Official Journal of the Japan Wood Research Society
Table 3 Coefficients of the relational expression of moisture content and change rate of velocity
Measurement position | n a | V 0 (m s−1) | V u /V 0 = pu + 1 | V u /V 0 = qu + r | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
p (1/%) | q (1/%) | r | ||||||||
Present | Pith | 6 | 5302 | (312) | −0.00645 | (0.00061) | −0.00215 | (0.00038) | 0.8796 | (0.0277) |
Mature wood | 6 | 5390 | (309) | −0.00586 | (0.00056) | −0.00218 | (0.00035) | 0.8970 | (0.0257) | |
Average | 6 | 5346 | (309) | −0.00616 | (0.00057) | −0.00216 | (0.00036) | 0.8880 | (0.0262) | |
Guanb | Heartwood | 1 | – | −0.00541 | −0.00161 | 0.8895 | ||||
Sapwood | 1 | – | −0.00396 | −0.00108 | 0.8979 | |||||
Overall | 2 | – | −0.00498 | −0.00123 | 0.8836 | |||||