流阻

Among these are a heart-stopping rendition of the previously unreleased 'Gitardjamm', filmed inside a derelict herring oil tank in the far West Fjords; a windblown, one-mic recording of 'Vaka', shot at a dam protest camp subsequently drowned by rising water; and first time acoustic versions of such rare live beauties as 'Staralfur', 'Agaetis Byrjun' and 'Von'.

其中的一些就是尚未发行的《Gitardjamm》中压心的演奏，在远西峡的一个遗弃了的窄油槽*中拍摄；一段风吹，《Vaka》中用单话筒录下的，在一水坝阻流营地拍摄；以及像《Staralfur》《ág？tis Byrjun》(1999.6)和《Von》(冰岛1997，英国2004.9，美国2004.10，Sigur Rós首张专辑)这样极罕见的难忘美好的首个非电版*。

Firstly, saltating sand grains in various height layers mostly rotate clockwise; the rate of counterclockwise rotation changes from 16.7 to 33.3% for three different friction wind speed (u*= 0.67, 0.83, and 0.87 m/s). However, their mean rotational speeds were not significantly different, irrespective of whether the grains rotated clockwise or counterclockwise. The mean counterclockwise rotational speeds of sand grains for friction wind speed u*= 0.67, 0.83, and 0.87 m/s were 427, 519, and 604 rev/s, versus 429, 522, and 609 rev/s, respectively, in the clockwise direction.

首先，风沙流中各高度层内跃移沙粒旋转均以顺时针方向为主，逆时针方向旋转的沙粒数仅占总数的16.7-29.5%，但是无论逆时针还是顺时针旋转的沙粒，它们的平均旋转速度几乎没有差别(如u*＝0.67 m/s时，分别为427 rev/s和429 rev/s；u*＝0.83 m/s，分别为519 rev/s和522 rev/s；u*＝0.87 m/s，分别为604 rev/s和609 rev/s)；不同摩阻风速条件下各高度层内沙粒的旋转速度均服从Lorentzian分布。

The flow in the vicinity of riblets is investigated numerically by a vorticity formulation, and two drag reducing features of riblets are obtained and analyzed.

2利用涡理论方法对近壁面流场进行数值计算，得到层流和湍流状态下的两组降阻曲线，并加以分析。

The results of simulation show that a series of "second-vortex" are produced when streamwise "reverse-vortices" are effected by riblets. They weaken intensities of "reverse-vortices", and restrain the productions and developments of low-flow strips, so turbulent drag reduction is obtained.

仿真结果表明，沟槽表面与顺流的&反向旋转涡对&相互作用，产生&二次涡&，削弱了&反向旋转涡对&的强度，进而抑制了低速条带的形成和发展，从而降低湍流猝发强度，实现湍流减阻。

And then fill with water distribution, hydrophilicity, and Drag the small, high temperature, low temperature resistance, such as the excellent performance. 5, cooling tower chassis plate used for water catchment, and with automatic, manual cloth water, overflow, sewage and other devices, can be used for closed-cycle pool use without a separate pool.

填料具有水的再分布均匀，亲水性好、风阻小、耐高温、抗低温等的优良性能。5、冷却塔底盘可作集水盘用，并配有自动、手动布水、溢流、排污等装置，可作闭式循环水池使用，无需另设水池。

Furthermore, the model was applied to the simulation of the spontaneous condensation in two-phase vortex tube, and the effect of slenderness ratio, diffuser, pressure ratio and cold mass fraction on separation performance has been predicted.

应用该模型对含湿气体在涡流管内的自发凝结过程进行了模拟。通过分析凝结参数的变化，预测了基本结构参数长径比、阻涡器与操作参数压比、冷流率对装置分离性能的影响。

The effect of slenderness ratio, diffuser, pressure ratio and cold mass fraction on separation performance was analyzed and the result tallied with the simulation, which proved that this paper can provide theoretical and experimental basis for industry.

分析了基本结构参数长径比、阻涡器与操作参数压比、冷流率对分离性能的影响，实验数据与数值模拟分析结果吻合较好，为两相涡流管的工业应用提供了理论与实验依据。

The resistivity-temperature curve can be predicted by using this mathematical model, which was in good agreement with the experimental data when the CB volume fraction is close to the critical volume fraction.

利用这个数学模型，还对两种PTC材料的阻温曲线进行了预测，与实测结果比较发现，当炭黑含量在渗流阈值附近时，预测值与实测数据吻合很好。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐