Image-Based Modelling using X-ray Computed Tomography and FEA
Finite Element Analysis | Characterisation of Materials | Homogenisation | Computational Fluid Dynamics
Image-based modelling is now transforming the way in which scientists and engineers study phenomena involving complex geometries, particularly in the areas of heat and mass transport through porous structures and over complex surfaces.
The premise is very simple - objects of interest (with complex architecture) are first scanned, often using MRI or (micro-)CT scanners. The image data (usually serial section radiographs) are then converted, or reconstructed, into 3-dimensional volumes. These volume objects can then be meshed so that they're suitable for analysis using finite element methods. Typical examples include the response of porous structures to applied mechanical loads, or the passage of fluids through porous structures or over surfaces with complex topography. What's more, although these typical workflow tasks have been handled separately by disparate software tools in the past, packages now exist in which all of these tasks can be handled natively within a single unified environment.
One such software package is available from Simpleware which can, through the addition of various modules, handle reconstruction tasks, analysis tasks, meshing tasks and simulation tasks. Simulation capabilities include multi-phase homogenisation of elastic mechanical properties, thermal properties and electrical properties. The permeability of porous structures can also be computed using a built-in Stokes flow solver.
Associates at Double Precision have extensive experience scanning complex geometries using X-ray tomography equipment. We also have experience using the image-based modelling tools available from Simpleware.