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Thermal Loss Distribution OverviewThermal loss distributions are computed from electromagnetic fields or particle losses and link the thermal solver to other CST STUDIO SUITE solvers. In principal a thermal computation can be don within the electromagnetic- / particle-project or in a separate project. The thermal loss distribution is always mapped to the grid of thermal solver and is added to the 2D / 3D Results tree folder during the simulation process.
Single project coupling If both the electromagnetic field solver and the thermal solver are based on a hexahedral grid, it is possible to carry out both computations within a single project. This type of coupling allows to do parameter sweep and optimizations of a coupled thermal simulation. The workflow to link in the thermal solver is as follows:
The thermal loss distribution is calculated automatically right before the thermal solver starts.
Two projects coupling If the meshes of the primary solver an the thermal solver should be different, two different projects need to be connected. The workflow is as follows:
This workflow requires to compute the thermal loss distributions manually or via postprocessing template after the electromagnetic- or particle-simulation has been finished.
Creating simulation tasks Another possibility to perform parameter sweep and optimizations of a coupled thermal simulation is to create multiple simulation project simulation tasks in DESIGN STUDIO and couple them in the way described in the previous section.
For more information please refer to CST DESIGN STUDIO help.
Field Monitors Some electromagnetic solvers require to define field monitors in order to store the electromagnetic fields for a subsequent thermal loss calculation. The following table gives an overview which monitors deliver usable results:
Note: Power loss densities are created by an interpolation from field results. Since the discrete representation of these losses is not located where the thermal solver needs it, a second interpolation is necessary. To avoid inaccuracies it is always advisable to use electric or current density monitors for the thermal loss distribution calculation instead of power loss densities if possible. Tetrahedral solvers only support the linkage with power loss densities to the thermal solver.
Loss Interpolation
Transferring losses from EM- or Particle solvers to thermal solvers involves at least one interpolation step. In addition the loss distribution is a secondary result in any EM- / Particle-solver which means that an electric field, a magnetic field or a particle movement is evaluated to create the loss distribution. Summing up the following sequence of steps is performed to create a loss distribution which can be used by a thermal solver:
Especially during the steps 3 and 4 the total amount of loss power can be reduced compared to the value after step 2 was finished. There a various reasons why this happens and often this is intended by the user. The following factors can reduce the total amount of loss power:
It is very important for an accurate thermal simulation that the total amount of losses is transferred to the thermal solver correctly. Please check these values in the "Heat Flow Values" after the simulation was finished.
See also: Thermal Stationary Solver Overview, Thermal Transient Solver Overview, Calculate Thermal Losses, Thermal Loss Distribution, Field Monitor HFSS视频教程 ADS视频教程 CST视频教程 Ansoft Designer 中文教程 |
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