Transient simulation of coupled heat and moisture flow through a multi-layer porous solid exposed to solar heat flux
| Autor: | António Tadeu, Leopold Škerget, Carlos Alberto Brebbia |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science 010504 meteorology & atmospheric sciences Discretization Convective heat transfer Field (physics) 020209 energy Mechanical Engineering Flux Thermodynamics Boundary (topology) 02 engineering and technology Mechanics Condensed Matter Physics 01 natural sciences Integral equation 0202 electrical engineering electronic engineering information engineering Linear approximation Porosity 0105 earth and related environmental sciences |
| Zdroj: | International Journal of Heat and Mass Transfer. 117:273-279 |
| ISSN: | 0017-9310 |
| DOI: | 10.1016/j.ijheatmasstransfer.2017.10.010 |
| Popis: | The present paper reports the simulation of unsteady coupled moisture and heat transport through a multi-layer porous solid. The governing partial-differential transport equations are written and solved simultaneously for the continuous driving potentials, i.e. relative humidity and temperature. The coupled equations are solved numerically using a singular boundary integral representation of the governing equations. The multi-layer porous solid building elements under study are submitted to convective heat and mass exchange with the surrounding environment and exposed to solar heat flux. The integral equations are discretized using mixed-boundary elements and a multidomain method also known as the macro-elements technique (Brebbia, 1984 [1], Popov et al., 2007 [2]). The numerical model uses quadratic approximation over space and linear approximation over time for all field functions, which provides highly accurate numerical results. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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