Simulation Domain Definition
It is critical to understand that SIMOULDING simulates the material distribution and thermal behavior within the internal volume of the mould. To ensure correct results, the imported CAD must follow these specifications:
Do NOT import the final part geometry with a pre-defined thickness (offset). The software is designed to calculate the thickness distribution based on the internal mould cavity.
Solid Context: The model must be a closed solid to allow successful mesh generation. If a closed shell is imported instead of a solid, it must be converted using the repair tools before proceeding.
Figure 1: Correct representation (Mould Internal Volume). Solid part (Part without thickness).
Geometry Preparation and Cleaning (Pre-State)
Mesh quality and solver convergence depend directly on the cleanliness of the geometry. Follow the "Garbage In, Garbage Out" principle: a "dirty" geometry will result in unreliable calculations.
Technical Cleaning Guidelines:
- Minimum Radii: Remove or simplify any fillet radii smaller than 3 mm.
- Minimum Edges: Avoid edges or segments with lengths shorter than 3 mm.
- Aesthetic Details: Eliminate embossed logos, engraved text, or cosmetic features that do not affect the general morphology of the part.
Detailed features do not add precision to the thermal calculation. On the contrary, they generate numerical "noise" and significantly increase calculation time without providing any technical benefit.
Figure 2: Example of CAD cleaning: removing minuscule radii and decorative engravings.
Software Protection Mechanisms
The system includes automated checks to protect the user from delivering misleading results due to poor geometry quality:
If the program detects corrupt mesh elements or sizes that prevent mathematical convergence, the calculation will abort. An error message will provide details about the specific conflicting elements.
If the geometry allows for calculation but contains distorted elements, a WARNING will be recorded in the log file. These specific zones may exhibit reduced precision.