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Started By
Message
re: Can y'all help with a simple dilution calculation
Posted on 10/19/18 at 5:57 pm to ProjectP2294
Posted on 10/19/18 at 5:57 pm to ProjectP2294
11.00 4.00
7.00 4.00
4.45 6.55
2.83 8.17
1.80 9.20
1.15 9.85
0.73 10.27
0.46 10.54
0.30 10.70
0.19 10.81
0.12 10.88 1% 99%
0.08 10.92 1% 99%
0.05 10.95 0% 100%
Does this look right?
7.00 4.00
4.45 6.55
2.83 8.17
1.80 9.20
1.15 9.85
0.73 10.27
0.46 10.54
0.30 10.70
0.19 10.81
0.12 10.88 1% 99%
0.08 10.92 1% 99%
0.05 10.95 0% 100%
Does this look right?
0
Posted on 10/19/18 at 5:58 pm to X123F45
quote:
I'm trying to figure out how many times to change the fluid in a poorly placed gearbox.
If you're able to swap fluid B in for fluid A, can't you just drain fluid A and fill it up with fluid B?
Posted on 10/19/18 at 5:59 pm to slackster
A maximum of 4 of 11 quarts at a time
Posted on 10/19/18 at 6:07 pm to X123F45
I’m no fluidologist, but it would seem that if you are achieving a homogenous mixture each time you add fluid B, you would reduce the percentage of fluid A by 36% each swap.
100% x .64 = 64 %
64% x .64 = 40.96%
40.96% x .64 = ?
etc
etc
100% x .64 = 64 %
64% x .64 = 40.96%
40.96% x .64 = ?
etc
etc
This post was edited on 10/19/18 at 6:25 pm
Posted on 10/19/18 at 6:17 pm to Rouge
I should know this. My uncle was a painter.
Posted on 10/19/18 at 6:52 pm to Tigris
Take the chicken across, then go back for the fox. Bring the chicken back to the start with you on your way to get the corn sack. Leave the chicken, bring the corn sack across and go back once more to finally bring the chicken.
Posted on 10/19/18 at 7:41 pm to X123F45
quote:
A maximum of 4 of 11 quarts at a time
I guess I don't understand the scenario. This is a real world situation. You apparently have plenty of containers with fluid B. Why can't you take 4 quarts out, take another 4 quarts out, and do it one last time so the 11 quart container is empty?
ETA - is it set up where you're pumping 4 quarts in, which is causing 4 quarts of the old stuff to drain?
This post was edited on 10/19/18 at 7:42 pm
Posted on 10/19/18 at 7:44 pm to slackster
Think OP mentioned it is a gearbox. Any chance that there is a requirement for the gearbox to stay running during this fluid-swap dance?
Posted on 10/19/18 at 7:53 pm to slackster
The box holds 7 quarts in suspension. You cannot get any more than 4 out without either an uninstall or the ability to flip 6k lbs over repeatedly.
Just can't access the secondary storage via draining or a pump.
You can drain 4. No more
Just can't access the secondary storage via draining or a pump.
You can drain 4. No more
Posted on 10/19/18 at 7:53 pm to DoctorTechnical
quote:
Think OP mentioned it is a gearbox. Any chance that there is a requirement for the gearbox to stay running during this fluid-swap dance?
Yeah, he did, but I don't understand why the gearbox must have 11 quarts in it at all time.
ETA - okay, makes sense. Thanks.
This post was edited on 10/19/18 at 7:54 pm
Posted on 10/19/18 at 7:54 pm to slackster
....it will always have at least 7. You cannot drain the last 7.
Eta. Yeah. It's annoying
Eta. Yeah. It's annoying
This post was edited on 10/19/18 at 7:56 pm
Posted on 10/19/18 at 7:59 pm to X123F45
(no message)
This post was edited on 10/19/18 at 8:00 pm
Posted on 10/19/18 at 8:22 pm to X123F45
float oldFluid = 11.0;
constant SWAPAMOUNT = 7/11;
int numSwaps = 0;
while (oldFluid / 11 > 0.1){
oldFluid *= SWAPAMOUNT;
numSwaps++;
}
print(numSwaps);
constant SWAPAMOUNT = 7/11;
int numSwaps = 0;
while (oldFluid / 11 > 0.1){
oldFluid *= SWAPAMOUNT;
numSwaps++;
}
print(numSwaps);
quote:
350
Posted on 10/19/18 at 9:12 pm to X123F45
Is there no way to siphon it?
Posted on 10/19/18 at 9:22 pm to Kimist
Posted on 10/19/18 at 9:23 pm to X123F45
Interesting problem. I am NOT a mechanic, but since the new liquid can displace the old, could you use air pressure at the fill point to force out all the fluid?
I can see this potentially causing damage to seals, causing bubbles, etc. Don't try this without the advice of a mechanic.
I can see this potentially causing damage to seals, causing bubbles, etc. Don't try this without the advice of a mechanic.
Posted on 10/19/18 at 10:03 pm to X123F45
This post was edited on 10/19/18 at 10:05 pm
Posted on 10/19/18 at 10:15 pm to X123F45
Simple dilution calculation board.
Posted on 10/19/18 at 10:16 pm to Kimist
quote:
since the new liquid can displace the old, could you use air pressure at the fill point to force out all the fluid?
You'd just get air coming out the drain.
The new liquid doesn't displace the old. It mixes with the old causing the level of the mixture to rise so the top 4 quarts can be drained again.
Posted on 10/20/18 at 12:54 am to carbon
Like monkeys writing Shakespeare, it is always a marvel what this place can produce with a little prodding 
Thank you to all.
Thank you to all.
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