Equivalence of sessile droplet dynamics under periodic and steady electric fields

Abstract The electrohydrodynamics of a sessile droplet under the influence of periodic and steady electric fields in microgravity conditions is theoretically investigated using an inertial lubrication model. Previous studies have revealed that a freely suspended spherical droplet with unequal conduc...

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Autores principales:	Muhamed Ashfak Kainikkara, Dipin S. Pillai, Kirti Chandra Sahu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Biotechnology TP248.13-248.65 Physiology QP1-981
Acceso en línea:	https://doaj.org/article/2f44b36dc908488f8cd71ca36bf63f4f
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spelling	oai:doaj.org-article:2f44b36dc908488f8cd71ca36bf63f4f2021-11-21T12:29:50ZEquivalence of sessile droplet dynamics under periodic and steady electric fields10.1038/s41526-021-00176-22373-8065https://doaj.org/article/2f44b36dc908488f8cd71ca36bf63f4f2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41526-021-00176-2https://doaj.org/toc/2373-8065Abstract The electrohydrodynamics of a sessile droplet under the influence of periodic and steady electric fields in microgravity conditions is theoretically investigated using an inertial lubrication model. Previous studies have revealed that a freely suspended spherical droplet with unequal conductivity and permittivity ratios exhibits distinct dynamics under periodic and equivalent steady forcing in the root mean-square sense. However, it is unclear when (if at all) such distinct dynamics occur for periodic and equivalent steady forcing in the case of sessile droplets. The equivalence between periodic and steady forcing is shown to be governed by the interfacial charge buildup, which further depends on the competition between the charge relaxation and forcing timescales. A circulation-deformation map is introduced for the sessile droplet that acts as a guideline to achieve electric field-induced wetting or dewetting as the case may be. We also demonstrate that a droplet may be rendered either more or less wetting solely by tuning the forcing frequency.Muhamed Ashfak KainikkaraDipin S. PillaiKirti Chandra SahuNature 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 Muhamed Ashfak Kainikkara Dipin S. Pillai Kirti Chandra Sahu Equivalence of sessile droplet dynamics under periodic and steady electric fields
description	Abstract The electrohydrodynamics of a sessile droplet under the influence of periodic and steady electric fields in microgravity conditions is theoretically investigated using an inertial lubrication model. Previous studies have revealed that a freely suspended spherical droplet with unequal conductivity and permittivity ratios exhibits distinct dynamics under periodic and equivalent steady forcing in the root mean-square sense. However, it is unclear when (if at all) such distinct dynamics occur for periodic and equivalent steady forcing in the case of sessile droplets. The equivalence between periodic and steady forcing is shown to be governed by the interfacial charge buildup, which further depends on the competition between the charge relaxation and forcing timescales. A circulation-deformation map is introduced for the sessile droplet that acts as a guideline to achieve electric field-induced wetting or dewetting as the case may be. We also demonstrate that a droplet may be rendered either more or less wetting solely by tuning the forcing frequency.
format	article
author	Muhamed Ashfak Kainikkara Dipin S. Pillai Kirti Chandra Sahu
author_facet	Muhamed Ashfak Kainikkara Dipin S. Pillai Kirti Chandra Sahu
author_sort	Muhamed Ashfak Kainikkara
title	Equivalence of sessile droplet dynamics under periodic and steady electric fields
title_short	Equivalence of sessile droplet dynamics under periodic and steady electric fields
title_full	Equivalence of sessile droplet dynamics under periodic and steady electric fields
title_fullStr	Equivalence of sessile droplet dynamics under periodic and steady electric fields
title_full_unstemmed	Equivalence of sessile droplet dynamics under periodic and steady electric fields
title_sort	equivalence of sessile droplet dynamics under periodic and steady electric fields
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2f44b36dc908488f8cd71ca36bf63f4f
work_keys_str_mv	AT muhamedashfakkainikkara equivalenceofsessiledropletdynamicsunderperiodicandsteadyelectricfields AT dipinspillai equivalenceofsessiledropletdynamicsunderperiodicandsteadyelectricfields AT kirtichandrasahu equivalenceofsessiledropletdynamicsunderperiodicandsteadyelectricfields
_version_	1718418934411034624

Equivalence of sessile droplet dynamics under periodic and steady electric fields

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