Role of melting and solidification in the spreading of an impacting water drop
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2024
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866916410466238464 |
|---|---|
| author | Sarlin, Wladimir Grivet, Rodolphe Xu, Julien Huerre, Axel Séon, Thomas Josserand, Christophe |
| author_facet | Sarlin, Wladimir Grivet, Rodolphe Xu, Julien Huerre, Axel Séon, Thomas Josserand, Christophe |
| contents | The present study reports experiments of water droplet impacting on ice or on a cold metallic substrate, with the aim of understanding the effect of phase change on the impingement process. Both liquid and substrate temperatures are varied, as well as the height of fall. The dimensionless maximum spreading diameter, $β_m$, is found to increase with both temperatures as well as with the impact velocity. Furthermore, $β_m$ is reduced when solidification, which enhances dissipation, is present, whereas fusion favours the liquid film spreading. These observations are rationalized by extending an existing model of effective viscosity, in which phase change alters the size and shape of the developing viscous boundary layer, thereby modifying the value of $β_m$. The use of this correction allows to adapt a scaling law existing for isothermal drop impacts to propose a universal law giving the maximum diameter of an impacting water droplet in the presence of melting or solidification. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_09143 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Role of melting and solidification in the spreading of an impacting water drop Sarlin, Wladimir Grivet, Rodolphe Xu, Julien Huerre, Axel Séon, Thomas Josserand, Christophe Fluid Dynamics The present study reports experiments of water droplet impacting on ice or on a cold metallic substrate, with the aim of understanding the effect of phase change on the impingement process. Both liquid and substrate temperatures are varied, as well as the height of fall. The dimensionless maximum spreading diameter, $β_m$, is found to increase with both temperatures as well as with the impact velocity. Furthermore, $β_m$ is reduced when solidification, which enhances dissipation, is present, whereas fusion favours the liquid film spreading. These observations are rationalized by extending an existing model of effective viscosity, in which phase change alters the size and shape of the developing viscous boundary layer, thereby modifying the value of $β_m$. The use of this correction allows to adapt a scaling law existing for isothermal drop impacts to propose a universal law giving the maximum diameter of an impacting water droplet in the presence of melting or solidification. |
| title | Role of melting and solidification in the spreading of an impacting water drop |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2405.09143 |