Nanoparticle deposition during electrospraying - mathematical modelling

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Nanoparticle deposition during electrospraying - mathematical modelling

Popis výsledku v původním jazyce

Electrospray is one of the devices used in the fast developing sector of the nanostructured materials production. But unfortunately the deposition of the particles and also the morphology of the layer strongly depend on the operating conditions and are therefore difficult to predict. Our goal is to clarify how the morphology of the layer is influenced by various effects taking place during the final part of the droplet's motion. We use the Discrete Element Method (DEM) based on the second Newton's law and on the summation of the forces affecting the particles. The forces between the particles include non-contact van der Waals and contact elastic adhesive forces, while the drag force acts on a particle surrounded by a fluid. Moreover, the model was extended by the computation of the electric force. Although the morphologies predicted by the model were similar to the morphologies known from the experiments, we decided to continue in the improvement of our model and added the description of the discharging process. Due to the absence of the established description of the nanoparticles discharging, we had to come up with our own model. It computes the dynamics of the particle discharging mainly from the charge difference between the particle and the objects in the contact with it. The new results prove the importance of this extension. .64-2000 znaků. Anotace nesmí být totožná s názvem.

Název v anglickém jazyce

Nanoparticle deposition during electrospraying - mathematical modelling

Popis výsledku anglicky

Electrospray is one of the devices used in the fast developing sector of the nanostructured materials production. But unfortunately the deposition of the particles and also the morphology of the layer strongly depend on the operating conditions and are therefore difficult to predict. Our goal is to clarify how the morphology of the layer is influenced by various effects taking place during the final part of the droplet's motion. We use the Discrete Element Method (DEM) based on the second Newton's law and on the summation of the forces affecting the particles. The forces between the particles include non-contact van der Waals and contact elastic adhesive forces, while the drag force acts on a particle surrounded by a fluid. Moreover, the model was extended by the computation of the electric force. Although the morphologies predicted by the model were similar to the morphologies known from the experiments, we decided to continue in the improvement of our model and added the description of the discharging process. Due to the absence of the established description of the nanoparticles discharging, we had to come up with our own model. It computes the dynamics of the particle discharging mainly from the charge difference between the particle and the objects in the contact with it. The new results prove the importance of this extension. .64-2000 znaků. Anotace nesmí být totožná s názvem.

Druh

D - Stať ve sborníku

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings 43rd International Conference of the Slovak Society of Chemical Engineering

ISBN

978-80-89597-35-2

ISSN

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e-ISSN

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Počet stran výsledku

11

Strana od-do

0-11

Název nakladatele

Slovak Society of Chemical Engineering

Místo vydání

Bratislava

Místo konání akce

Tatranské Matliare

Datum konání akce

23. 5. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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