Validation for a Granular Digital Twin: From 2D to 3D
Validation: Granular Digital Twin GeoApp
In this case, the full 3D geometry is known from a high-resolution µCT scan. However, only a single 2D slice (Fig. 1) was used to generate the digital twin. Based on this slice, a 3D microstructure model is automatically optimized to match the size distribution of the solid electrolyte, the size distribution of the active material, and the chord-length distribution.
The resulting deviations for these geometric descriptors, demonstrating the close agreement between scan and model, are summarized in Table 1. The reconstructed digital twin is shown both as a 2D slice in Fig. 2 and as the full 3D geometry in Fig. 3.
A strong visual agreement between the real scan and the digital twin is observed. For quantitative validation, the Ionic conductivity of the solid electrolyte, a purely 3D transport property, was computed for both structures.
The reference µCT geometry yields a value of 0.137 S/m, while the digital twin gives 0.132 S/m. The deviation of approximately 4% confirms the close structural agreement and demonstrates the capability to generate accurate 3D digital twins from 2D image data.
