SLCT / Terrain slice file format with GEOM terrain

[johodges]

My understanding is the SLCT format uses the 2-d structured grid file format for output with the node locations aligned with the gas phase grid near the surface. Is the plan to continue using this data format for GEOM terrain or do we want to switch to the GCF format aligning to the bingeom? I have a slight preference for swapping to the GCF format since it will align it with other GEOM outputs and similar to other file formats like VTK.

[marcosvanella]

Is SLCT what is used for AGL slices?

[johodges]

That's correct. I was visualizing AGL slices in an external software package and this question came to mind.

[mcgratta]

There have been several different approaches to visualizing GEOM data and terrain data. Before any new formats are proposed, let's make sure we've considered existing ones and if they are not sufficient, maybe we can replace the old with the new.

[marcosvanella]

Most if not all af the AGL data is related to gasphase data, which is sampled either from cut-cells or the structured mesh, depending how far from the geometry the AGL slice is. Using the geometry triangulation with an offset as the mesh where this data lives for AGL is something we have thought about in the past (Glenn had an idea on generalizing this). The right refinement of the mesh for gasphase info is not the terrain triangulation but the fds mesh size though. We could use the CFACE mesh to create a triangulation extruded to the AGL position, but this will not be optimal for all ratios of surface triangle size/FDS mesh size. We might end up with a large amount of small triangles that take the same value of gas temp for example. The other option is to convert the structured AGL slice we already have to an unstructured one where each quadrilateral is now defined by two triangles, as done in structured faces for unstructured slices.