0010594: Water-covered Dwarf fell into lava and is 'drowning'

Notes
(0037833) Shonai_Dweller (reporter) 2018-02-27 01:31	Is your temperature setting turned off?

(0037838) Loci (manager) 2018-02-27 13:49	When I loaded your save (with temperature calculations enabled) your miner died from massive blood loss almost immediately.

(0037840) lethosor (manager) 2018-02-27 16:52	Same here, and when setting TEMPERATURE to NO, I saw symptoms like what you described (eventually the miner climbed out).

(0037843) ucbpaladin (reporter) 2018-02-28 18:36 edited on: 2018-02-28 20:47	The temperature setting is definitely on, and if I wait a while, the dwarf does start to take blood loss damage etc. I wouldn't have called it 'almost immediately', but that might be system-dependent, mine might run a bit (or a lot) slower than others'. I can observe the temperatures of the dwarf's possessions creeping up very slowly (in terms of ticks) before the damage occurs. At a guess, it seems possible that the specific heat of water is being used in the heat transfer equation (this value is 10x that of, say, bronze), since the dwarf's body parts and all of his possessions have a 'water covering'. As far as realism goes, the water should be almost immediately converted to steam, but I don't know off hand how 'water coverings' are treated in this case. *Edit: A short time later, a cloak with 'water covering' fell into the magma, fell several z levels and sat on the magma flow (16 deg. c, at first) for a significant period of time before being destroyed.

(0037844) Loci (manager) 2018-03-01 13:49	Interestingly, the Leidenfrost effect describes the boiling of a substance in a manner that thermally insulates. One fairly well-known example shows a man swiping his hand through liquid metal: https://giant.gfycat.com/MassivePossibleBobwhite.webm [^] But it's unlikely that the game is simulating the Leidenfrost effect. More likely it's just a case of the water not boiling away fast enough. Regarding "realistic" timespans: time is accelerated in fortress mode due to both the limitations of the hardware and the necessary pacing for players, with each tick covering 1.2 minutes. On the flip side, if you simulate a bunch of detailed temperature calculations in a "realistic" timespan you essentially end up with a much less interesting result--everything incinerates in a tick. So, in the interests of stretching the result out to a player-observable time span, temperature transfers are slower than in real life.

Issue History
Date Modified	Username	Field	Change
2018-02-26 21:43	ucbpaladin	New Issue
2018-02-27 01:31	Shonai_Dweller	Note Added: 0037833
2018-02-27 13:49	Loci	Note Added: 0037838
2018-02-27 13:49	Loci	Assigned To	=> Loci
2018-02-27 13:49	Loci	Status	new => needs feedback
2018-02-27 16:52	lethosor	Note Added: 0037840
2018-02-27 16:52	lethosor	Status	needs feedback => resolved
2018-02-27 16:52	lethosor	Resolution	open => no change required
2018-02-28 18:36	ucbpaladin	Note Added: 0037843
2018-02-28 18:36	ucbpaladin	Status	resolved => needs feedback
2018-02-28 18:36	ucbpaladin	Resolution	no change required => reopened
2018-02-28 20:47	ucbpaladin	Note Edited: 0037843	View Revisions
2018-03-01 13:49	Loci	Note Added: 0037844
2018-03-01 13:49	Loci	Status	needs feedback => acknowledged
2018-03-01 13:49	Loci	Resolution	reopened => open
2018-03-01 13:49	Loci	Summary	Dwarf fell into lava and is 'drowning' => Water-covered Dwarf fell into lava and is 'drowning'

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