boundary layer

boundary layer的基本解释

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[计] 边界层

与boundary layer相关的网络例句 [注：此内容来源于网络，仅供参考]

Compared with the initial value problems of scalar conservation laws with smooth flux function, the global weak entropy solutions for the initial-boundary value problems of scalar conservation laws with weak discontinuous flux function include the following new interaction types: a rarefaction wave collides with the boundary and is absorbed compltetely or partially by the boundary; a rarefaction wave collides with the boundary and the boundary will reflect a contact or non-contact shock wave; a contact or non-contact shock wave collides with the boundary and is absorbed by the boundary; a contact or non-contact shock wave collides with the boundary and a new non-contact shock will rebound from the boundary simultaneously or later.

与具有光滑流函数的单个守恒律的初始值问题相比，具有弱间断流函数的单个守恒律初边值问题的整体弱熵解中包括下列新的相互作用类型：稀疏波碰到边界并被边界部分或全部吸收；稀疏波与边界相撞，边界反射出一个接触或非接触激波；接触或非接触激波碰到边界并被边界吸收；接触或非接触激波与边界相撞，边界同时或稍后反射出一个新的非接触激波。

However remarkable impacts were observed in the plantation in terms of community physiognomy,community structure,species composition,species richness,and biomass accumulation.1 Planting trees made community structure simple.Betula alnoidis plantation had three layers including a dominant arbor layer,a complex and well developed shrub layer and a poorly developed vine layer.The arbor layer contained few species and had a single layer.The mountain rain forest had 4 layers including the dominant arbor layer,shrub layer,grass layer and vine layer.The vine layer was well developed and very rich in species composition,and the arbor layer contained as many as 38 species that could be grouped into 3 layers.2 Sequenced by the important value,main species for the plantation and the nature forest were totally different,and the plantation had one dominant species while the nature forest contained many dominant species.3 Planting trees changed the community physiognomy.

但是人工种植西南桦林对群落的季相外貌、群落的结构、物种组成、物种丰富度以及生物量等方面有较大的影响。1人工造林使得群落结构简化，西南桦人工林的层次结构有3层，以乔木层占优势，并且有种类多而发达的灌木层，同时，藤本植物欠发达，但是乔木层树种单一，明显仅有一层；山地雨林的层次结构有4层，以乔木层占优势，还有灌木层、草本层和藤本植物，藤本植物种类多，十分发达；乔木层树种丰富，可达38种，乔木层还可分为3层。2人工造林较大程度地改变了群落的物种组成，根据重要值的大小排列，人工林和天然林的主要物种组成已经完全不同；并且人工林单优树种明显，而天然林就含有较多的优势树种。3人工造林改变了群落的外貌。

The saltation boundary layer is divided into an inner boundary layer in which the saltating particles exert significant force on the airflow, and an outer boundary layer in which saltating particles exert insignificant force on the airflow, but the out layer is affected by the inner boundary layer.

将风沙边界层划分为跃移颗粒所产生的阻力不可忽略的内边界层和跃移颗粒阻力可以忽略但受内边界层影响的外边界层，分别建立了内边界层和外边界层的风速廓线表达式。

与boundary layer相关的网络解释 [注：此内容来源于网络，仅供参考]

boundary layer：边界层

边界层 边界层(boundary layer)是高雷诺数绕流中紧贴物面的粘性力不可忽略的流动薄层,又称流动边界层、附面层. 这个概念由近代流体力学的奠基人,德国人Ludwig Prandtl于(边界层 边界层(boundary layer)是高雷诺数绕流中紧贴物面的粘性力不可忽略的流动薄层,

boundary layer：界面层

举例来说,假如是上旋球,球上方旋转的方向与球行进的方向相同,你应该注意到当球旋转时,它会携带一些空气界面层(Boundary Layer) 环绕着它,在球的上方因为迎风的关系造成空气界面层的堆积,这会造成球上方强大的乱流和压力,而迫使球往下,

boundary layer：界层

NASA的兰利研究中心(Langley Research Center)极音速计画负责人詹姆士E皮特曼(James Pittman)表示,他们已确定了3个关键的研究领域:进气式推进系统、材料和结构、边界层(Boundary Layer)控制.

boundary layer：附面层

强化层:Strengthened layer | 附面层:boundary layer | 自噪声:boundary-layer

laminar boundary layer：层流边界层

boundary layer 附面层有固壁的边界层. | laminar boundary layer 层流边界层 | turbulent boundary layer 湍流边界层