On the estimation of three-dimensional porosity of insect-proof screens
Identificadores
URI: http://hdl.handle.net/10835/14667
ISSN: 0168-1699
ISSN: 1872-7107
DOI: https://doi.org/10.1016/j.compag.2021.106639
ISSN: 0168-1699
ISSN: 1872-7107
DOI: https://doi.org/10.1016/j.compag.2021.106639
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Granados-Ortiz, Francisco Javier; Arrabal Campos, Francisco Manuel; López Martínez, Alejandro; Molina Aiz, Francisco Domingo; Peña Fernández, Araceli; [et al.]Fecha
2022-01-15Resumen
The two-dimensional estimation is the approach to porosity par excellence in the literature of insect-proof screens for their geometric characterisation and estimation of their aerodynamic parameters. However, this is not an accurate estimation, since the geometry of insect-proof screens consists of interlaced threads that create a three-dimensional woven structure, leading to different thicknesses and overlapping of threads. This paper suggests a mathematical approach to reconstruct computationally the 3D structure of the screens and to estimate the volumetric porosity, relying solely on easily measurable quantities such as diameter of threads, spacing of threads and thickness. The results on the application to 20 + 6 insect-proof screens in this work evidence that the suggested approach outperforms the standard two-dimensional modelling. These results also support experimental observations in the relationship between porosity and pressure drop not explainable by the two-dimensional a...