±¹Á¦ÇмúÁö³í¹®
(2002) THE ACCURACY OF COMPUTATIONAL SIMULATION FOR NATURALLY VENTILATED MULTI-SPAN GREENHOUSE
Journal: An ASAE Meeting Presentation 024012
Author: I. Lee∗, S. Sase∗∗, L. Okushima∗∗, A. Ikeguchi∗∗∗, W. Park∗
Abstract
In this study, CFD model was developed to investigate the effect of roof vent opening on natural ventilation of fully open-roof multi-span greenhouses. Using the Particle Image Velocimetry (PIV) data (Lee et al., 2002), the CFD validity was preferentially investigated. The results showed that the internal airflow of the CFD were very similar with the PIV computed airflow patterns. Considering the averaged air velocity vertically under the middle gutter of 2-span greenhouse, the errors of the CFD computed results were 33.6, 18.2, and 13.5 %, respectively for the external wind speeds of 3.5, 4.4, and 6.3m/s at gutter height. It was assumed that the 2-dimensional input of the wind profile in the CFD model might cause the positive error compared to the PIV computed results. As the external wind speed increased, the strong incoming airflow stream moved from right to left at the second roof vent. As the number of the span increased over six, the error became mostly less than 10%.
Keywords: Accuracy, Computational fluid dynamics, Greenhouse, Natural ventilation
Download Link :
https://elibrary.asabe.org/abstract.asp?aid=10468
- ´ÙÀ½±Û
- (2002) OPTIMUM DESIGN OF FORCED VENTILATION SYSTEM OF PIGLET HOUSE USING COMPUTER SIMULATION
- / A3EL
- (2002) OPTIMUM DESIGN OF FORCED VENTILATION SYSTEM OF PIGLET HOUSE USING COMPUTER SIMULATION
Journal:An ASAE Meeting Presentation 024109
Author:I. Lee, W. Park, B. Yu, J. Yun, J. Chun, K. Kim, H. Cho
Abstract
The objective of this study was, by field experiment and visualization of interna..
- ÀÌÀü±Û
- (2001) Verification of Computational Fluid Dynamic Temperature Simulations in a Full-scale Naturally Ventilated Greenhouse
- / A3EL
- (2001) Verification of Computational Fluid Dynamic Temperature Simulations in a Full-scale Naturally Ventilated Greenhouse
Journal:Transactions of ASABE 44(1), pp.119-127.
Author:I.-B. Lee, T. H. Short
Abstract
Incompressible, isothermal airflows in a naturally ventilated multi.span greenh..
QUICK
MENU
TOP