Flow analysis of a dry cell

[Zymosan]

I figured I'd put this on a new thread and not thread-jack boyntons one.

I ran my dry cell through solidworks flo simulation.
Just so you have a basic idea, it has 38 20 gauge plates, and 1/16 thick buytl rubber gaskets. The size of the holes are .565.

I have holes at the bottom and top of my plates, all in line.
But when I ran the sim., at 1 GPM inlet and flowing out to atmospheric pressure, the water just shot across the bottom holes to the opposite end plate and then up that last plate. Some water did go in b/t the plates near the inlet, but not much.

Those of you w/ clear end plates, can you see the water flowing up either of those plates against the end pieces?
Would water flowing up a plate help to dislodge some bubbles?

The first picture is my original config. w/ all the holes lined up. The second pic has the holes rotated 90 deg. so no two holes line up.

[BoyntonStu]

Zymosan,


Excellent work!

I would appreciate it if you can simulate the following:

1> 15 plates with a single 0.25 hole at the top and which each plate's hole alternates left/right/left....

2> Same as 1 but with the end plate having its single hole on its bottom.


Thanks,

BoyntonStu

[Zymosan]

Will do. I ran that one with the freebie version that came with solidworks. When I get the full blown version up and working I'll put yours into that one.
The full blown version takes gravity into account, which will be usefull for yours.
I'll need some dimensions on your plates and the size of the gap in b/t them.

[Boltazar]

I think its important to realize that the water is not pumped through the cell. The water is sucked through as the gas escapes bringing/pushing some water with it. There is no pump just gravity and what ever movement is made by the gasses escaping.

[Zymosan]

I know they pump themselves, but I went ahead and put a modified fuel pump on mine.
When I rotated the plates with the holes at 90deg to each other and disconnected the pump, the water just trickled out of the dry cell.
May have been to much to pump through all on it's own.

[BoyntonStu]

Will do. I ran that one with the freebie version that came with solidworks. When I get the full blown version up and working I'll put yours into that one.
The full blown version takes gravity into account, which will be usefull for yours.
I'll need some dimensions on your plates and the size of the gap in b/t them.

Great!

Please try 3 wide x 6 high plates (14 cells deep) with 0.025 and 0.050
spacings.


Assume a 14" head pressure feeding a top 0.25 hole, and next a 20" head feeding the same diameter bottom hole.

If the model performs poorly please try increasing the hole diameter to 0.5 and see if it helps.

BTW I am designing a 6" high x 12" wide Giant Amoeba Cell.

Is "Giant Amoeba" an oxymoron like Jumbo Shrimp?

Thanks for your contributions.

BoyntonStu

[Zymosan]

So you really have 15 total plates correct?
A few more dimensions needed here, so picky are these computers.

How thick are your plates?
How wide are your gaskets? Should I cover 1/4" all the way around?
Where do you want the hole? To one side, then staggered left/right/left?

I think giant amoeba works. Like calling a big guy tiny.

[Zymosan]

Another question.
Do you think it is correct to put the output of the flow test at atmospheric pressure? That's pretty much like pumping the water out of the cell onto the ground.

In the freebie version of the flow sim. you have to define either the inlet or the outlet w/ a pressure. Say 10psi.
The other side of the flow is either a mass flow rate, pounds per second , or a volume flow rate, cubic feet per second.

It's been so long since I've worked w/ the full blown version I can't remember what you have to input.

[BoyntonStu]

So you really have 15 total plates correct?
A few more dimensions needed here, so picky are these computers.

How thick are your plates?
How wide are your gaskets? Should I cover 1/4" all the way around?
Where do you want the hole? To one side, then staggered left/right/left?

I think giant amoeba works. Like calling a big guy tiny.

Hi,

The inputs requested are important, not picky.

15 total plates #20 gauge 0.0375"

Yes, 1/4" wide perimeter gasket.

Exactly correct. To one side, then staggered left/right/left.

Output head pressure should be the bubbler height ~ 12" plus an indeterminate pressure caused by the output lifting some liquid back to the reservoir.

The Amoeba Cell output can fill a hard to blow by mouth balloon.

I guess a few psi.

Output head pressure? Your guess is probably better than mine.

Anything else needed to analyze the Amoeba Cell?

Godzilla watch out! The giant Amoeba is coming to gobble you up.

Thanks,

BoyntonStu

[Zymosan]

Stu, I was wondering where do you want the input/output holes on your end plates? In the middle of the end piece or off to one side like the plates?