Table 7
Average heat conductivity (W K-1 m-1) for random packing of balls (chondrules) with different porosities φ of some given material, normalised to the heat conductivity of the compact material (φ = 0).
| Model 1 | Model 2 | Model 3 | Model 4 | ||||
| φ | K | φ | K | φ | K | φ | K |
|
|
|||||||
| 0.38 | 0.315 | 0.35 | 0.253 | 0.35 | 0.290 | 0.359 | 0.204 |
| 0.30 | 0.415 | 0.30 | 0.380 | 0.30 | 0.418 | 0.273 | 0.399 |
| 0.25 | 0.522 | 0.25 | 0.496 | 0.25 | 0.526 | 0.197 | 0.567 |
| 0.20 | 0.625 | 0.20 | 0.604 | 0.20 | 0.625 | 0.134 | 0.709 |
| 0.15 | 0.722 | 0.15 | 0.705 | 0.15 | 0.721 | 0.087 | 0.808 |
| 0.10 | 0.819 | 0.10 | 0.804 | 0.10 | 0.817 | 0.053 | 0.884 |
| 0.05 | 0.912 | 0.05 | 0.905 | 0.05 | 0.912 | 0.030 | 0.937 |
| 0.00 | 1.000 | 0.00 | 1.000 | 0.00 | 1.000 | 0.008 | 0.985 |
Notes. Model 1: closest packing of equal-sized spheres. Model 2: packing of spheres with two different radii in ratio 2:1 and equal abundances. Model 3: packing of spheres with a distribution of sizes around some mean (see text). Model 4: body of sintered glass-beads.
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