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Structural & Thermal

Structural & Thermal

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  3. When doing a thermal analysis with phase change, what value of enthalpy is required? Does the thermal solver use the absolute enthalpy (H) or the relative enthalpy (H-Href)?

When doing a thermal analysis with phase change, what value of enthalpy is required? Does the thermal solver use the absolute enthalpy (H) or the relative enthalpy (H-Href)?

Tagged: 19.2, General, mechanical-apdl, structural-and-thermal, structural-mechanics, thermal, transient
    • April 5, 2023 at 2:33 pm
      FAQFAQ
      Participant

      MAPDL/Mechanical require total enthalpy. Enthalpy is temperature dependent. Material suppliers sometimes provide enthalpy vs temperature relative to some reference value (e.g., at 0oC). If relative enthalpy is provided, you must determine the reference value (Href) and add it to the relative value to obtain the total enthalpy.

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