The Model of Drying Sessile Drop of Colloidal Solution

Vodolazskaya, Irina V.; Tarasevich, Yuri Yu.

doi:10.1142/s0217984911026280

Cited by 16 publications

(33 citation statements)

References 19 publications

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“…The volume fraction of the colloidal particles is constant inside the foot, that is, the outer gelled band, Φ g , and almost constant in the sol, Φ, except for a rather narrow area near the phase front. This stage was simulated in [164][165][166] and in [159,167]. (3) Final single-phase solid stage: the gelled deposit loses the remaining moisture very slowly.…”

Section: Evaporation Of a Complex Fluid Drop Containing Saltmentioning

confidence: 99%

“…The proposed theoretical models mainly deal with the first situation [23,90,105,167,202,[207][208][209][210][211][212][213][214]. Only a few models treat the deposit as impenetrable for flows and preventing evaporation [159,[165][166][167]. Nevertheless, the simulation of desiccated colloidal droplets with phase transition is extremely important for high-throughput drug screening [60], biostabilization [216], identification of fluids [183], and medical tests [139,[217][218][219].…”

Section: D Models Of Mass Transfermentioning

confidence: 99%

“…Nevertheless, the simulation of desiccated colloidal droplets with phase transition is extremely important for high-throughput drug screening [60], biostabilization [216], identification of fluids [183], and medical tests [139,[217][218][219]. The models in [159,[165][166][167] utilize sets of rather complicated partial differential equations (PDE).…”

Section: D Models Of Mass Transfermentioning

confidence: 99%

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Droplet Drying Patterns on Solid Substrates: From Hydrophilic to Superhydrophobic Contact to Levitating Drops

Tarafdar

Tarasevich

Choudhury

et al. 2018

Advances in Condensed Matter Physics

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This review is devoted to the simple process of drying a multicomponent droplet of a complex fluid which may contain salt or other inclusions. These processes provide a fascinating subject for study. The explanation of the rich variety of patterns formed is not only an academic challenge but also a problem of practical importance, as applications are growing in medical diagnosis and improvement of coating/printing technology. The fundamental scientific problem is the study of the mechanism of microand nanoparticle self-organization in open systems. The specific fundamental problems to be solved, related to this system, are the investigation of the mass transfer processes, the formation and evolution of phase fronts, and the identification of mechanisms of pattern formation. The drops of liquid containing dissolved substances and suspended particles are assumed to be drying on a horizontal solid insoluble smooth substrate. The chemical composition and macroscopic properties of the complex fluid, the concentration and nature of the salt, the surface energy of the substrate, and the interaction between the fluid and substrate which determines the wetting all affect the final morphology of the dried film. The range of our study encompasses the fully wetting case with zero contact angle between the fluid and substrate to the case where the drop is levitated in space, so there is no contact with a substrate and angle of contact can be considered as 180 ∘ .

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Section: Evaporation Of a Complex Fluid Drop Containing Saltmentioning

confidence: 99%

Section: D Models Of Mass Transfermentioning

confidence: 99%

Section: D Models Of Mass Transfermentioning

confidence: 99%

See 1 more Smart Citation

Droplet Drying Patterns on Solid Substrates: From Hydrophilic to Superhydrophobic Contact to Levitating Drops

Tarafdar

Tarasevich

Choudhury

et al. 2018

Advances in Condensed Matter Physics

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“…The converged solution of Eq. (10) is expressed at the surface of the l-th solid phase as e l · n = cos θ l , (11) which means that the free surface intersects with the surface of the l-th solid phase at the specified contact angle. The modification of the level set function in the solid phase is followed by the reinitialization of the level set function in the whole domain.…”

Section: Virtual Free Surface: Immersed Free Surface Modelmentioning

confidence: 99%

“…A simulation of drying colloidal suspension is a major challenge even though computational fluid dynamics is now well developed. Recently, many researchers have been performed macroscopic simulations of the drying colloidal suspension [9][10][11][12][13], in which the evolution of the solid phase fraction in the suspension has been solved. Although the macroscopic simulations are applicable to systems in actual size, the microstructures of the colloidal particles cannot be obtained.…”

Section: Introductionmentioning

confidence: 99%

Direct simulation of drying colloidal suspension on substrate using immersed free surface model

Fujita

Koike

Yamaguchi

2015

Journal of Computational Physics

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This paper presents a new direct simulation method for a drying colloidal suspension on a substrate. A key issue of the present method is the immersed free surface model proposed by the authors, which enables us to estimate accurately and efficiently capillary forces exerted on particles on a free surface. Using the immersed free surface model along with immersed boundary method and level set method, the present method leads to a three-way coupling of the fluid flow, the free surface motion and the particle motion. In addition, the present method includes a way of curvature estimation using virtual grid differencing to calculate accurately a surface tension. The way of curvature estimation is quantitatively validated through the simulation of a still droplet. The immersed free surface model is quantitatively validated through the simulation of a sphere moving across a free surface and the simulation of two spheres moving along a free surface. Finally, simulations of drying colloidal suspension containing 130 particles are performed to demonstrate the applicability of the present method to actual systems.

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Material assembly by droplet drying: From mechanics theories to applications

Chen

Peng

2023

Droplet

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Evaporation of droplets composed of insoluble materials provides a low‐cost and facile route for assembling materials and structures in a wide spectrum of functionalities down to the nanoscale and also serves as a basis for innovating ink‐solution‐based future manufacturing technologies. This review summarizes the fundamental mechanics theories of material assembly by droplet drying both on solid and liquid substrates and in a fully suspended air environment. The evolution of assembly patterns, material deformation, and liquid flow during droplet drying and its response to external stimuli ranging from solution surfactant and pH value, surface geometric pattern and wettability, drying temperature, pressure environment, to electrical field have been highlighted to elucidate the coupling mechanisms between solid materials and liquid solutions and the manipulation strategies for material assembly through an either active or passive means. The recent progresses in ink‐based printing technologies with selected examples are also presented to illustrate the immediate applications of droplet drying, with a focus on printing electronic sensors and biomedical devices. The remaining challenges and emerging opportunities are discussed.

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The Model of Drying Sessile Drop of Colloidal Solution

Cited by 16 publications

References 19 publications

Droplet Drying Patterns on Solid Substrates: From Hydrophilic to Superhydrophobic Contact to Levitating Drops

Droplet Drying Patterns on Solid Substrates: From Hydrophilic to Superhydrophobic Contact to Levitating Drops

Direct simulation of drying colloidal suspension on substrate using immersed free surface model

Material assembly by droplet drying: From mechanics theories to applications

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