Oscillations of a soft viscoelastic drop

Abstract A soft viscoelastic drop has dynamics governed by the balance between surface tension, viscosity, and elasticity, with the material rheology often being frequency dependent, which are utilized in bioprinting technologies for tissue engineering and drop-deposition processes for splash suppre...

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Autores principales:	Saiful I. Tamim, Joshua B. Bostwick
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Biotechnology TP248.13-248.65 Physiology QP1-981
Acceso en línea:	https://doaj.org/article/b638f5acd31e42cfb9fb9259e1fd056c
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id	oai:doaj.org-article:b638f5acd31e42cfb9fb9259e1fd056c
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spelling	oai:doaj.org-article:b638f5acd31e42cfb9fb9259e1fd056c2021-11-08T11:01:39ZOscillations of a soft viscoelastic drop10.1038/s41526-021-00169-12373-8065https://doaj.org/article/b638f5acd31e42cfb9fb9259e1fd056c2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41526-021-00169-1https://doaj.org/toc/2373-8065Abstract A soft viscoelastic drop has dynamics governed by the balance between surface tension, viscosity, and elasticity, with the material rheology often being frequency dependent, which are utilized in bioprinting technologies for tissue engineering and drop-deposition processes for splash suppression. We study the free and forced oscillations of a soft viscoelastic drop deriving (1) the dispersion relationship for free oscillations, and (2) the frequency response for forced oscillations, of a soft material with arbitrary rheology. We then restrict our analysis to the classical cases of a Kelvin–Voigt and Maxwell model, which are relevant to soft gels and polymer fluids, respectively. We compute the complex frequencies, which are characterized by an oscillation frequency and decay rate, as they depend upon the dimensionless elastocapillary and Deborah numbers and map the boundary between regions of underdamped and overdamped motions. We conclude by illustrating how our theoretical predictions for the frequency-response diagram could be used in conjunction with drop-oscillation experiments as a “drop vibration rheometer”, suggesting future experiments using either ultrasonic levitation or a microgravity environment.Saiful I. TamimJoshua B. BostwickNature PortfolioarticleBiotechnologyTP248.13-248.65PhysiologyQP1-981ENnpj Microgravity, Vol 7, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biotechnology TP248.13-248.65 Physiology QP1-981
spellingShingle	Biotechnology TP248.13-248.65 Physiology QP1-981 Saiful I. Tamim Joshua B. Bostwick Oscillations of a soft viscoelastic drop
description	Abstract A soft viscoelastic drop has dynamics governed by the balance between surface tension, viscosity, and elasticity, with the material rheology often being frequency dependent, which are utilized in bioprinting technologies for tissue engineering and drop-deposition processes for splash suppression. We study the free and forced oscillations of a soft viscoelastic drop deriving (1) the dispersion relationship for free oscillations, and (2) the frequency response for forced oscillations, of a soft material with arbitrary rheology. We then restrict our analysis to the classical cases of a Kelvin–Voigt and Maxwell model, which are relevant to soft gels and polymer fluids, respectively. We compute the complex frequencies, which are characterized by an oscillation frequency and decay rate, as they depend upon the dimensionless elastocapillary and Deborah numbers and map the boundary between regions of underdamped and overdamped motions. We conclude by illustrating how our theoretical predictions for the frequency-response diagram could be used in conjunction with drop-oscillation experiments as a “drop vibration rheometer”, suggesting future experiments using either ultrasonic levitation or a microgravity environment.
format	article
author	Saiful I. Tamim Joshua B. Bostwick
author_facet	Saiful I. Tamim Joshua B. Bostwick
author_sort	Saiful I. Tamim
title	Oscillations of a soft viscoelastic drop
title_short	Oscillations of a soft viscoelastic drop
title_full	Oscillations of a soft viscoelastic drop
title_fullStr	Oscillations of a soft viscoelastic drop
title_full_unstemmed	Oscillations of a soft viscoelastic drop
title_sort	oscillations of a soft viscoelastic drop
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b638f5acd31e42cfb9fb9259e1fd056c
work_keys_str_mv	AT saifulitamim oscillationsofasoftviscoelasticdrop AT joshuabbostwick oscillationsofasoftviscoelasticdrop
_version_	1718442462334156800

Oscillations of a soft viscoelastic drop

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