2015
DOI: 10.1016/j.ijthermalsci.2015.04.005
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High temperature two-phase thermal conductivity of ceramic sponges with stagnant fluid – Experimental results and correlation including thermal radiation

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Cited by 25 publications
(6 citation statements)
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“…To improve the performance of high-temperature systems based on open-cell cellular ceramics, understanding the detailed energy transport involved within such systems is important. The energy transport within most of these devices are due to the coupling between the two main individual modes of heat transfer, conduction and radiation [12]. Because of their microstructure (pore size, wall thickness...), these materials have a complex multiscale texture which actively attenuates thermal transfer via both conduction and radiation.…”
Section: Introductionmentioning
confidence: 99%
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“…To improve the performance of high-temperature systems based on open-cell cellular ceramics, understanding the detailed energy transport involved within such systems is important. The energy transport within most of these devices are due to the coupling between the two main individual modes of heat transfer, conduction and radiation [12]. Because of their microstructure (pore size, wall thickness...), these materials have a complex multiscale texture which actively attenuates thermal transfer via both conduction and radiation.…”
Section: Introductionmentioning
confidence: 99%
“…Moreover, for the sake of easiness, the conductive and the radiative contributions are determined separately [18], in a decoupled fashion. One of the simplest ways for performing the radiative calculation is by incorporating the Rosseland diffusion approximation, which assumes that the porous medium can be considered optically thick [12,13,21,22]. Although this approximation allows a qualitative description of the prominent role of radiation when temperature rises, in many cases, the values can be ill-predicted when compared with experimental data [13,18].…”
Section: Introductionmentioning
confidence: 99%
“…To reveal the heat insulation role of the prepared porous ceramics in the actual high-temperature environment applications, the heat balance method was further employed to establish a three-dimensional steady-state model by the Ansys method to predict the thermal insulation performance of foam products [11,20]. Table 2 listed the porosity and thermal conductivity data of fibre-board, air and as-prepared nepheline porous products [21,22], which were used in the heat balance simulation analysis. Without consideration of the pore size and distribution in porous foams, the relationship between the cold surface temperature of the present samples and the various heating source temperature was calculated and shown in Figure 9.…”
Section: Resultsmentioning
confidence: 99%
“…The importance of radiation for the simulation of the heat transport in fixed beds was already underpinned for particle filled fixed beds , and also for open-cell foams . Bianchi et al and Fischedick et al examined the influence of the radiative contribution for metallic and ceramic sponges, respectively. However, the influence of radiation is only prevalent at higher temperatures.…”
Section: Theoretical Backgroundmentioning
confidence: 99%