So...some improvements i think ...Now the heat is created by the fluid itself .The hot core is wrapped by a cold coat at the birth.
Then , the velocity of the hot core drive the cooling constraint (thickness of the cold lava), in Hawaii for exemple , the lava
is slow because of the gentle slope .In this test,the lava flow become auto directed and ....out of control, creating his own path and shape.
The materials are allocated by the naiad temperature including a SSS just before the coldest part.
Max-Vray-18 M particles at the end , Mesh with frost.

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