Turbulent flow in a model plant canopy
Turbulent flow in a model plant canopy
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植物冠层模型中的湍流
DOI：
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发表时间：
1976
期刊：
影响因子：
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通讯作者：
John Finnigan
中科院分区：
文献类型：
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作者：
I. Seginer;P. Mulhearn;E. F. Bradley;John Finnigan
在风洞中使用了一组细长的垂直圆柱形杆子来模拟植物的树冠。湍流测量是用一根十字热线进行的，既有天棚内部的，也有天棚上方的。当树冠的顶部被木板覆盖时，也在树冠内部进行了测量，在树冠上方没有留下任何空间。结果表明，在风速分布为指数型、湍流强度、偏斜度和混合长度沿(非封闭)冠层高度恒定的情况下，杆状涡旋对冠层内观测到的湍流贡献较小，但很明显。
An array of slender, vertical, cylindrical rods was used in a wind tunnel to simulate a plant canopy. Turbulence measurements were made with a cross hot wire, both inside and above the canopy. Measurements were also made inside the canopy when its top was covered by boards, leaving no space above the rods. This artificially confined canopy provided reference data.The results show an exponential wind profile and constant turbulence intensity, skewness and mixing length along the height of the (unconfined) canopy, the contribution of the eddies shed by the rods to the turbulence observed inside the canopy was small, but clearly apparent.