direct numerical simulation 中文意思是什麼

direct numerical simulation 解釋
數模擬
  • direct : adj 1 筆直的，一直線的；正面的。2 直接的。3 直截了當的，直率的，明白的。4 直系的，正統的。5 【語...
  • numerical : adj 數字的；數值的；用數字表示的。 （a） numerical order 號數。 a numerical statement 統計。 the ...
  • simulation : n. 假裝；模擬；裝病，裝瘋；【生物學】擬態，擬色。
  1. The welding technology of francis turbine runners is optimized from the view of subsection welding and local heating by numerical simulation. the result shows that welding residual tensile stress appears in the weld and its area nearby, and peak stress appears in the dangerous area of blades after practising quondam welding technology ; welding residual tensile peak stress in the dangerous area of blades can be decreased by welding both ends earlier and then welding middle section later during subsection welding, and decreasing effect on welding residual stress of the subsection welding is related to the weld length of blade outlets and welding direction of each subsection ; decreasing effect on residual stress of the local heating is direct proportional to heating time, heating temperature, heating area, and inversely proportional to cooling area, and welding residual tensile peak stress in the dangerous area is decreasing trend earlier, and then increasing trend later with heated location increased

    本文利用數值模擬手段對轉輪的焊接工藝從分段焊和局部加熱兩個方面進行了優化，結果表明:採用普通工藝焊接時，葉片焊后殘余拉應力出現在焊縫及其附近區域，並且在葉片出水邊的熔合線附近（危險區域）出現了峰值;在採用優化的分段焊時，先焊兩端后焊中間的方法可以降低葉片危險區域的焊接殘余拉應力峰值，降低效果與葉片出水邊焊段長度、焊縫各段的焊接方向有關;局部加熱法降低轉輪危險區域殘余應力的效果主要與加熱時間、加熱溫度以及加熱面積成正比，與冷卻面積成反比，並且危險區域的殘余應力隨加熱區域的增大呈先降低后升高的趨勢。
  2. Direct numerical simulation of spatial evolutional transition in pipe flow

    空間發展圓管轉捩的直接數值模擬
  3. Direct numerical flow simulation in a two - dimensional turbine cascade

    二維渦輪葉柵流場的直接數值模擬
  4. ( 4 ) the drag reduction of plane - surfaces with v - shaped grooves is given out by direct numerical simulation, and the drag reduction mechanism in the base of the secondary flow theory is suggested

    （ 4 ）利用直接數值模擬方法求得平板上v ?型條紋表面上的降阻情況，並給出基於二次流動理論的降阻機理。
  5. Numerical simulation method for enhancing waterflooding efficiency using direct current electric field

    直流電場提高水驅油效率的數值模擬方法
  6. Up to now, studies about round and rectangular jets are prolific. however, numerical studies of plane jets, especially the dns ( direct numerical simulation ) data which bear profound significances on turbulence research, are considerably few

    迄今為止，關于圓射流和矩形射流的研究較多，但平面射流的數值成果，尤其是對湍流研究具有指導意義的dns數據，仍相對較少。
  7. The direct numerical simulation methods for turbulent spots in the channel, open - channel and boundary layer flows are built respectively. effective algorithms composed of time - advancing, over - relax iteration and multiple grid methods are planned to raise computational efficiency

    分別建立了適用於在槽道、明渠和平板邊界層流動中直接模擬湍斑的數值方法，並精心設計了時間推進、超鬆弛迭代和多重網格等高效演算法，以提高計算效率。
  8. Numerical simulation and analysis of pulsed direct current brazing temperature field with computer

    脈沖直流電弧釬焊溫度場計算機模擬及分析
  9. Mm5 adjoint - model assimilation system not only can improve the initial field effectively and promote the coordination with the model but also can enhance the forecast on the precipitation and other elements. the assimilation of cdw has an improvement on quality of upper wind. the effect of direct numerical simulation with utilizing the cdw to amend the initial field gains the advantage over the one not

    結果表明， mm5伴隨模式同化系統能有效改善初始場與模式的協調能力，提高模式對于降水場和其它要素場的預報；使用雲導風資料修正初始場后直接模擬的效果比未使用時直接模擬的效果要好，對部分區域的強降水預報精度有一定程度的改善；使用伴隨模式同化系統后，加入雲導風資料的同化試驗對其它要素的改善與直接同化常規資料的效果相比，改善優勢不明顯，但從各要素的誤差來看，對于風場的改善最好。
  10. The objective of present work is to explore the fully developed turbulent flow in a cylindrical smooth pipe by means of direct numerical simulation

    本文採用直接數值模擬的方法對光滑圓管充分發展湍流進行了研究。
  11. Numerical simulation and analysis of the temperature field for direct current gtaw arc brazing

    電弧釬焊溫度場的數值模擬及分析
  12. Transport phenomena and numerical simulation related to water in direct methanol fuel cell

    直接甲醇燃料電池中的涉水傳遞現象及數值模擬
  13. Direct numerical simulation of flow field with threedimensional planar mixed layers

    三維平面混合層流場的
  14. Direct numerical simulation and experimental verification of the three - dimensional mixing layer

    三維混合層的直接數值模擬和實驗驗證
  15. Direct numerical simulation is used for solving the navier - stokes equation and lagrangian approach is used to track the bubble trajectories through the action of forces imposed by the fluid and the gravity

    採用直接數值模擬方法模擬流體流動，並用拉格朗日法跟蹤氣泡受流體和重力作用所產生的運動軌跡。
  16. Direct numerical simulation of gas - solid two - phase mixing layer

    氣固兩相平面混合層的直接數值模擬
  17. Direct numerical simulation of turbulent flow and heat transfer in square duct with steady natural convection in cross section

    具有截面自然對流通道內湍流換熱的直接數值模擬
  18. With the development of the computer, some results on large eddy simulation and direct numerical simulation are achieved

    隨著計算機的發展，大渦和直接數值模擬也取得了一些研究成果。
  19. Direct numerical simulation of the two - way coupling effects between particles and fluid in the three - dimensional particle - laden mixing layer

    直接數值模擬三維氣固兩相混合層中顆粒與流體的雙向耦合
  20. The present work is carried out by direct numerical simulation ( dns ), the non - linear navier - stokes equation is formulated in terms of spectral method with fringe method. the objective of present work is to explore the spatial and temporal evolution of pipe flow with the disturbance imposed on the pipe wall in the form of periodic suction and blowing ( psb )

    本文使用直接數值模擬（ dns ）方法，通過譜方法結合嵌邊法求解非線性的navier - stokes方程，來研究由圓管壁面引入的周期性吹吸（ psb ）擾動作用下，圓管流動沿流向的空間演化規律及其相應的時間演化過程。
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