Designed by Janusz Rudnicki
QuickWave
software for electromagnetic design
QW-BHM improvements
Updated: October 06, 2009
Multiple rotation and movement along arbitrary trajectories for heated objects
Improvements in time-history display of temperature and enthalpy
Improvements in time-history display of temperature and enthalpy
Improvements in time-history display of temperature and enthalpy
A standard View-Envelope function with Domain-Time displays physical quantities available in QW-Simulator versus the "electromagnetic" time being the duration of the on-going FDTD analysis. This is typically in nanosecond scale for signals in GHz frequency range and thus [ns] is used as a unit for the horizontal axis.
This scaling is inappropriate for temperature and enthalpy, since they do not change at every FDTD time step, but only at each BHM (heating) time step. Thus a new scaling of time as "heating time" or "BHM time" has been introduced for temperature and enthalpy in version 7.5. The heating time, being the horizontal scale of the display, is now set in [sec] in the corresponding Position & Parameters dialogue.
This scaling is inappropriate for temperature and enthalpy, since they do not change at every FDTD time step, but only at each BHM (heating) time step. Thus a new scaling of time as "heating time" or "BHM time" has been introduced for temperature and enthalpy in version 7.5. The heating time, being the horizontal scale of the display, is now set in [sec] in the corresponding Position & Parameters dialogue.
Resolution of the time scale is set to 0.1 sec by default and cannot be changed. Considering that the number of thermal time steps is typically much lower than the number of electromagnetic (FDTD) time steps, automatic saving options are not provided in this case. A history of temperature or enthaply can be saved to *.de3 file via Setup-Save as.. command. Heating time information is added to the standard *.de3 header.
Multiple rotation and movement along arbitrary trajectories for heated objects
In version 7.5, QW-BHM has been extended to include both rotation and translation mechanisms, of many items independently. The basic assumptions remain as in the earlier Allow rotation regime:
| • | Movement is facilitated in the xy-plane, either as rotation around an axis parallel to the z-axis or as translation along an arbitrary piece-wise linear trajectory in the xy-plane. |
| • | Each moving part may comprise lossless or lossy dielectric materials (Dielectric isotropic or Dielectric anisotropic in QW-Editor). However, it must not include metals (PEC or Metallic) since the boundaries between dielectrics and metals must not change during rotation. Rotation of dispersive media (Dielectric dispersive, Metamaterial, Ferrite) is not supported either. |
| • | Each moving part must be a separate object in the QW-Editor sense. |
