# Thermal Option

The thermal option in 3DEC allows the simulation of transient heat conduction. There are two separate formulations of the thermal logic. The first is a numerical formulation using the explicit or implicit finite difference method. This method is more accurate for short times, and includes thermal-mechanical fluid coupling. The second is an analytical formulation that uses superposition of point heat sources in an infinite medium. This method is suitable for long thermal times and is very fast. The comparative features of the two methods are listed below.

feature |
numerical |
analytical |
---|---|---|

thermal mechanical coupling |
yes |
yes |

thermal fluid coupling |
yes |
no |

thermal convection in fluid |
yes |
no |

temperature boundary |
yes |
no |

thermal flux boundary |
yes |
no |

thermal convection boundary |
yes |
no |

adiabatic boundary |
yes |
yes |

nonhomogeneous thermal block properties |
yes |
no |

heat sources |
yes |
yes |

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