Mined abyssalite doesn't warm up ?

[Gouflax]

Hello,

While working on an abyssalite melter, i noticed that mined abyssabile's temperature doesn't move. Wild abyssalite, when in contact with a hot material, warm up.

Anybody know why ?

[RageLeague]

Supposedly, it has a thermal conductivity of 0, so normally it shouldn't transfer heat. Not sure how it got heat up while in a natural tile form, though.

[ghkbrew]

It's because of the formulas for heat transfer:

https://oxygennotincluded.fandom.com/wiki/Thermal_Conductivity

The effective thermal conductivity (TC) for a given interaction is based on the TC of both materials. (the constant k in the above link).  But different types of thermal interactions use different methods of combining the two materials' thermal conductivity. 

When debris interacts with a tile the effective thermal conductivity is minimum of the two materials TC's.  So on the left it will be abyssalite's TC of 0.00001 (it's not actually 0, they round it for display). And it will take approximately forever for the abyssalite to warm up.

When two tiles interact the effective TC is the geometric mean.  So on right the effective TC will be the geometric mean of 0.00001 and 80 (TC of steel) = sqrt(0.00001 * 80) = 0.02828427.   A little less than 3000x faster than on the left.