Short-time dynamics of partial wetting
SpletThe contact angle is known as a static contact angle when the contact line is stationary with respect to the solid substrate. Young's equation in Eq. () is therefore a description of the static contact angle.On the other hand, if the contact line is moving relative to the solid, the contact angle, whether it is advancing or receding, is known as a dynamic contact … Splet01. feb. 2001 · The partial wetting regime Essentially two different approaches exist to describe the sessile drop spreading: hydrodynamics and molecular kinetics. Since the shape of the drop is changing vs. time, the system drop-solid has to dissipate some energy.
Short-time dynamics of partial wetting
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SpletWhen a liquid drop contacts a wettable surface, the liquid spreads over the solid to minimize the total surface energy. The first moments of spreading tend to be rapid. For … Spletwe describe how the early wetting behavior is modified when the surface is partially wetting (θ eq > 0 ). This work on partial wetting adds a few additional details to our recent paper [9]. Finally, we share new observations and analytical considerations for the influence of the initial drop shape on the early time spreading dynamics.
Splet11. jun. 2008 · When a liquid drop contacts a wettable surface, the liquid spreads over the solid to minimize the total surface energy. The first moments of spreading tend to be … Splet16. feb. 2015 · For a completely wetting case (θ ~ 0°) the spreading radius was shown to follow r ~ (t/τ) 1/2, which can be derived by using the inertial time scale (ρR 3 γ) 1/2 in …
SpletWhen a liquid drop contacts a wettable surface, the liquid spreads over the solid to minimize the total surface energy. For perfectly wetting systems, the first moments of spreading are inertially dominated. In this work, we demonstrate that even in the presence of a contact line, the initial wetting is dominated by inertia rather than viscosity. We find … SpletWhen a liquid drop contacts a wettable surface, the liquid spreads over the solid to minimize the total surface energy. The first moments of spreading tend to be rapid. For example, a millimeter-sized water droplet will wet an area having the same diameter as the drop within a millisecond.
SpletHere we identify that even in the presence of a contact line, the initial wetting is dominated by inertia rather than viscosity. We find that the spreading radius follows a power-law …
Splet24. jan. 2024 · In Moon et al. 31 used X-ray phase-contrast imaging technique to study the needle dynamics and in- and near-nozzle flow characteristics associated with fuel dribble of a three-hole mini-sac type injector. They observed high shot-to-shot variations in dribble formation from the injector hole and inconsistent air ingestion which they attributed ... secy namesSpletThe spreading dynamics of small polydimethylsiloxane (PDMS) drops was studied on substrates with varying surface energies. For experimental parameters near the wetting transition, we observed small PDMS drops of different drop volumes as a function of time using interference video microscopy. While for large drops the con- push garden cartSplet20. sep. 2024 · The short time dynamics in capillary regimes are mostly governed by the competition between inertial or Rayleigh time scale ( τ i = ρ r 3 / γ) and viscous time scale ( τ v = ρ r 2 / μ ). In Fig. 2 (d), dimensionless drop base radius is plotted for each experimental case against dimensionless time (non-dimensionalized by the inertial time scale). secy movies on huluSpletAbstract. When a liquid drop contacts a wettable surface, the liquid spreads over the solid to minimize the total surface energy. The first moments of spreading tend to be rapid. … pushgard conductorSplet11. apr. 2024 · The annual statistics on forest fires worldwide reveal [1,2,3,4,5] that the number of woodland areas catching fire keeps rising every year.High rates of the fire front spread within a short time and multiply over the areas deforested by fire [].They are hazards to animals and populated areas and cause environmental pollution, which is among many … secy narutto charctersSpletFor perfectly wetting systems, this spreading is inertially dominated. Here we identify that even in the presence of a contact line, the initial wetting is dominated by inertia rather than viscosity. ... Dive into the research topics of 'Short-time dynamics of partial wetting'. Together they form a unique fingerprint. wetting Physics ... secy noteSpletShort-Time Dynamics of Partial Wetting James C. Bird, Shreyas Mandre, and Howard A. Stone* School of Engineering and Applied Sciences, Harvard University, Cambridge, … secyngc