Left-to-Right Liquid Flow Heat Transfer Bug

Just to add a bit of clarification that probably isn't needed, that erroneous 40kg in the bottom right of the screenshot is precisely 300.4C when it really should be precisely 300.375C. There is no conduction between cells due to the low temperature difference. Resulting temperatures are just a result of liquid flowing from the 80kg cell to the 40kg cell. 10kg of 300C should combine with 30kg of 300.5C to produce 40kg of 300.375C. This is indeed what happens on leftwards flow, but not rightwards.

Thanks for the info, we're looking into this.

Small note: you're using C for 300+ values, when I believe you intend to use K.
(Water at 300C immediately becomes steam )

1 hour ago, klei.ruby said:

you're using C for 300+ values, when I believe you intend to use K.

Ouch. You got me.

it seems to be a simple incorrect mass in the weighted average formula. Thanks for the quick reply. 

Minor update: I've got a tentative fix that we're testing locally.
It makes left/right flow calculations consistent, but it may have other side effects (as you'd imagine).

16 minutes ago, klei.ruby said:

it may have other side effects (as you'd imagine).

Of course. One tiny change can snowball out of control (and then metal doors start dropping free blobs of metal on each open/close).  

I hope this was enough to isolate and find everything.  Cheers. 

Minor update #2: there were indeed side effects... liquid grew in mass every time it flowed A small pocket of liquid would go on to flood an entire base.

While the cause of the temperature discrepancy is now known, the behaviour needs more time to isolate a fix without side effects, given how the logic works.

50 minutes ago, klei.ruby said:

A small pocket of liquid would go on to flood an entire base.

Fun times.   A mass duplication device would not be wanted.  The current system allows for amplification of either heat or cold (the greater the delta, the more the magnification), but mass creation that would flood an entire base is definitely worse. 

Changed Status to Known Issue

The same bug appears in gas flow computations.

 

Could the debri stacking bug (discovered by @Blazing Falken and discussed here) be related.  These are all bugs related to an incorrect mass showing up in heat computations (the old mass lingers and gets used incorrectly). Here is a link to the thread where I was playing with this thought.  

Hello, this is an old bug, but it's still active, at least on vanilla, as I recently discovered when testing various heat exchangers design. Some left-to-right designs perform half as well as a mirrored right-to-left design, which is huge.

Is there any update on this bug?

Edited May 2, 2021 by Fradow

Here is a direct link to an aquatuner setup that will either heat or cool things, utilizing this bug. The link in the text works.  Another bug is on the forums, namely that it removes the "/page/6/" from the code below, so it won't point to the right spot.