Modelling of Heat Transfer and Fluid Flow through a Granular Material and External Wall Barrier
| Autor: | Szymanek, E., A. Tyliszczak |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| ISSN: | 2199-9244 |
| DOI: | 10.24352/ub.ovgu-2019-009 |
| Popis: | Technische Mechanik; 39; 1; 85-95; ISSN 2199-9244 Heat and fluid flow simulations for granular material in wall barriers allow to design them in a way that maximallyreduces the expenditures on utilisation of buildings. This paper demonstrates the solution to the problem of thepassage of air through the external wall barrier. It shows how the temperature changes inside the wall barrierswhen the external temperature changes. Two types of partitions are tested: single-layer (granular material) andtwo-layer (granular and concrete material). The paper presents comparison of the results of the numerical modeland in-house code with the experimental data. The numerical model applied is based on the unsteady equationof heat conduction (3D) and the Navier-Stokes equations. A high-order compact method in combination with theWENO scheme and predictor-corrector method are applied for the spatio-temporal discretisation. The flows of airand heat in the granular layers are modelled using immersed boundary technique, which allows to use Cartesianmeshes for objects with very complex geometric shapes. The correctness of numerical model applied has beenverified by comparisons with ANSYS Fluent results and experimental data obtained from measurements performedin a laboratory and in-situ. |
| Databáze: | OpenAIRE |
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