Simulation of droplet detachment from hydrophobic and hydrophilic solid surfaces under the electric field using Lattice Boltzmann Method (LBM)

Mousavi, Seyed Esmaeil; Moshfegh, Abouzar; Afrouzi, Hamid Hassanzadeh; Javadzadegan, Ashkan; Toghraie, Davood

doi:10.1016/j.molliq.2020.113528

Cited by 14 publications

(4 citation statements)

References 35 publications

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“…25,26 In contemporary heat-transfer research, high-speed camera and infrared thermal imager are used for experimental measurement, while numerical simulations employ methods such as VOF, LEVEL SET, LBM, PFM, and MDPD. 27,28 The rate and intensity of heat transfer are usually characterized by parameters such as wall temperature, wall heat flux, and Nusselt number. 29,30 Teodori et al 31 investigated the heat-transfer phenomenon between millimeter-sized ethanol and pure water droplets and the heated wall, and the bubbles generated in the droplet impact area and the temperature changes at the spreading edge of the droplet were identified.…”

Section: T H Imentioning

confidence: 99%

“…In the heat and mass-transfer systems, solid–liquid heat transfer plays a crucial role in enhancing the system efficiency. The spreading or diffusion of droplets would cause the flow inside droplets and further affect the heat transfer between droplets and solid walls. , In contemporary heat-transfer research, high-speed camera and infrared thermal imager are used for experimental measurement, while numerical simulations employ methods such as VOF, LEVEL SET, LBM, PFM, and MDPD. , The rate and intensity of heat transfer are usually characterized by parameters such as wall temperature, wall heat flux, and Nusselt number. , Teodori et al investigated the heat-transfer phenomenon between millimeter-sized ethanol and pure water droplets and the heated wall, and the bubbles generated in the droplet impact area and the temperature changes at the spreading edge of the droplet were identified. The results show that the heat-transfer efficiency between the droplet and the wall is influenced by the droplet’s material, with ethanol droplets exhibiting higher heat-transfer efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Flow and Heat-Transfer Characteristics of Droplet Impingement on Hydrophilic Wires

Liu,

Zhang

et al. 2023

Langmuir

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It is a common phenomenon that droplets collide with wires in industrial production, and their flow and heat-transfer behavior significantly impact the production efficiency. This article presents an experimental and numerical study on the impact of pure water droplets on hydrophilic stainless-steel wires. The dynamic behavior and solid−liquid heat-transfer law of droplet impacting the wire are emphatically analyzed. The impact position of the droplets has a significant effect on their morphology. Under the condition of low Weber number (We), eccentric impacts tend to cause droplets to separate from the wire. Additionally, both We and wire/droplet size ratio have noticeable effects on the droplet morphology. The smaller the We, the larger the wire/droplet size ratio, and the easier it is for droplets to be captured by wires. Conversely, as We increases and the wire-to-droplet size ratio decreases, some droplets become detached from the wire, primarily exhibiting a single-film falling mode. Furthermore, the impact morphology of droplets is influenced by the Ohnesorge number (Oh). The higher the Oh, the more inclined the droplet to develop a double-film falling mode. There is obvious field synergy in the process of droplet impacting on wire. The maximum heat flux is located at the three-phase contact line, while the minimum heat flux is observed at the bubble interface. The impact position of droplets influences the temperature distribution, although its impact on the magnitude of temperature variation is minimal.

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Section: T H Imentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flow and Heat-Transfer Characteristics of Droplet Impingement on Hydrophilic Wires

Liu,

Zhang

et al. 2023

Langmuir

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“…They showed that a lenticular drop's equatorial profile can be a wedge due to normal current condition within the droplet. Mousavi et al [15] numerically studied the dynamics of droplet detachment from hydrophilic and hydrophobic surfaces under electric field through the Lattice Boltzmann method. Their findings highlighted the influence of several factors, including the Eotvos number (Eo), capillary number (Ca), Ohnesorge number (Oh) and the dielectric constant on the deformation of droplets (oblate/prolate) with varying degrees of wettabilities.…”

Section: Introductionmentioning

confidence: 99%

Triggering of electro-elastic anti-superhydrophobicity during non-Newtonian droplet collision

2023

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The present article discusses the electrohydro-dynamics of impacting non-Newtonian dielectric droplets on superhydrophobic (SH) surfaces. The role of important parameters like electric Eotvos number ( Eo e ), Weber number ( We ), dielectric particle concentration ( TiO 2 ) and polymer concentration ( PEG-400 ) were elucidated in this experimental study. Due to the interplay of non-Newtonian effects and electric field, we had observed the suppression of drop rebound on SH surfaces at much lower Eo e compared to its Newtonian counterpart. It has been observed that with an increase in both polymer concentration or dielectric particle concentration, the suppression of drop rebounds was observed at lower Eo e. In order to encapsulate the combined effects of electric field and non-Newtonian dynamics on drop rebound suppression, we have introduced the ‘electro-elastic effect’. Contrary to the common observations of drop rebound on SH surfaces, this electro-elastic effect induces inhibition of drop rebound, thereby resulting in anti-superhydrophobicity. Subsequently, we also established a scaling relationship to show that the rebound suppression is observed as a manifestation of the onset of electro-elastic instability, when a proposed electric Weissenberg number ( Wi e ) exceeds unity. Finally, we demarcated the rebound and rebound suppression regimes of droplet dynamics through a detailed phase map.

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“…Farzinpour et al 43 have discussed the simulation for molecular dynamics using effects of ferro-nanofluid and unsteady magnetic field effects. Mousavi et al 44 have utilized the Lattice Boltzman method to explore the simulation of droplet detachment under the impact of electric field. Turkyilmazoglu et al 45 – 48 have carried out a tremendous work for heat transfer using nanofluid with different flow geometries and various flow conditions.…”

Section: Introductionmentioning

confidence: 99%

Insight into the dynamics of second grade hybrid radiative nanofluid flow within the boundary layer subject to Lorentz force

Jawad

Saeed

Tassaddiq

et al. 2021

Sci Rep

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The magnetohydrodynamic hybrid second-grade nanofluid flow towards a stretching/shrinking sheet with thermal radiation is inspected in current work. Main concern of current investigation is to consider hybrid $$Al_{2} O_{3} - Cu$$ A l 2 O 3 - C u nanofluid which is perceived by hanging two dissimilar kinds of nanoparticles known as alumina and copper within the base fluid. The fluid motion is produced by non-linear stretching/shrinking sheet. The modeled equations which comprise of energy, motion and continuity equations are changed into dimensionless form using group of similar variables. To determine the solution of transformed problem, the Homotopy Analysis technique is used. The findings of this work revealed that the magnetic parameter improves the heat transfer rate. This work also ensures that there are non-unique solutions of modeled problem for shrinking case and a unique solution for stretching case. Higher values of $${\text{Re}}_{x}$$ Re x results in declining of flow field. Rise in $$M$$ M agrees to a decline in velocity distributions. Higher values of second order fluid parameter reduces the viscosity of fluid and accordingly velocity increases. Velocity profile is also a decreasing function of volume friction.

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Simulation of droplet detachment from hydrophobic and hydrophilic solid surfaces under the electric field using Lattice Boltzmann Method (LBM)

Cited by 14 publications

References 35 publications

Flow and Heat-Transfer Characteristics of Droplet Impingement on Hydrophilic Wires

Flow and Heat-Transfer Characteristics of Droplet Impingement on Hydrophilic Wires

Triggering of electro-elastic anti-superhydrophobicity during non-Newtonian droplet collision

Insight into the dynamics of second grade hybrid radiative nanofluid flow within the boundary layer subject to Lorentz force

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