Structure of liquids from reference hard body fluids: Additive vs non-additive hard body models

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F25%3A00619625" target="_blank" >RIV/67985858:_____/25:00619625 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0366295" target="_blank" >https://hdl.handle.net/11104/0366295</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0253528" target="_blank" >10.1063/5.0253528</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structure of liquids from reference hard body fluids: Additive vs non-additive hard body models

Popis výsledku v původním jazyce

Following the early simulation results for simple liquids, various hard body fluids have been used in molecular-based equations of state as a leading/reference term. This has been justified for normal liquids by the similarity of their structure, but for polar and associating ones, a direct application of hard body models has not been considered so far. Viewing the hard body models, fused-hard-sphere bodies, as simple geometrical objects, their mutual interaction is additive. However, when accounting for the mutual effect of the site-site interactions, the individual hard sphere-hard sphere interactions may become non-additive, and consequently, the resulting interaction between the hard bodies becomes non-additive, which may also affect their structure. The effect of the non-additivity on the structural properties, the site-site and dipole-dipole correlation functions are analyzed in detail by considering three polar fluids, quadrupolar carbon dioxide, dipolar acetonitrile, and acetone, as well as two associating fluids, methanol and water. The modification of the mutual geometry in the non-additive models leads to differences both in their structural and orientation correlations. The comparison of the structure of the non-additive purely repulsive hard-body models with those of the empirical models of the chosen real liquids shows surprising similarities, which extends the possibilities of the direct application of the hard-body fluids as reference systems in perturbation theories.

Název v anglickém jazyce

Structure of liquids from reference hard body fluids: Additive vs non-additive hard body models

Popis výsledku anglicky

Following the early simulation results for simple liquids, various hard body fluids have been used in molecular-based equations of state as a leading/reference term. This has been justified for normal liquids by the similarity of their structure, but for polar and associating ones, a direct application of hard body models has not been considered so far. Viewing the hard body models, fused-hard-sphere bodies, as simple geometrical objects, their mutual interaction is additive. However, when accounting for the mutual effect of the site-site interactions, the individual hard sphere-hard sphere interactions may become non-additive, and consequently, the resulting interaction between the hard bodies becomes non-additive, which may also affect their structure. The effect of the non-additivity on the structural properties, the site-site and dipole-dipole correlation functions are analyzed in detail by considering three polar fluids, quadrupolar carbon dioxide, dipolar acetonitrile, and acetone, as well as two associating fluids, methanol and water. The modification of the mutual geometry in the non-additive models leads to differences both in their structural and orientation correlations. The comparison of the structure of the non-additive purely repulsive hard-body models with those of the empirical models of the chosen real liquids shows surprising similarities, which extends the possibilities of the direct application of the hard-body fluids as reference systems in perturbation theories.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Chemical Physics

ISSN

0021-9606

e-ISSN

1089-7690

Svazek periodika

162

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

164505

Kód UT WoS článku

001476941700022

EID výsledku v databázi Scopus

2-s2.0-105003322915