Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2008.4543.4551Rico-GarciaE. Lopez-CruzI.L. Herrera-RuizG. Soto-ZarazuaG.M. Castaneda-MirandaR. 122008824The aim of study was to investigate the effect of temperature
on air patterns in two different greenhouse configuration using two-dimensional
computational fluid dynamic models. The models were constructed on the
basis of two major assumptions: first, the inside temperature is considered
to have a vertical distribution while it is constant on horizontal planes;
second, temperature is the main driven force that causes air movement.
The computational results were validated with current literature data.
The models were later used to study the air patterns inside two greenhouse
configurations under zero and low wind velocities. The ventilation efficiency
was assessed on the basis of the ventilation rate and complemented with
the study of the internal air velocities at a height of 1.5 m. Results
indicate that applying temperatures as the main driven forces for the
buoyancy effect produced a positive correlation and agree with current
literature data, therefore, providing a simple way to study the ventilation
and inner air patterns. Results also, show that the ventilation in greenhouses
due to the temperature effect produces high air exchange rates. However,
the study of the inner air patterns reveals that those air patterns occur
near the openings causing almost no air exchange in the greenhouse central
area due to a stagnant effect that reduces the wind effect throughout
the greenhouse.]]>Anderson, J.D.,1995Ansys, F.,2007Boulard, T., J.F. Meneses, M. Mermier and G. Papadakis,1996Campen, J.B. and G.P.A. Bot,2003Dayan, J., E. Dayan, Y. Strassberg and E. Presnov,2004Fatnassi, H., T. Boulard and L. Bouirden,2003Fatnassi, H., T. Boulard and J. Lagier,2004Incropera, F.P. and D.P. DeWitt,1996Mistriotis, A., C. Arcidiacono, P. Picuno, G.P.A. Bot and G. Scarascida-Mugnozza,1997Molina-Aiz, F.D., D.L. Valera and A.J. Álvarez,2004Norton, T., D. Sun, J. Grant, R. Fallon and V. Dodd,2007Ould Khaoua, S.A., P.E. Bournet, C. Migeon, T. Boulard and G. Chassériaux,2006Rico-Garcia, E., J.L. Reyes-Araiza and G. Herrera-Ruiz,2006Roy, J.C., T. Boulard, C. Kittas and S. Wang,2002Sase, S.,2006