Why do the Fans collect the most dust ???

"kony" <spam RemoveThis @spam.com> wrote in message news:nocb739rg0qurooqv3c0pp6i2kckhudf4t@4ax.com...
> On Sun, 17 Jun 2007 22:58:48 +0100, "Trimble Bracegirdle"
> <no-spam RemoveThis @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.

-- Bob Day
http://bobday.vze.com
 >> Stay informed about: Why do the Fans collect the most dust ??? 

On Mon, 18 Jun 2007 16:41:33 GMT, "Bob Day"
<xxxxxx.RemoveThis@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.
 >> Stay informed about: Why do the Fans collect the most dust ??? 

"kony" <spam DeleteThis @spam.com> wrote in message news:94hd731s688p264iuvi715is02vmcc3qr2@4ax.com...
> On Mon, 18 Jun 2007 16:41:33 GMT, "Bob Day"
> <xxxxxx DeleteThis @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!

-- Bob Day
 >> Stay informed about: Why do the Fans collect the most dust ??? 

Krony & Bob Day thanks your info....
so its not about friction / static generated by the motion on plastic ?
Mouse
@@@
 >> Stay informed about: Why do the Fans collect the most dust ??? 

On Mon, 18 Jun 2007 18:14:54 +0100, "Trimble Bracegirdle"
<no-spam.DeleteThis@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.
 >> Stay informed about: Why do the Fans collect the most dust ??? 

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
 >> Stay informed about: Why do the Fans collect the most dust ??? 

On Tue, 19 Jun 2007 01:44:37 +0100, "Trimble Bracegirdle"
<no-spam.DeleteThis@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".
 >> Stay informed about: Why do the Fans collect the most dust ??? 

"Trimble Bracegirdle" <no-spam DeleteThis @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.
 >> Stay informed about: Why do the Fans collect the most dust ??? 

Lovely me again.
It is so that I permanently have the sides off my Home comps which are sat
up in corner of
my admittedly infrequently dusted / vacuumed home ...
Tho dusting n vacuuming n cleaning would stir up dust & be the worse.
Anyway my 3 1/2 year old P4 only has dust on the CPU fan
& Radeon 9800 Graphic cards Fan..
There is a little covering on other of those exposed components but not much
...the PSU's fan
doesn't seem to have collected any.
That P4 has the Intel stock heating / fan & recently I was amazed at the
amount of dust n muck I
dug out of it ...but as I say little elsewhere.
Perhaps my issue here (inspiration !) is not DUST but FLUFF ??
(\__/)
(='.'=) This is Bunny. Copy and paste Bunny into your
(")_(") signature to help him gain world domination.
 >> Stay informed about: Why do the Fans collect the most dust ??? 

On Wed, 20 Jun 2007 02:06:10 +0100, "Trimble Bracegirdle"
<no-spam DeleteThis @never.spam> wrote:

>Lovely me again.
>It is so that I permanently have the sides off my Home comps which are sat
>up in corner of
>my admittedly infrequently dusted / vacuumed home ...
>Tho dusting n vacuuming n cleaning would stir up dust & be the worse.
>Anyway my 3 1/2 year old P4 only has dust on the CPU fan
>& Radeon 9800 Graphic cards Fan..
>There is a little covering on other of those exposed components but not much
>..the PSU's fan
>doesn't seem to have collected any.
>That P4 has the Intel stock heating / fan & recently I was amazed at the
>amount of dust n muck I
>dug out of it ...but as I say little elsewhere.
>Perhaps my issue here (inspiration !) is not DUST but FLUFF ??
>(\__/)
>(='.'=) This is Bunny. Copy and paste Bunny into your
>(")_(") signature to help him gain world domination.
>


Why is it you have such problems with doing routine things?

It's real simple. Unless someone has a properly designed,
filtered intake on their case, they're going to have to
periodically open it and clean the dust out. That period
depends on how dusty the environement and how much margin
the least-well-cooled part(s) have.

There is no point in marvelling over the basics of why dust
sticks, just clean it out and be done already. If you find
the rate at which dust builds up to be excessive, you might
also consider a room air cleaner, it will be kinder to
_your_ air passages and lungs as well as areas in a
computer.
 >> Stay informed about: Why do the Fans collect the most dust ??? 

Mr. Kony authoritatively informs Lovely me """There is no point in marveling
over the basics of why dust sticks, just clean it out and be done already"""

Buts its not quite that easy /...My main worry here is for my newish
Core2Due & Geforce 8800 GTX.
The Arctic Cooler Fan on the CPU & the way the 8800's built & fits in the
case means I have to remove them completely from the case to clean ...
Which will then involve unscrewing the 8800's case top to get the dust out.

Taking the CPU's Heatsink /Fan off will mean (possibly) taking out the whole
motherboard ...
IF ! the thing has not heat welded itself to the CPU's surface I will need
to clean & replace the
thermal compound ..
"""...just clean it out and be done already""" is not goin to be so easy.
(\__/)
(='.'=)
(")_(") mouse
 >> Stay informed about: Why do the Fans collect the most dust ??? 

On Thu, 21 Jun 2007 02:43:45 +0100, "Trimble Bracegirdle"
<no-spam.DeleteThis@never.spam> wrote:

>Mr. Kony authoritatively informs Lovely me """There is no point in marveling
>over the basics of why dust sticks, just clean it out and be done already"""
>
>Buts its not quite that easy /...My main worry here is for my newish
>Core2Due & Geforce 8800 GTX.

.... which makes no difference whatsoever, it's the same dust
you'd have sticking to some other CPU or video card, and
cleaning it off is, amazingly, the same process too.



>The Arctic Cooler Fan on the CPU & the way the 8800's built & fits in the
>case means I have to remove them completely from the case to clean ...

Ok, you have to take the video card out... and how is this
different than what someone else has to do?

If it really bothers you to have a heatsink and fan for the
CPU that are oriented sideways, think about that next time
but really it is not a big deal. If all else fails, take a
small art brush and if you find it too long to fit, cut the
handle off midway so it's shorter and more maneuverable.
It's really not a big deal to get dust off, but if you
wanted to add a filtration system, just do that instead (but
as I'd mentioned previously, a room air cleaner would go a
long way towards reducing whole room dust level which has
benefits beyond just the PC.



>Which will then involve unscrewing the 8800's case top to get the dust out.

So? Again this is not unlike many other cards.



>
>Taking the CPU's Heatsink /Fan off will mean (possibly) taking out the whole
>motherboard ...

If you really can't do it yourself without making it out to
be a problem, take it to a shop and pay them to clean it.
Amazingly, other people manage.



>IF ! the thing has not heat welded itself to the CPU's surface I will need
>to clean & replace the
>thermal compound ..

I guess it's time to buy a new PC then... be sure to donate
your present one to someone needy, I'm sure they'd be glad
to clean the dust out when necessary.
 >> Stay informed about: Why do the Fans collect the most dust ??? 

Trimble Bracegirdle wrote:
>
> Why do the Fans collect the most dust ???

Because they are the first devices to encounter the dust, thus the dust
sticks to them, especially if there are smokers in the house.

--
http://www.bootdisk.com/
 >> Stay informed about: Why do the Fans collect the most dust ???