Laminar Circulation

[Jewels]

I saw that laminar word in a thread title earlier today, and it reminded me of a subject I have never seen discussed,,,on a cannabis forum.
@NotAquaMan , did you ever read the 'laminar flow' post on APC , with that psycho @Niko ?
What a circus.

There was gold in between the lines. Whenever I set a fan, it is following the strictest 'laminar fung-sway' .
To the extreme, that I went so far as to incorporat a three foot 'quarter-pipe' spanning my back wall.


Are you a flow-master , or more of a willy-nilly guy?

 

[Jewels]

These things move a ton of air. Absolutely silent. 15watts. Very quick dumpster dive. Six tin screws and a harness clip. Every refrigerator has one. I have four, and I have never salvaged a bad one.

They have no torque, so you can buff your knuckles all day long. The attrition sounds godawfulawesome, when the branches wander into the blades. Like green playing cards, clipped to my spokes.
These are hiding along the back wall, blowing forward, across the tops of the pots.

 

[jaguarlax]

I saw that laminar word in a thread title earlier today, and it reminded me of a subject I have never seen discussed,,,on a cannabis forum.
@NotAquaMan , did you ever read the 'laminar flow' post on APC , with that psycho @Niko ?
What a circus.

There was gold in between the lines. Whenever I set a fan, it is following the strictest 'laminar fung-sway' .
To the extreme, that I went so far as to incorporat a three foot 'quarter-pipe' spanning my back wall.
View attachment 9962

Are you a flow-master , or more of a willy-nilly guy?

I have a similar pattern but I send my warm air up and out through the top, while I bring in fresh from the bottom through the rootzone and up...

 

[Dirtbag]

Super important to have solid airflow all around the plants.

My room is weird because I dont have a lung room so I cant put the air under the plants, especially in the winter.
Incoming air is directed between the canopy and the lights, as are 2 circulation fans pointed slightly upward. Then I draw air from near the intake, duct it into the header house(different room) through a charcoal filter and deliver it back to the floor of the flower room. Between that and leaving an air gap between the canopy and the wall I get good air flow going upwards through the canopy, and decent laminar flow across the canopy preventing the hot air from the lights going down.

 

[Jewels]

I often see fans pointed at fans.
Would stand to reason that multiples fan's synergy, working together, could accomplish more than the sum of their cfm's.
I may go so far to say that a fan could potentially 'cancel' another fan.

 

[Fr3nzy]

This is key, air movement solved my rh spiking. Ended up blowing 2 fans to back wall then fan in front of plants to push back to make a circular motion. Love the half pipe idea on top back wall.

 

[Gweedo's Growroom]

I a firm believer in having target airflow instead of just moving it around Willy nilly, I've got my intake filter for the room at the bottom of the door, cool air comes through the inlet filter low, once in the room I have a tower fan in the SW corner blowing along the wall towards my air purifier in the SE corner, that sends it up, then in the ne corner I have a stand circulating ran pointed back at the door, but it's hung upside down from the cieling, the extraction fan is in the cieling centered above the lights pretty much, so if you were above my room looking down I'd have pretty fast counter clockwise movement but also an upward rotation towards the extraction fan, basically a tornado lol but like stated above it helps tremendously with rh spikes and deadspots in lower canopy where pm loves to rear it's ugly face, once I implemented this style of air movement I haven't had a single pm or fungus gnat issue at all, both issues I've fought in past grows, but there was no real thought put into how I had my air moving before, I just knew it was being moved lol, sorry for the long winded post but I feel this is an extremely relevant issue for us indoor guys ??????

 

[Fr3nzy]

This being my first grow I havnt experienced any mold yet ( knock on wood) but for rh it's a must. I also have a slight negative pressure. yes I have intake low pulling air in around the concrete floor. Floor temps havnt exceeded 65 yet. Rafter temp yesterday was well over 100 assuming the rh up top is insanely high. R38 insulation hasnt failed the room yet lol I'm happy I ended up pulling air from inside rather then outside. Even though garage isnt climate controlled low air is much cooler inside then outside. When I moved into this place a few years ago i went to all wood heat and it learned me something about air flow lol.

 

[Blackbeard]

Well this kept me busy for like 20 minutes, hows my air flow fung sway?
Oh and that's supposed to be a '?' up the back wall of tent, the more I looked at it, the more I thought people would think I was just detailing some "thing" in the tent. So I added an arrow with a 'Q' to indicate it was a Question mark. But then the Q stopped looking like a Q and more like some other "thing" behind my tent

-BB

 

[Jewels]

Keep in mind that we are trying to create mass movement counter to Natural flow. Ultimately we are trying to avoid stratification. Cold air will settle unless forced up.
Hot air will pool up top - unless forced down.
There is wisdom in your diagram in that the hot air escaping will naturally be replaced by the air below.

This is the stratification that we want to avoid.

Also, your little orange guy appeared to be having a lot of fun so I thought I would try and whip out a backflip.

 

[Lockedin]

Keep in mind that we are trying to create mass movement counter to Natural flow. Ultimately we are trying to avoid stratification. Cold air will settle unless forced up.
Hot air will pool up top - unless forced down.
There is wisdom in your diagram in that the hot air escaping will naturally be replaced by the air below.

This is the stratification that we want to avoid.
View attachment 34200
Also, your little orange guy appeared to be having a lot of fun so I thought I would try and whip out a backflip.

Old thread I know, but this is my current circulation scheme:
Bottom - 4" cheapo inline fan placed by intakes - moves cool air under the pallet below plants to the back of the tent.
6" Clip fan above the inline - pushes air across the top of the canopy towards the back of the tent.
6" Clip fan in back of tent (same plane as the other 6" Clip fan) - directed straight up to direct air towards ceiling
6" AC Infinity T6 - mounted as high as possible, inlet in center of ceiling - exhausts warm air out ceiling, and vacuum pulls cool air through intakes.

By doing this, the hygrometer sitting on top of one of my lights reads 2f above the sensor on the canopy.