Spreading of a viscoelastic drop on a solid substrate
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2023
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866929597286711296 |
|---|---|
| author | Rostami, Peyman Fricke, Mathis Schubotz, Simon Patel, Himanshu Azizmalayeri, Reza Auernhammer, Güunter K. |
| author_facet | Rostami, Peyman Fricke, Mathis Schubotz, Simon Patel, Himanshu Azizmalayeri, Reza Auernhammer, Güunter K. |
| contents | We study the spreading of viscous and viscoelastic drops on solid substrates with different wettability. In the early stages of spreading, we find that the viscoelastic drop spreads with faster and a different power law than the Newtonian drop (i.e. aqueous glycerine solution) for the same zero shear rate viscosity. We argue that the effect of viscoelasticity is only observable for experimental time scales in the order of the internal relaxation time of the polymer solution or longer times. Near the contact line, the effective viscosity is lower for the viscoelastic drop than for the Newtonian drop. Together with its shear rate dependency, this difference in effective viscosity can explain the different spreading dynamics. We support our experimental findings with a simple perturbation model that qualitatively agrees with our findings. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_14515 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Spreading of a viscoelastic drop on a solid substrate Rostami, Peyman Fricke, Mathis Schubotz, Simon Patel, Himanshu Azizmalayeri, Reza Auernhammer, Güunter K. Soft Condensed Matter Fluid Dynamics We study the spreading of viscous and viscoelastic drops on solid substrates with different wettability. In the early stages of spreading, we find that the viscoelastic drop spreads with faster and a different power law than the Newtonian drop (i.e. aqueous glycerine solution) for the same zero shear rate viscosity. We argue that the effect of viscoelasticity is only observable for experimental time scales in the order of the internal relaxation time of the polymer solution or longer times. Near the contact line, the effective viscosity is lower for the viscoelastic drop than for the Newtonian drop. Together with its shear rate dependency, this difference in effective viscosity can explain the different spreading dynamics. We support our experimental findings with a simple perturbation model that qualitatively agrees with our findings. |
| title | Spreading of a viscoelastic drop on a solid substrate |
| topic | Soft Condensed Matter Fluid Dynamics |
| url | https://arxiv.org/abs/2308.14515 |