Multi-scale modelling of heat transfer in polyurethane foams

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F17%3A43914168" target="_blank" >RIV/60461373:22340/17:43914168 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.ces.2017.06.035" target="_blank" >http://dx.doi.org/10.1016/j.ces.2017.06.035</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ces.2017.06.035" target="_blank" >10.1016/j.ces.2017.06.035</a>

Result language

angličtina

Original language name

Multi-scale modelling of heat transfer in polyurethane foams

Original language description

The influence of morphology and cell gas composition on heat insulation properties of polyurethane (PU) foams was investigated using a multi-scale mathematical model. The polymer absorption coefficient was determined from quantum chemical computations. Reverse non-equilibrium molecular dynamics was used to calculate the thermal conductivity of polymer and gas mixtures relevant to PU foams. The equivalent foam conductivity was calculated using homogeneous phase approach. The individual models were coupled together using suitable surrogate models within MoDeNa framework. To validate the proposed model 9 foam samples were prepared using different recipes, their morphology was characterized and their thermal conductivity was measured. The difference between experimental and predicted values was comparable to experimental error. Developed multi-scale model was used to identify the most suitable relation for the calculation of thermal conductivity of gas mixtures in PU foams and to quantify the influence of foam density, cell size, and strut content on heat insulation properties of PU foams.

Czech name

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Czech description

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Type

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

CEP classification

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OECD FORD branch

20401 - Chemical engineering (plants, products)

Project

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Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Name of the periodical

Chemical Engineering Science

ISSN

0009-2509

e-ISSN

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Volume of the periodical

172

Issue of the periodical within the volume

Neuveden

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

323-334

UT code for WoS article

000410833900027

EID of the result in the Scopus database

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