Hydrogel droplet formation in coaxial minichannels governed by contact angle and spatiotemporal surface tension gradients; International Communications in Heat and Mass Transfer; Vol. 173

Hydrogel droplet formation in coaxial minichannels governed by contact angle and spatiotemporal surface tension gradients; International Communications in Heat and Mass Transfer; Vol. 173

Bibliographische Detailangaben
Parent link:International Communications in Heat and Mass Transfer.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 173.— 2026.— Article number 110808, 8 p.
1. Verfasser: Lukjyanov A. A. Andrey Aleksandrovich
Weitere Verfasser: Vozhakov I. S. Ivan Sergeevich, Piskunov M. V. Maksim Vladimirovich
Zusammenfassung:Title screen
The synthesis of ionically cross-linked alginate capsules in minichannels provides precise control over drug delivery systems; however, predicting droplet size remains challenging due to dynamic interfacial processes. This study conducted numerical simulations using the VOF method in OpenFOAM with experimental validation to investigate the influence of dynamic surface tension and wetting on the formation of droplets in coaxial minichannels. The trends in droplet diameter versus the flow rates of the continuous ( = 0.8–2.4 mL/min) and dispersed ( = 0.01–0.08 mL/min) phases were accurately reproduced, confirming the model's hydrodynamic validity. A numerical model is proposed to predict surface tension dynamics and its influence on droplet morphology. A non-monotonic dependence of the droplet diameter on the surface tension relaxation time was revealed. Dynamic surface tension models alter the diameter up to 30% compared to the static surface tension model. Two wetting regimes were identified, governed by the contact angle. At lower θ, the contact line pins to the outer channel surface, forming larger droplets. At higher θ, the contact line moves inward, producing smaller droplets
Текстовый файл
AM_Agreement
Sprache:Englisch
Veröffentlicht: 2026
Schlagworte:
OpenFOAM
Dynamic surface tension models
Alginate
Contact angle
электронный ресурс
труды учёных ТПУ
Online-Zugang:https://doi.org/10.1016/j.icheatmasstransfer.2026.110808
Format: Elektronisch Buchkapitel
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=685881

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