Finite element simulation of heat transfer based on CT image

There are numerous definitions of particle shape descriptors, but it is necessary to select proper descriptors carefully. I compared several equations of 3D particle shape descriptors in paper:

Fei W, Narsilio GA, Disfani MM. Impact of three-dimensional sphericity and roundness on heat transfer in granular materials. Powder Technology 2019, 355:770-781, doi

Then I determined to use the following equation:

Fig.1 Equations of 3D particle shape descriptors

A framework was developed to calculate the above sphericity and roundness. Their correlation with effective thermal conductivity can also be quantified..

Fig.2 Framework to calculate 3D particle shape descriptors

The framework works well on sands with distinct particle shape.

Fig.3 Photos and CT images of five sands

Fig.4 Sphericity and roundness of individual grains in five sands

Please cite our relevant papers

• Fei W, Narsilio GA, Disfani MM. Impact of three-dimensional sphericity and roundness on heat transfer in granular materials. Powder Technology 2019, 355:770-781, doi.
• Fei W, Narsilio GA. Network analysis of heat transfer in sands. Computers and Geotechnics 2020, 127:103773, doi.

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