critical reynolds number 中文意思是什麼
critical reynolds number
解釋
臨界雷諾數-
The critical value of these parameters and that of flow pattern criterion reynolds number of newtonian fluid are equally possessed of the character irrelative to fluid rheological property
這些參數的臨界值與牛頓液體流態準數雷諾數的臨界值，同樣具有與液體流變性無關的特點。 -
For both newtonian flow and non - newtonian flow, the vortices are generated when the waviness of the bottom profile is beyond a critical number. by increasing the waviness, a second vortex can be generated. with the increasing of reynolds number, the symmetry of the streamlines at re = 0 is destroyed and the vortices are sloped and become larger
當波形板的波動度超出臨界值，波形板壁面上的流動出現流線分離，流動中有渦生成;增大波動度，流動中出現第二個渦; re = 0 ，流線在流場中對稱分佈;雷諾數增大，流線駐點在水平方向出現位置偏移，渦的范圍增大;對于非牛頓流體，隨著剪切變稀指數的減小，渦的作用范圍減小。 -
The experimental results of the flow characteristics of the mmc heat sink indicate that the critical reynolds number signifying the transition from laminar flow to turbulent flow is in advance ; under the same experimental conditions, the variation in entrance direction of the microchannel inlet and outlet has little effect on the microchannel ; the experimental values of the friction factor of the de - ionized water in a microchannel agree well with those calculated using the theoretical laminar formula ; furthermore, a comparison of the experimental results and simulation results shows that navier - stokes equation and rng - turbulence model can be used to model the laminar and turbulence flow regions in a microchannel ; meanwhile, the correlations of the flow resistance in the turbulent flow regions for the de - ionized water as the working fluids are obtained from experiments
對歧管式單通道熱沉流動特性的研究結果表明，微通道內流體流態由層流向紊流轉變的臨界雷諾數提前;改變流體的進出口方向對熱沉總壓降造成的影響很小;摩擦系數的實驗值與理論值較接近;數值模擬結果能夠與實驗值較好吻合;並由實驗給出了紊流區流動阻力的實驗關聯式。此外，選用十二烷基硫酸鈉（ sodiumdodecylsulphate ， sds ）以及烷基多糖苷（ alkylpolyglycoside ， apg ）作為減阻添加劑，研究了表面活性劑添加對微通道流動特性的影響。 -
Re = 200 is just beyond the critical reynolds number of mode a. the numerical results of the present paper indicate that the near wake at this supercritical reynolds number is in three - dimensional quasi - periodic laminar state with transitional behaviors
Re = 200是剛超過模式a的臨界雷諾數，計算結果表明，此時近尾跡流場處於三維準周期層流狀態。 -
Stability characteristics are obtained through numerical analysis. in general, the influence of fibre additives and their hydrodynamic interactions to the flow results in the increase of critical reynolds number and the reduction of unstable region of disturbances, therefore reinforces the flow stability
數值求解穩定性方程得到懸浮流的穩定性特徵，發現纖維參數h值和水動力相互作用系數c _ 1的增加導致流動臨界re數增大，不穩定擾動的最大增長率降低，擾動失穩范圍縮小。 -
Critical reynolds number
臨界雷諾數 -
The effect of the pressure gradient on critical reynolds number is also displayed and the influence rule of the different pressure fields on the flow stability is exploited
還研究了壓力梯度對臨界雷諾數的影響，探討了不同壓力場對流動穩定性作用的規律性。
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