Apparent anisotropic thermal diffusivity measured in cubic single crystals by transient grating spectroscopy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F23%3A00572000" target="_blank" >RIV/61388998:_____/23:00572000 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/23:00367380

Výsledek na webu

<a href="https://pubs.aip.org/aip/jap/article/133/12/125108/2881424" target="_blank" >https://pubs.aip.org/aip/jap/article/133/12/125108/2881424</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0136850" target="_blank" >10.1063/5.0136850</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Apparent anisotropic thermal diffusivity measured in cubic single crystals by transient grating spectroscopy

Popis výsledku v původním jazyce

The effect of elastic anisotropy on thermal diffusivity determination by transient grating spectroscopy (TGS) was studied. In experiments performed on a set of cubic single crystals, it was observed that TGS measurements may indicate anisotropy of thermal diffusivity in otherwise thermally isotropic materials, and that the strength of this apparent anisotropy is correlated with the strength of the elastic anisotropy. To find a source of the observed phenomenon, finite-element simulations of the TGS measurements were carried out. Time-domain TGS signals were generated from the simulations and processed identically to the experimental data. The simulation results revealed that the elastic anisotropy affects the detected time-domain signals. Consequently, the thermal diffusivity coefficients determined from them showed the artificial directional dependence.

Název v anglickém jazyce

Apparent anisotropic thermal diffusivity measured in cubic single crystals by transient grating spectroscopy

Popis výsledku anglicky

The effect of elastic anisotropy on thermal diffusivity determination by transient grating spectroscopy (TGS) was studied. In experiments performed on a set of cubic single crystals, it was observed that TGS measurements may indicate anisotropy of thermal diffusivity in otherwise thermally isotropic materials, and that the strength of this apparent anisotropy is correlated with the strength of the elastic anisotropy. To find a source of the observed phenomenon, finite-element simulations of the TGS measurements were carried out. Time-domain TGS signals were generated from the simulations and processed identically to the experimental data. The simulation results revealed that the elastic anisotropy affects the detected time-domain signals. Consequently, the thermal diffusivity coefficients determined from them showed the artificial directional dependence.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10307 - Acoustics

Projekt

<a href="/cs/project/GA22-13462S" target="_blank" >GA22-13462S: Fyzikální akustika volných povrchů: od Greenových funkcí ke kvazibalistickým fononům</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of Applied Physics

ISSN

0021-8979

e-ISSN

1089-7550

Svazek periodika

133

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

125108

Kód UT WoS článku

000959810900005

EID výsledku v databázi Scopus

2-s2.0-85151512399