"WONDER DUST FREE FAN SPRAY ...KEEP YOUR COMPUTERS ESSENTIAL PARTS FROM
DESTRUCTIVE DUST DEPOSITS...STOP OVERHEATING...HYGIENIC & TIDY..
ONE PUFF & DUST DARE NOT COME NEAR."
Make some Bunny a fortune ...can anybody here think of an easy-find-at-home
alternative
fan-dust-sticking-stopper ?
My current comp. CPU & Video card fans at difficult angles & the need to
take it all apart
& puff, polish, & blow every e.g.. 6 months is not fun.
(\__/)
(='.'=)
(")_(") mouse
On Tue, 19 Jun 2007 01:44:37 +0100, "Trimble Bracegirdle"
<no-spam@never.spam> wrote:
>There is a product crying out here to be designed n marketed (mostly
>marketing).
>"WONDER DUST FREE FAN SPRAY ...KEEP YOUR COMPUTERS ESSENTIAL PARTS FROM
>DESTRUCTIVE DUST DEPOSITS...STOP OVERHEATING...HYGIENIC & TIDY..
>ONE PUFF & DUST DARE NOT COME NEAR."
>
Why? The dust has to end up somewhere, might as well be on
the fan blades instead of more of it flowing through all the
nooks and crannies of the system. It would be more true for
the exhaust fans but at that point getting the dust out of
the system is still a larger obstacle than off the fan
blades. A better product would probably be "air filter" or
"room air cleaner".
"Trimble Bracegirdle" <no-spam@never.spam> wrote in message
news:4675ae9d$1_3@mk-nntp-2.news.uk.tiscali.com...
> Why do the Fans collect the most dust ???
Mine dont!
> in my PC its like that ...I would think that all that whirring round &
> round
Not the case in every PC I have encountered. Sure the fans get dusty, but
the nooks and crannies of the case and heatsinks get far dustier.
Why do the Fans collect the most dust ??? 
Linear Mode
