Capillary thinning of elastic and viscoelastic threads: From elastocapillarity to phase separation
| Autor: | Federica Burla, H.V.M. Kibbelaar, Gijsje H. Koenderink, Daniel Bonn, Krassimir P. Velikov, Antoine Deblais |
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| Přispěvatelé: | Soft Matter (WZI, IoP, FNWI), WZI (IoP, FNWI), IoP (FNWI), Soft Condensed Matter (ITFA, IoP, FNWI) |
| Rok vydání: | 2020 |
| Předmět: |
Fluid Flow and Transfer Processes
Extensional deformation Work (thermodynamics) Materials science Capillary action Fluid Dynamics (physics.flu-dyn) Computational Mechanics FOS: Physical sciences Mechanics Physics - Fluid Dynamics Condensed Matter - Soft Condensed Matter Similarity solution 01 natural sciences Instability Viscoelasticity 010305 fluids & plasmas Protein filament Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics Modeling and Simulation 0103 physical sciences Soft Condensed Matter (cond-mat.soft) Destabilisation 010306 general physics |
| Zdroj: | Physical Review Fluids Physical Review Fluids, 5(9) Physical Review Fluids, 5(9):092001. American Physical Society |
| ISSN: | 2469-990X |
| DOI: | 10.1103/physrevfluids.5.092001 |
| Popis: | The formation and destabilisation of viscoelastic filaments are of importance in many industrial and biological processes. Filament instabilities have been observed for viscoelastic fluids but recently also for soft elastic solids. In this work, we address the central question how to connect the dynamical behavior of viscoelastic liquids to that of soft elastic solids. We take advantage of a biopolymer material whose viscoelastic properties can be tuned over a very large range by its pH, and study the destabilization and ensuing instabilities in uniaxial extensional deformation. In agreement with very recent theory, we find that the interface shapes dictated by the instabilities converge to an identical similarity solution for low-viscosity viscoelastic fluids and highly elastic gels. We thereby bridge the gap between very fluid and strongly elastic materials. In addition, we provide direct evidence that at late times an additional filament instability occurs due to a dynamical phase separation. 11 pages, 13 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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