Dynamics of Drop Coalescence on a Surface: The Role of Initial Conditions and Surface Properties
| hal.structure.identifier | Service des Basses Températures [SBT ] | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | NARHE, R | |
| hal.structure.identifier | Physique et mécanique des milieux hétérogenes (UMR 7636) [PMMH] | |
| hal.structure.identifier | Service des Basses Températures [SBT ] | |
| dc.contributor.author | BEYSENS, D | |
| hal.structure.identifier | Service de physique de l'état condensé [SPEC - UMR3680] | |
| hal.structure.identifier | Service des Basses Températures [SBT ] | |
| dc.contributor.author | NIKOLAYEV, Vadim | |
| dc.date.issued | 2005 | |
| dc.identifier.issn | 0195-928X | |
| dc.description.abstractEn | An investigation of the coalescence of two water drops on a surface is presented and compared with drop spreading. The associated capillary numbers are very low (< 10-5). The drops relax exponentially towards equilibrium. The typical relaxation time tc decreases with contact angle. tc is proportional to the drop size R, thus defining a characteristic velocity U* =R/tc. The corresponding U* values are smaller by many orders of magnitude than the bulk hydrodynamic velocity (U = /, with the gas-liquid surface tension and the viscosity). The dynamics of receding (coalescence) and spreading motion is found of the same order when coalescence or spreading is induced by a syringe. The dynamics of coalescence induced with the syringe deposition is systematically faster by an order of magnitude than condensation-induced coalescence. This disparity is explained by the coupling of the contact line motion with the oscillation of the drop observed for syringe deposition but absent for condensation-induced coalescence. | |
| dc.language.iso | en | |
| dc.publisher | Springer Verlag | |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/ | |
| dc.subject.en | capillary | |
| dc.subject.en | coalescence | |
| dc.subject.en | contact angle | |
| dc.subject.en | contact line velocity | |
| dc.subject.en | wetting | |
| dc.title.en | Dynamics of Drop Coalescence on a Surface: The Role of Initial Conditions and Surface Properties | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1007/s10765-005-8593-4 | |
| dc.subject.hal | Physique [physics]/Physique [physics]/Dynamique des Fluides [physics.flu-dyn] | |
| dc.subject.hal | Physique [physics]/Mécanique [physics]/Mécanique des fluides [physics.class-ph] | |
| bordeaux.journal | International Journal of Thermophysics | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01261693 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01261693v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=International%20Journal%20of%20Thermophysics&rft.date=2005&rft.eissn=0195-928X&rft.issn=0195-928X&rft.au=NARHE,%20R&BEYSENS,%20D&NIKOLAYEV,%20Vadim&rft.genre=article |
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