Surface viscosity in simple liquids
Malgaretti P, Bafile U, Vallauri R, Jedlovszky P, Sega M (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 158
Article Number: 114705
Journal Issue: 11
DOI: 10.1063/5.0141971
Abstract
The response of Newtonian liquids to small perturbations is usually considered to be fully described by homogeneous transport coefficients like shear and dilatational viscosity. However, the presence of strong density gradients at the liquid/vapor boundary of fluids hints at the possible existence of an inhomogeneous viscosity. Here, we show that a surface viscosity emerges from the collective dynamics of interfacial layers in molecular simulations of simple liquids. We estimate the surface viscosity to be 8-16 times smaller than that of the bulk fluid at the thermodynamic point considered. This result can have important implications for reactions at liquid surfaces in atmospheric chemistry and catalysis.
Involved external institutions
Forschungszentrum Jülich / Research Centre Jülich (FZJ)
Germany (DE)
Nello Carrara Institute of Applied Physics / Istituto di Fisica Applicata Nello Carrara (IFAC)
Italy (IT)
Eszterházy Károly Catholic University
Hungary (HU)
University College London (UCL)
United Kingdom (GB)
Germany (DE)
Nello Carrara Institute of Applied Physics / Istituto di Fisica Applicata Nello Carrara (IFAC)
Italy (IT)
Eszterházy Károly Catholic University
Hungary (HU)
University College London (UCL)
United Kingdom (GB)
How to cite
APA:
Malgaretti, P., Bafile, U., Vallauri, R., Jedlovszky, P., & Sega, M. (2023). Surface viscosity in simple liquids. Journal of Chemical Physics, 158(11). https://dx.doi.org/10.1063/5.0141971
MLA:
Malgaretti, Paolo, et al. "Surface viscosity in simple liquids." Journal of Chemical Physics 158.11 (2023).
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