Fractal modeling of polycrystalline PCMs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00342989" target="_blank" >RIV/68407700:21110/20:00342989 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/5.0025697" target="_blank" >http://dx.doi.org/10.1063/5.0025697</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0025697" target="_blank" >10.1063/5.0025697</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fractal modeling of polycrystalline PCMs

Popis výsledku v původním jazyce

We generate the grain size distribution for a material of a polycrystalline structure by a fractal modeling and use the results for theoretical predictions for peaks in the heat capacity vs. temperature plot. This is a continuation in our theoretical technique from which heat capacity peaks corresponding to first-order phase transitions can be obtained. In experiment the peaks are much broader and smaller in comparison with results of statistical mechanics for such transitions in macroscopic systems. However, we used the idea that, for a material composed of many grains, it is appropriate to apply the statistical mechanical results to the individual grains and then evaluate an average over all grains of various sizes. Then agreement between the theoretical and experimental results can be achieved. We illustrate the results of the fractal modeling for an example of pure alkane tricosane that undergoes a crystal to rotator phase transition at about 42.5 °C.

Název v anglickém jazyce

Fractal modeling of polycrystalline PCMs

Popis výsledku anglicky

We generate the grain size distribution for a material of a polycrystalline structure by a fractal modeling and use the results for theoretical predictions for peaks in the heat capacity vs. temperature plot. This is a continuation in our theoretical technique from which heat capacity peaks corresponding to first-order phase transitions can be obtained. In experiment the peaks are much broader and smaller in comparison with results of statistical mechanics for such transitions in macroscopic systems. However, we used the idea that, for a material composed of many grains, it is appropriate to apply the statistical mechanical results to the individual grains and then evaluate an average over all grains of various sizes. Then agreement between the theoretical and experimental results can be achieved. We illustrate the results of the fractal modeling for an example of pure alkane tricosane that undergoes a crystal to rotator phase transition at about 42.5 °C.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/GA18-03997S" target="_blank" >GA18-03997S: Vnitřní omítky se zvýšenou vlhkostní akumulační schopností</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

AIP Conference Proceedings 2275

ISBN

978-0-7354-4005-0

ISSN

—

e-ISSN

1551-7616

Počet stran výsledku

6

Strana od-do

"020021-1"-"020021-6"

Název nakladatele

AIP Publishing, APL, the American Institute of Physics

Místo vydání

Melville, NY

Místo konání akce

Eger

Datum konání akce

2. 9. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—