Early stages of spreading and sintering
| Autor: | Milner, Scott T. |
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| Rok vydání: | 2019 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | The early stages of sintering of highly viscous droplets are very similar to the early stages of a viscous droplet spreading on a solid substrate. The flows in both problems are closely analogous to the displacements in a Hertzian elastic contact. We exploit that analogy to provide both a scaling argument and a calculation for the early growth of the contact radius $a$ with time, namely $a=(3 \pi \gamma R^2 t/(32 \eta))^{1/3}$. (This result is complementary to the well-known Tanner law for spreading, $a \sim t^{1/10}$, which holds in the regime of low contact angles.) For viscoelastic fluids, the linear scaling of $a^3$ with time is replaced by the general result that $a^3(t)$ is proportional to the creep compliance $J(t)$. Comment: 33 pages, 8 figures |
| Databáze: | arXiv |
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