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Official Journal of the Asia Oceania Geosciences Society (AOGS)

Geoscience Letters Cover Image

Table 1 Parameters in the turbulent boundary layers over different rough surfaces

From: Wind tunnel measurements of turbulent boundary layer flows over arrays of ribs and cubes

Rough surfaces h (× 10−3 m) w (× 10−3 m) δ (× 10−3 m) U (m s−1) u * (m s−1) C d (× 10−3) d (× 10−3 m) z0 (× 10−3 m)
Rib-type arrays
 AR = 1/1 19 19 219 8.0 0.36 4.1 6.0 0.04
 AR = 1/2 19 38 244 8.0 0.45 6.5 6.9 0.44
 AR = 1/3 19 57 248 8.4 0.52 7.6 5.9 0.63
 AR = 1/4 19 76 283 8.5 0.56 8.7 7.0 0.81
 AR = 1/5 19 95 284 8.5 0.59 9.6 6.2 1.04
 AR = 1/6 19 114 294 8.5 0.60 9.9 6.1 0.98
 AR = 1/8 19 152 294 8.4 0.60 10.1 4.0 1.04
 AR = 1/10 19 190 304 9.1 0.65 10.1 8.3 0.80
 AR = 1/12 19 228 304 9.1 0.67 10.8 13.6 0.85
 AR = 1/15 19 285 293 9.0 0.64 10.1 11.6 0.73
Cube-type arrays
 h:l 11.4 16 135 10.0 0.42 3.6 5.2 0.02
 h:2l 11.4 32 165 10.9 0.53 4.8 5.8 0.08
 h:3l 11.4 48 165 10.8 0.54 4.9 5.3 0.09
 h:4l 11.4 64 165 10.8 0.56 5.5 5.6 0.13
 h:5l 11.4 80 160 10.6 0.54 5.2 5.4 0.11
 h:6l 11.4 96 165 10.6 0.54 5.1 5.3 0.10
 h:7l 11.4 112 160 10.6 0.53 5.0 5.0 0.09
 h:9l 11.4 144 155 10.7 0.51 4.5 4.8 0.06
 h:4l − D 21 64 190 10.8 0.60 6.3 5.8 0.23
 h:4l − T 30.6 64 215 11.1 0.66 7.1 5.1 0.37
 h:4l − Q 40.2 64 219 11.2 0.70 7.9 3.6 0.52