Numerical Simulation of Liquid Film Evaporation in Circular and Square Microcavities

Ahn, Hyojae; Son, Gihun

doi:10.1080/10407782.2014.949153

Cited by 10 publications

(3 citation statements)

References 22 publications

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“…D’Ambrosio et al formulated a mathematical model for the evolution of a thin droplet in a shallow axisymmetric well and validated the model by comparison with the present experimental results . Ahn et al used the level-set method to extend to three-dimensional computations of liquid film evaporation in circular and square microcavities and investigated the effects of dynamic contact angles and cavity geometry on the film evaporation …”

Section: Introductionmentioning

confidence: 67%

Lattice Boltzmann Study of Microdroplet Evaporation Process in Pixel Pits

Chen

et al. 2023

Langmuir

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Inkjet printing has the advantages of high material utilization, low cost, and large-area production and is a promising manufacturing technology for organic light-emitting diode (OLED) displays. However, the droplet evaporation in micron-size pixel pits is highly influenced by the pit wall. Such a process is extremely difficult to control, leading to the appearance of defects such as the coffee ring in the printing process of OLED displays. In this work, a multiphase thermal lattice Boltzmann (LB) model based on multiple distribution functions is established to study the evaporation process of micron-size droplets in pits. According to the characteristics of the largest number of the three-phase contact line (TCL) appearing in the evaporation process, the evaporation modes can be divided into three types, i.e., one, two, and three TCLs. In the 1-TCL mode, the droplet stays in constant contact radius (CCR) for the shortest time; in 2-TCL and 3-TCL modes, the liquid film fracture behavior of evaporating droplets in the pit is well captured. The effects of the pit height and the contact angle on the droplet evaporation mode are investigated in detail. The phase diagrams of evaporation modes with different parameters are also established. The revealed evaporation mechanism is supposed to be useful for regulating the droplet evaporation behavior and controlling the cured film shape in the OLED printing process.

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Section: Introductionmentioning

confidence: 67%

Lattice Boltzmann Study of Microdroplet Evaporation Process in Pixel Pits

Chen

et al. 2023

Langmuir

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“…(2009) calculated the radial velocity within an axisymmetric droplet in a cylindrical well for four different evaporative fluxes (slightly confusingly referred to as ‘four different modes of evaporation’). Son (2012) and Ahn & Son (2015) used a sharp-interface level-set method to simulate numerically the impact and evolution of an evaporating droplet in a cylindrical well, and the evolution of an evaporating droplet in both cuboidal and cylindrical wells, respectively. Wang & Fukai (2018) used a finite-element method to calculate numerically the evaporative flux from a droplet in a cylindrical well before touchdown.…”

Section: Introductionmentioning

confidence: 99%

Evaporation of a thin droplet in a shallow well: theory and experiment

D’Ambrosio¹,

Colosimo

Duffy³

et al. 2021

J. Fluid Mech.

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Motivated by the industrial manufacture of organic light-emitting-diode displays, we formulate and analyse a mathematical model for the evolution of a thin droplet in a shallow axisymmetric well of rather general shape both before and after touchdown that accounts for the spatially non-uniform evaporation of the fluid, perform physical experiments using three cylindrical wells with different small aspect ratios, and validate the mathematical model by comparing the present experimental results with the corresponding theoretical predictions for a cylindrical well.

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“…The inclusion of phase-change dynamics and flexible structures in the problem makes the list of available numerical methods even shorter [16][17][18][19][20]. These methods need to consider interfacial properties such as surface tension forces and fluid-structure interaction, while accurately account for material/momentum/energy exchange on geometrically complicated interfaces and material domains.…”

Section: Introductionmentioning

confidence: 99%

Interaction of an Oscillating Flexible Plate and Nucleate Pool Boiling Vapor Bubble: Fluid-Structure Interaction in a Multimaterial Multiphase System

Vahab

Shoele

Sussman

2018

2018 Fluid Dynamics Conference

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Many of the real world problems in engineering and science involve interactions of multiple materials and phases. The numerical modeling of such system should be able to handle the material and phase multitude to capture physics of problems. Here we present our initial results for introducing fluid-structure interaction for flexible geometries in our multimaterial multiphase fluid solver, which also captures phase change phenomena such as solidification and boiling. The multimaterial approach applies a hybrid moment of fluid and level set algorithm to handle material domains. The fluid-structure interaction method is a force-feedback algorithm developed for a flexible fiber geometry. Numerical simulations are performed to evaluate this approach, and as an application, study the effects of an oscillating flexible/rigid plate on a single-bubble nucleate pool boiling process.

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Numerical Simulation of Liquid Film Evaporation in Circular and Square Microcavities

Cited by 10 publications

References 22 publications

Lattice Boltzmann Study of Microdroplet Evaporation Process in Pixel Pits

Lattice Boltzmann Study of Microdroplet Evaporation Process in Pixel Pits

Evaporation of a thin droplet in a shallow well: theory and experiment

Interaction of an Oscillating Flexible Plate and Nucleate Pool Boiling Vapor Bubble: Fluid-Structure Interaction in a Multimaterial Multiphase System

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