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dc.contributor.authorCouto, Nuno
dc.contributor.authorRouboa, Abel
dc.contributor.authorMonteiro, Eliseu
dc.contributor.authorViera, José
dc.date.accessioned2018-05-15T07:13:24Z
dc.date.available2018-05-15T07:13:24Z
dc.date.issued2012-08
dc.identifier.citationWorld Journal of Mechanics, 2012, 2, 181-187en_US
dc.identifier.uridoi:10.4236/wjm.2012.24022
dc.identifier.urihttp://hdl.handle.net/123456789/1372
dc.description.abstractWith the workmanship decrease in farms, the necessity to rationalize the use of other inputs and the development of technology has rapidly expanded the use of computer simulation in agricultural systems. One of the agricultural systems in which the modeling process of plant growth has been more engaged is the greenhouse production for horticultural crops. In Mediterranean climate, it is during the night that the energy losses are important and can be compensated with an artificial heat input. In this work an experiment was performed in a greenhouse in the north of Portugal. Temperature values in several points and air velocity in the aperture were measured during the night for three different cases: natural convective heating (case A); artificial heating tubes (AHT) (case B); AHT and natural ventilation (case C). A CFD simulation, carried out using FLOTRAN module of ANSYS, was also performed in two-dimensional configuration to obtain the indoor air temperature and velocity fields for the three cases. A very good agreement between experimental and numerical temperature values were verified, which allows to validate the adopted numerical procedure. In case A, the average temperature was 2.2˚C. An average increase of 6.7˚C and 3.5˚C on the air temperature was obtained for the case B and case C, respectively. These results clearly emphasis the influence of each thermal load on greenhouse indoor air propertiesen_US
dc.language.isoenen_US
dc.subjectGreenhousesen_US
dc.subjectArtificial Heating Tubesen_US
dc.subjectCFDen_US
dc.subjectFinite Element Methoden_US
dc.titleComputational Fluid Dynamics Analysis of Greenhouses with Artificial Heat Tubeen_US
dc.typeArticleen_US


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