roughness length

基本解釋

• 粗糙長度

英漢例句

雙語例句

• For the usual velocity profile method, four kinds of method are given: 1) Estimating roughness length from velocity time series of two near-bottom layers;
  針對使用較常見的流速剖面法，本文介紹了四種方法1） 近底兩層流速時(shí)間系列估計(jì)粗糙長度；
• Some relationships of roughness length, friction velocity and resistance coefficient with wind velocity and wave height in neutral stratification have been given.
  給出了中性層結(jié)時(shí)水面粗糙度、動(dòng)力摩擦速度及阻力系數(shù)與風(fēng)速和浪高的關(guān)系。
• A linear correlation exists between the current speed of adjacent layers, and the correlation is dependent on the height of the layer above the seabed, roughness length and shear velocity.
  相鄰層位的流速在時(shí)間序列上存在很高的線性關(guān)系，回歸直線的斜率與水層距底床的高度、粗糙長度和摩阻流速有關(guān)。

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詞組短語

短語

• surface roughness length 地面粗糙長度
• vapour roughness length 水汽粗糙度
• effective roughness length 有效粗糙度長度
• scalar roughness length 標(biāo)量粗糙度
• temperature roughness length 熱力粗糙度

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專業(yè)釋義

環(huán)境科學(xué)技術(shù)

• 粗糙度

  Wind velocity and roughness length influence the friction velocity, the range of average friction velocity is 0.0580.092m/s. The threshold friction velocity of the soil surface is about 0.082m/s, less than the surface covered by vegetation, sand, large particle.
  摩阻風(fēng)速受風(fēng)速和地表粗糙度的影響,日平均摩阻風(fēng)速最大變化范圍是0.058～0.092m/s。

  生物學(xué)

• 粗糙長度

  Calculated friction velocity caused by tidal current (u*_c)) is 0.39～6.8cm/s. Roughness length z_0=0.31cm.
  計(jì)算得出潮流摩阻流速u*_c。 范圍為0.39～6.8cm/s,粗糙長度Z0=0.31cm。

  水利工程

• 粗糙長度

地球科學(xué)

• 粗糙度長度
• 粗糙長度