Abstract
This study was conducted to determine the drag coefficient and the relationship between permeability (K) and momentum loss coefficients (C f) of a tomato canopy for various leaf area densities. The experiments were conducted in a large-scale wind tunnel system with a tomato canopy. The static pressures and air velocity measurements were performed at several heights in the y-direction and various positions in the z-direction in the wind tunnel test section. The relationship between pressure drop and air velocity across the tomato canopy was determined using a porous medium approach. A drag coefficient of 0.31 was obtained for the tomato canopy used in the experiment. The permeability of the tomato canopy ranged from 0.006 to 0.65 for a leaf area density (L) of 4 (m2 m-3), from 0.004 to 0.41 for L = 5, and from 0.003 to 0.3 for L = 6 as Cf changed from 0.1 to 1. Thus, a mature tomato canopy having L = 6 could be used with a canopy permeability of K = 0.017 and a momentum loss coefficient of Cf = 0.245.
Original language | English (US) |
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Pages (from-to) | 1921-1927 |
Number of pages | 7 |
Journal | Transactions of the ASABE |
Volume | 55 |
Issue number | 5 |
State | Published - Sep 2012 |
Keywords
- Computational fluid dynamics
- Drag coefficient
- Momentum loss coefficient
- Permeability
- Porosity
- Tomato
- Wind tunnel
ASJC Scopus subject areas
- Forestry
- Food Science
- Biomedical Engineering
- Agronomy and Crop Science
- Soil Science