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Airflow and microclimate patterns in a one-hectare Canary type greenhouse: an experimental and CFD assisted study Inra
Majdoubi, H.; Boulard, T.; Fatnassi, H.; Bouirden, L..
This study presents an analysis of air circulation and microclimate distribution during daytime in a 1-hectare Canary type tomato greenhouse in the coastal area of southern Morocco. The investigation of the climate inside the greenhouse is based on a numerical simulation using a finite volumes method to solve the mass, momentum and energy conservation equations. The main novelty of this simulation lies in the realism of the 3D modelling of this very large agricultural structure with (i) a coupling of convective and radiative exchanges at the surface of the plastic roof cover, (ii) simulation of the dynamic influence of the insect screens and tomato crop on airflow movement, using the concept of porous medium, (iii) simulation, in each grid cell of the crop...
Tipo: Journal Article Palavras-chave: MODELE TRIDIMENSIONNEL; FILET ANTI-INSECTES GREENHOUSE; CFD; MODELLING; AIRFLOW; CLIMATE DISTRIBUTION; INSECT SCREENS.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010e4485b5e&uri=/notices/prodinra1/2010/03/
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Botrytis cinerea spore balance of a greenhouse rose crop Inra
Boulard, T.; Chave, M.; Fatnassi, H.; Poncet, C.; Roy, J.C..
Fungal pathogens are among the most virulent bioagressors of protected crops. For sustainable plant production and to protect the crop against these airborne organisms one must determine their origin, i.e. whether they come from outside the greenhouse or are produced inside it.We considered Botrytis cinerea spore concentration as a particular physical species which is transported by air in the same way as heat, CO2, water vapour or any tracer gas. We constructed a mass balance of the viable Botrytis spores on the whole-greenhouse volume to assess the inside production of spores and their exchanges.The different elements in the spore balance are considered and are determined experimentally:• spore transfer into or out of the greenhouse is deduced from the...
Tipo: Journal Article Palavras-chave: GREENHOUSE; AIR EXCHANGE RATE; SPORE; BALANCE; VENTILATION; ROSE CROP.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008dc736418&uri=/notices/prodinra1/2011/04/
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