Analysis for Aerodynamic Resistance of Chrysanthemum Canopy through Wind Tunnel Test
2008
Yu, I.H. (Protected Horticulture Experiment Station, NHRI, RDA, Busan, Republic of Korea) | Yun, N.K. (National Institute of Agricultural Engineering, RDA, Suwon, Republic of Korea) | Cho, M.W. (Protected Horticulture Experiment Station, NHRI, RDA, Busan, Republic of Korea) | Lee, I.B. (Seoul National University, Seoul, Republic of Korea), E-mail: [email protected]
A wind tunnel test was conducted at Protected Horticulture Experiment Station of National Horticultural Research Institute in Busan to find the aerodynamic resistance and quadratic resistance coefficient of chrysanthemum in greenhouse. The internal plants of the CFD model has been designed as a porous media because of the complexity of its physical shapes. Then the aerodynamic resistance value should be input for analyzing CFD model that crop is considered while the value varies by crops. In this study, the aerodynamic resistance value of chrysanthemum canopy was preliminarily found through wind tunnel test. The static pressure at windward increased as wind velocity and planting density increased. The static pressure at leeward decreased as wind velocity increased but was not significantly affected by planting density. The difference of static pressure between windward and leeward increased as wind velocity and planting density increased. The aerodynamic resistance value of chrysanthemum canopy was found to be 0.22 which will be used later as the input data of Fluent CFD model. When the planting distances were 9×9 cm, 11×11 cm, and 13×13 cm, the quadratic resistance coefficients of porous media were found to be 2.22, 1.81, and 1.07, respectively. These values will be used later as the input data of CFX CFD model.
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