English
norskBlar i forfatter "Xu, Yizhong"
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Feasibility of Computational Fluid Dynamics for Analyzing Airflow around Porous Fences
(Journal article; Peer reviewed, 2019-01-19)This article presents using the computational fluid dynamics (CFD) modeling to analyze the flow around porous fences. The feasibility of applying 2D and 3D models was assessed with respect to corresponding wind tunnel experiments. Comparisons between the flow structures on leeward of the fence as predicted by CFD models and the wind tunnel measurements were discussed. Velocity values for the two ... -
Investigation of the Structure of Airflow Behind a Porous Fence Aided by CFD Based Virtual Sensor Data
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-02-28)Physical experiments have difficulties to thoroughly investigate the full structure of air flow behind a porous fence. Physical measurement sensors have their limitations of data acquisitions in turbulent air flow. Computational Fluid Dynamics (CFD) technique provides an infinite number of virtual sensors that allows producing quantitative CFD based virtual sensors data for users. In this paper, ... -
Measurement of Wind Flow Behavior at the Leeward Side of Porous Fences Using Ultrasonic Anemometer Device
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-01)Efficiency of wind fences is evaluated by the reduction of wind velocity and the effective shelter area behind the fence. Fence porosity is the most influential structural parameters in the porous fence design, and has significant impact on the structure of wind velocity and turbulence leeward. In this work, three fences with porosity of 23%, 35% and 45% have been tested under 10m/s inlet velocity ... -
Numerical Simulation of Non-normal Wind Load on Porous Fences
(Journal article; Peer reviewed; Tidsskriftartikkel, 2017)This paper presents a numerical simulation of non-normal wind loads on a porous fence. It was found that non-normal wind load has significant impact on the performance of the fence in terms. The performance of the fence was measured as the effective fence zone behind the fence where flow characteristics and normal drag coefficients were maintained within safe level. It is recommended the incidental ... -
Numerical study on the ventilation performance of a livestock house built in porous panels in Cold Regions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-11)This paper presents a numerical prediction on the assessment of natural ventilation on a livestock house built in porous panels, aided by Computational Fluid Dynamics techniques. A typical climatic environment in Cold Regions was taken into consideration. The ventilation performances have been assessed by the distribution of indoor air velocity, turbulence intensity and local mean age of air through ... -
Numerical study on the ventilation performance of a livestock house built in porous panels in Cold Regions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019)This paper presents a numerical prediction on the assessment of natural ventilation on a livestock house built in porous panels, aided by Computational Fluid Dynamics techniques. A typical climatic environment in Cold Regions was taken into consideration. The ventilation performances have been assessed by the distribution of indoor air velocity, turbulence intensity and local mean age of air through ...
