Morphological hysteresis of droplets wetting a series of triangular grooves

Dokowicz, Marcin; Nowicki, Waldemar

doi:10.1016/j.ijheatmasstransfer.2017.08.018

Cited by 3 publications

(1 citation statement)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If the adsorbing wall is heterogenous, such that its surface is modified chemically or geometrically, the wetting phenomena become considerably more intricate in comparison with a homogenous and perfectly flat wall considered above. The process of complete wetting may then be accompanied by a plenty of other interfacial phenomena such as filling [9][10][11][12][13][14][15][16][17][18][19][20][21][22], unbending [23][24][25], depinning [26][27][28], bridging [29][30][31] and other morphological transitions [32][33][34][35][36][37][38][39][40][41][42], whose interplay may give rise to very complex phase behaviour of the adsorbed fluid. In this work, let us consider a substrate (wall) which is flat but decorated by a macroscopically long stripe of width L which is of a material with a greater affinity to the liquid phase than the rest of the wall, such that its wetting temperature T stripe w is lower than the wetting temperature of the wall T wall w .…”

Section: Introductionmentioning

confidence: 99%

Height of a liquid drop on a wetting stripe

Malijevský

2020

Phys. Rev. E

View full text Add to dashboard Cite

Adsorption of liquid on a planar wall decorated by a hydrophilic stripe of width L is considered. Under the condition, that the wall is only partially wet (or dry) while the stripe tends to be wet completely, a liquid drop is formed above the stripe. The maximum height m(δµ) of the drop depends on the stripe width L and the chemical potential departure from saturation δµ where it adopts the value 0 = m(0). Assuming a long-range potential of van der Waals type exerted by the stripe, the interfacial Hamiltonian model is used to show that 0 is approached linearly with δµ with a slope which scales as L 2 over the region satisfying L ξ , where ξ is the parallel correlation function pertinent to the stripe. This suggests that near the saturation there exists a universal curve m(δµ) to which the adsorption isotherms corresponding to different values of L all collapse when appropriately rescaled. Although the series expansion based on the interfacial Hamiltonian model can be formed by considering higher order terms, a more appropriate approximation in the form of a rational function based on scaling arguments is proposed. The approximation is based on exact asymptotic results, namely that m ∼ δµ −1/3 for L → ∞ and that m obeys the correct δµ → 0 behaviour in line with the results of the interfacial Hamiltonian model. All the predictions are verified by the comparison with a microscopic density functional theory (DFT) and, in particular, the rational function approximation-even in its simplest form-is shown to be in a very reasonable agreement with DFT for a broad range of both δµ and L.

show abstract

Section: Introductionmentioning

confidence: 99%

Height of a liquid drop on a wetting stripe

Malijevský

2020

Phys. Rev. E

View full text Add to dashboard Cite

show abstract

Hysteresis in spreading and retraction of liquid droplets on parallel fiber rails

Wang

Schiller

2021

Soft Matter

View full text Add to dashboard Cite

show abstract

Semitheoretical Prediction of the Wetting Characteristics of Aqueous Ionic Liquid Solution on an Aluminum Finned-Tube Desiccant Contactor

Giannetti

Varela

Ariyadi

et al. 2018

Journal of Fluids Engineering

View full text Add to dashboard Cite

This study involves exploring a new design of an internally cooled/heated desiccant contactor by using a new ionic liquid (IL) solution as the sorptive solution. In order to optimize its operative performance, a semitheoretical model based on the principle of minimum energy is developed to predict the film rupture and wetting ability of the IL solution over a comprehensive range of IL mass fraction and flow rates. A first experimental validation of the fundamental equations of the theoretical model is presented and used as a reference to minimize deviations between predicted results and measured data by calibrating dedicated characteristic coefficients. The noteworthy quantitative and qualitative agreement in the whole range of IL mass fractions and flow rates is promising for contributing to the design of optimized system configurations and control strategies.

show abstract

Morphological hysteresis of droplets wetting a series of triangular grooves

Cited by 3 publications

References 39 publications

Height of a liquid drop on a wetting stripe

Height of a liquid drop on a wetting stripe

Hysteresis in spreading and retraction of liquid droplets on parallel fiber rails

Semitheoretical Prediction of the Wetting Characteristics of Aqueous Ionic Liquid Solution on an Aluminum Finned-Tube Desiccant Contactor

Contact Info

Product

Resources

About