Capillary condensation and depinning transitions in open slits.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F21%3A00547277" target="_blank" >RIV/67985858:_____/21:00547277 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22340/21:43922323

Result on the web

<a href="http://hdl.handle.net/11104/0323552" target="_blank" >http://hdl.handle.net/11104/0323552</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevE.104.044801" target="_blank" >10.1103/PhysRevE.104.044801</a>

Result language

angličtina

Original language name

Capillary condensation and depinning transitions in open slits.

Original language description

We study the low-temperature phase equilibria of a fluid confined in an open capillary slit formed by twoparallel walls separated by a distance L which are in contact with a reservoir of gas. The top wall of the capillary is of finite length H while the bottom wall is considered of macroscopic extent. This system shows rich phase equilibria arising from the competition between two different types of capillary condensation, corner filling, and meniscus depinning transitions depending on the value of the aspect ratio a = L/H and divides into threenregimes: For long capillaries, with a < 2/π, the condensation is of type I involving menisci which are pinned at the top edges at the ends of the capillary. For intermediate capillaries, with 2/π < a < 1, depending on the value of the contact angle the condensation may be of type I or of type II, in which the menisci overspill into the reservoir and there is no pinning. For short capillaries, with a > 1, condensation is always of type II. In all regimes, capillary condensation is completely suppressed for sufficiently large contact angles which is determined explicitly. For long and intermediate capillaries, we show that there is an additional continuous phase transition in the condensed liquid-like phase, associated with the depinning of each meniscus as they round the upper open edges of the slit. Meniscus depinning is third-order for complete wetting and second-order for partial wetting. Detailed scaling theories are developed for these transitions and phase boundaries which connect with the theories of wedge (corner) filling and wetting encompassing interfacial fluctuation effects and the directninfluence of intermolecular forces.We test several of our predictions using a fully microscopic density functional theory which allows us to study the two types of capillary condensation and its suppression at the molecular level for different aspect ratios and contact angles.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project

<a href="/en/project/GA20-14547S" target="_blank" >GA20-14547S: Interfacial and critical phenomena of simple and complex fluids under nano-structured confinement</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

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

Name of the periodical

Physical Review E

ISSN

2470-0045

e-ISSN

2470-0053

Volume of the periodical

104

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

19

Pages from-to

044801

UT code for WoS article

000708537800007

EID of the result in the Scopus database

2-s2.0-85117710249