There are various result-types in openCFS, which can be specified in the xml-file (node-, element-, region-, surfaceElement-, surfaceRegion-results):
<storeResults> <elemResult type=""> <allRegions/> </elemResult> <nodeResult type=""> <allRegions/> </nodeResult> <regionResult type=""> <allRegions/> </regionResult> <regionResult type=""> <allRegions/> </regionResult> <surfElemResult type=""> <allRegions/> </surfElemResult> <surfRegionResult type=""> <allRegions/> </surfRegionResult> </storeResults>
The type of your desired quantity depends on the type of the FE-result:
- A primary result corresponds to the degrees of freedom in the FE system. For example: The temperature T in the heat conduction PDE is a primary result. The output is either on nodes (for nodal elements) or on elements (for edge elements).
- A derived result is computed from the primary by applying a certain operator, e.g., gradient, curl, divergence. For example: The heat flux density is the gradient of the temperature -\nabla T in the heat conduction PDE. The output is on elements (for nodal as well as edge elements)
- An integrated result is computed by integrating a result over a volume. For example, integrating the heat flux density over a volume, results in the total heat flux. The output is stored in .hist files in the history-folder.