Thermal conductivity of porous oxide layer: A numerical model based on CT data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F21%3APU141431" target="_blank" >RIV/00216305:26210/21:PU141431 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.scopus.com/record/display.uri?eid=2-s2.0-85112431445&origin=resultslist&sort=plf-f&src=s&sid=9dc4ded8d12304ec5ef27693dda21d7b&sot=b&sdt=b&sl=93&s=TITLE-ABS-KEY%28Thermal+conductivity+of+porous+oxide+layer%3a+A+numerical+model+based+on+CT+data" target="_blank" >https://www.scopus.com/record/display.uri?eid=2-s2.0-85112431445&origin=resultslist&sort=plf-f&src=s&sid=9dc4ded8d12304ec5ef27693dda21d7b&sot=b&sdt=b&sl=93&s=TITLE-ABS-KEY%28Thermal+conductivity+of+porous+oxide+layer%3a+A+numerical+model+based+on+CT+data</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mtcomm.2021.102705" target="_blank" >10.1016/j.mtcomm.2021.102705</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermal conductivity of porous oxide layer: A numerical model based on CT data

Popis výsledku v původním jazyce

This paper presents a novel method to determine the effective thermal conductivity of porous oxides formed on steel. This advanced approach enables more accurate numerical modeling of the oxide layer impact on the spray cooling of steel. Although the thermal conductivity of the oxide layer is highly influenced by the porous structure of iron oxides, the microstructure of the oxide layer was generally not considered in the studies of the thermal conductivity. In this paper a detailed 3D finite element model of the oxide layer based on a data acquired by computed tomography was created. The image acquisition and image processing are described. An unconventional method of converting image voxels directly into finite elements was used. Two distinct segmentation approaches were implemented and results of simulations were averaged. Obtained temperature-dependent results of the effective conductivity of the oxide layer was used as an input material parameter for the subsequent numerical simulation of the spray cooling of steel. The impact of the oxide layer with different thicknesses was quantified by plotting the temperature-dependent effective heat transfer coefficient. The limitations of the commonly used alternative analytical approach were identified.

Název v anglickém jazyce

Thermal conductivity of porous oxide layer: A numerical model based on CT data

Popis výsledku anglicky

This paper presents a novel method to determine the effective thermal conductivity of porous oxides formed on steel. This advanced approach enables more accurate numerical modeling of the oxide layer impact on the spray cooling of steel. Although the thermal conductivity of the oxide layer is highly influenced by the porous structure of iron oxides, the microstructure of the oxide layer was generally not considered in the studies of the thermal conductivity. In this paper a detailed 3D finite element model of the oxide layer based on a data acquired by computed tomography was created. The image acquisition and image processing are described. An unconventional method of converting image voxels directly into finite elements was used. Two distinct segmentation approaches were implemented and results of simulations were averaged. Obtained temperature-dependent results of the effective conductivity of the oxide layer was used as an input material parameter for the subsequent numerical simulation of the spray cooling of steel. The impact of the oxide layer with different thicknesses was quantified by plotting the temperature-dependent effective heat transfer coefficient. The limitations of the commonly used alternative analytical approach were identified.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/EF16_019%2F0000753" target="_blank" >EF16_019/0000753: Centrum výzkumu nízkouhlíkových energetických technologií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Materials Today Communications

ISSN

2352-4928

e-ISSN

—

Svazek periodika

28

Číslo periodika v rámci svazku

102705

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

102705-102705

Kód UT WoS článku

000696951000009

EID výsledku v databázi Scopus

2-s2.0-85112431445