6.1.14 Average Enthalpy
QuickWave delivers values of enthalpy calculated separately for all lossy media (only lossy media are considered) included in the project. This feature is available for microwave heating simulations performed with the use of QW-3D and QW-BHM. The enthalpy values can be viewed in View Enthalpy window. The View Enthalpy window shows the list of media with non-zero density. Note that medium density is specified in the Project Media window of the Input Interface. Since QuickWave allows FDTD cells filled by more than one medium, ambiguity of "density" to be assigned to such cells has to be resolved. Since the criterion is, that the dielectric medium of the highest "conductivity" decides whether a cell is "dense", the density of this medium is treated as "density" of the cell. Density assigned to metallic and PEC media is ignored in this consideration. "Conductivity" is understood as the sum of X, Y, and Z components of Sigma and SigmaM. The medium of highest "conductivity" in the above sense also becomes a dominant cell medium for QW-BHM operation.
QuickWave offers two types of enthalpy value:
Volume average enthalpy density – it is calculated as a sum of products of enthalpy density in a FDTD cell and its volume, divided by an overall volume of the FDTD cells filled with a particular medium:
Total enthalpy – it is calculated as a sum of enthalpy in all FDTD cells filled with a particular medium:
Total = E1 + E2 + … +EN