upwind adv.,adj.迎風向地[的]，逆風向地[的]。n.逆...
adv.,adj. 迎風向地[的]，逆風向地[的]。 n. 逆風。 “headwind；upwind“ 中文翻譯： 上風“upwind approach“ 中文翻譯： 逆風進場著陸“upwind direction“ 中文翻譯： 上風向“upwind district“ 中文翻譯： 逆風地區“upwind effect“ 中文翻譯： 上吹效應; 上風效應“upwind engine“ 中文翻譯： 迎風面發動機“upwind gear“ 中文翻譯： 迎風一側的起落架“upwind landing“ 中文翻譯： 逆風著陸“upwind leg“ 中文翻譯： 逆風邊; 起落航線第一邊“upwind of target“ 中文翻譯： 逆風目標“upwind position“ 中文翻譯： 逆風位置; 迎風位置“upwind range“ 中文翻譯： 逆風航程“upwind rotor“ 中文翻譯： 頂風葉輪“upwind side“ 中文翻譯： 上風面“upwind takeoff“ 中文翻譯： 逆風起飛“upwind taxiing“ 中文翻譯： 逆風滑行“upwind threshold“ 中文翻譯： 逆風跪道入口; 逆風跑道入口“upwind turn“ 中文翻譯： 逆風轉彎“upwind velocity“ 中文翻譯： 逆風流速“upstream scheme upwind scheme“ 中文翻譯： 迎風格式“upstreame scheme, upwind scheme“ 中文翻譯： 迎風格式“upwind difference formula“ 中文翻譯： 上風差分公式“upwind rotor position“ 中文翻譯： 頂風葉輪位置“upwind wind source of pollution“ 中文翻譯： 逆風污染物“upwelling zone“ 中文翻譯： 上涌帶“upwelling water“ 中文翻譯： 上涌泉水
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Abstract : in this paper , river water quality prediction is integrated with water pollution control measures . two parameters , water environmental capacity and pollution index are selected for pollution control measures . the objective is achieved after the development of simulation model using one - dimensional advection dispersion equation . the model algorithm and computer program is an improvement over the existing water quality models , since the model solution involves four point implicit upwind schemes for water quality prediction and pollution control measures at each grid point . model simulation results the assessment of water environmental capacity that yield the acceptable and realistic pollutants concentration in order to maintain water quality objectives . the pollution and overall pollution index of the river is suggested for integrating number of contaminants variables into one index . study provides the mathematical and scientific procedure for water quality management . the new approach is helpful for the water pollution control and to study the impacts of waste effluents on the river system for strategic planning purposes 文摘:本文將水質預測及水污染控制措施有機地結合,選取水環境容量和污染指數作為水污染控制的參數.這樣,一維對流-擴散水質方程的求解除就是實現本研究目的的關鍵.本研究采用的模型在現有的水質模型基礎上有所改進,因為其采用四點隱格式對水質進行預測,推求可接納污染物的環境容量值及為保證水質而限定的污染物濃度值,從而制定相應的水污染控制措施.為整體考慮各種污染物的情況,建議采用河流的污染指數進而推求綜合污染指數.總之,本研究為水質保護提供了科學的計算方法,該法對水污染控制及污水對河道水質的影響是實用有效的 |
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In this paper , the upwind scheme and the central scheme are presented for solving 3 - d n - s equations using the cell - center finite volume spatial discretization and four - stage runge - kutta time stepping scheme , with standard convergence acceleration techniques such as local time stepping and implicit residual smoothing 在n - s方程的數值計算上，采用了中心差分格式和迎風格式，用格心格式的有限體積法進行了空間離散，用四步龍格?庫塔法作顯式時間推進，并采用了當地時間步長和隱式殘差光順等加速收斂措施。 |
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In this paper , river water quality prediction is integrated with water pollution control measures . two parameters , water environmental capacity and pollution index are selected for pollution control measures . the objective is achieved after the development of simulation model using one - dimensional advection dispersion equation . the model algorithm and computer program is an improvement over the existing water quality models , since the model solution involves four point implicit upwind schemes for water quality prediction and pollution control measures at each grid point . model simulation results the assessment of water environmental capacity that yield the acceptable and realistic pollutants concentration in order to maintain water quality objectives . the pollution and overall pollution index of the river is suggested for integrating number of contaminants variables into one index . study provides the mathematical and scientific procedure for water quality management . the new approach is helpful for the water pollution control and to study the impacts of waste effluents on the river system for strategic planning purposes 本文將水質預測及水污染控制措施有機地結合,選取水環境容量和污染指數作為水污染控制的參數.這樣,一維對流-擴散水質方程的求解除就是實現本研究目的的關鍵.本研究采用的模型在現有的水質模型基礎上有所改進,因為其采用四點隱格式對水質進行預測,推求可接納污染物的環境容量值及為保證水質而限定的污染物濃度值,從而制定相應的水污染控制措施.為整體考慮各種污染物的情況,建議采用河流的污染指數進而推求綜合污染指數.總之,本研究為水質保護提供了科學的計算方法,該法對水污染控制及污水對河道水質的影響是實用有效的 |
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The fourth - order explicit upwind - biased compact difference schemes are used in the spatial discretization of the nonlinear convection terms . these difference schemes can be used in all computational region including the boundary neighborhood , and can overcome the difficulty not adapting simultaneously in the boundary neighborhood for general three - dimensional fourth - order central difference schemes , and improve computational stability a nd resolution . the compact difference equations with high accuracy and resolution for solving the incompressible n - s equations and perturbation equations are composed of these compact difference schemes , and provides an effective numerical method for the investigations of the turbulent spots and coherent structures 文中發展了四階時間分裂法用于navier - stokes方程及其擾動方程的時間離散；對分裂得出的關于壓力的poisson方程和關于速度的helmholtz方程，建立三維耦合四階緊致迎風差分格式；這些格式適用于包括鄰近邊界點在內的計算區域，克服了三維各自用四階中心差分格式離散不適用于邊界鄰域的困難，并提高了穩定性和分辨率，用這些格式分別組成了數值求解navier - stokes方程及其擾動方程的高精度、高分辨率的緊致差分方程組，為湍斑及湍流相干結構的研究提供了有效的數值方法。 |
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The model of fpsa ( inter - phase slip algorithm ) provided in phofvmcs , the software used in computational fluid dynamics , which solves the navier - stokes equations of each phase with the interphase interactions between two phase of water and air , including the interphase drag forces , interphase lift forces , interphase pressure and virtual mass forces , is employed with the difference scheme of upwind and the orthonormal grid 計算采用由phoenics (計算流體力學軟件)的ipsa (相間滑移算法)模型，應用upwind (迎風)格式和直角坐標網格。 ipsa模型對每一相求解n - s方程，并考慮水-氣體兩相間的相間互互作用，包括相間阻力、相間升力、相間壓力和虛質量力。 |
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Geographically speaking , haidian is located in an upwind position . construction and development of gas facilities are usually earlier than and given priority over other districts of the city . there are three kinds of gas facilities , namely , liquefied petroleum gas ( lpg ) , coal gas and natural gas 習慣上以此山為界，山之南稱山前，山之北稱山后，山后西山稱大西山，山前西山稱為小西山，西山農場至北安河一帶屬于燕山系統，巒峰巍峨、山勢陡峭，屬于中山山區。 |
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Taking m6 wing and f4 wing - body configuration as computational examples , some results by solving euler and n - s equations are presented . compared with the results of wind tunnel experiment , the results of n - s solver are much better than those of euler solver , and the upwind scheme is better than the central scheme in catching shock wave 本文以m6機翼和f4翼身組合體為算例，對euler方程和n - s方程的計算結果進行了比較，從算例上可以看出， n - s方程的計算結果更接近實驗值；對中心差分格式和迎風格式的比較，可以看出，在激波的捕捉方面，迎風格式比中心差分格式更精確。 |
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This paper applies kami ' s method to analyze conservative scheme in lagrangian coordinate , and then selects one of upwind schemes which do not show oscillations , finally applies it to construct high resolution scheme . numerical flux of one order scheme is used near interface , while numerical flux of high resolution scheme is adopted in other area 本文在對lagrange坐標系下的守恒型格式進行詳細分析后，甄選出不震蕩的一階迎風型格式，然后應用于lagrange坐標系下的高分辨率格式，在物質交界面處采用不震蕩的一階迎風型格式的數值通量，而在其余地方采用高分辨率格式的數值通量。 |
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The solution algorithm involves tracing the characteristic lines backwards in time from a upwind element of an interior point . two advanced mehtods , quasi - consistence and consistence hexahedral element method , for three - dimensional advective problem are developed . and comparison of these two methods with linear interpolating function method is implemented 當re 400時，流動明顯地具有二維性； re 800時，流動具有一定程度的三維性，而且出現了次回流區； re 1000時，流動則具有明顯的三維性。 |
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The discretization process is deduced in detail , and the final iteration formula is given . in the discretization equations , higher order upwind differencing scheme is introduced into the calculation of the convection flux , whereas as for diffusion term , a central differencing scheme is taken into account 文中就具體離散過程進行了推導，給出了最終的迭代公式，其中，對微分方程的離散采用顯式格式、對流項采用高階迎風差分格式、擴散項應用中心差分格式。 |
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In consideration of computation exactness and cost , the unstructured grid , rng k - e turbulence model , renold - averaged n - s equations and second order upwind scheme were used to solve 3d turbulence flows with and without secondary combustion of a experimental strutjet rbcc in ejecting mode 在綜合權衡精度和速度的基礎上選取非結構網格技術、 rngk -湍流模型、雷諾平均n ? s方程、二階上風顯式離散格式求解并研究了支板式rbcc引射模態三維燃燒流場。 |
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In addition , the paper uses first - order upwind scheme and second - order upwind scheme and quick scheme to compute convection . through comparison and analysis , the paper chooses second - order upwind scheme as discrete scheme of convection 此外，對流項的離散格式分別采用一階迎風格式、二階迎風格式及quick格式進行計算，通過對比分析確定二階迎風格式作為對流項離散格式。 |
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The control - equations were solved with upwind tvd algorithm and elemental chemical reaction model , with the point - implicit used to overcome the numerical stiffness of chemical reaction source term 數值結果顯示，當爆轟波平掠過惰性氣體界面時，形成了爆轟波、界面、透射激波以及稀疏波相互作用的現象。 |
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The best combination of size parameters of supported domain and sub - domain is obtained . upwind scheme is developed to eliminate the instability of solutions obtained by using mlpg approach . 2 分析了試函數構造的近似方法、節點和輔助點數量、多項式基函數位數和支撐域尺度對數值模擬結果的影響。 |
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The model of ipsa provided in phoenics is also adopted , a finite volume scheme is used in discretization of governing equations and upwind difference introduced in this paper 本文計算中采用由phoenics提供的ipsa相間滑移算法模型，應用有限體積法對方程進行離散，并應用迎風格式計算。 |
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7 . the upwind finite volume method based on flux vector splitting is investigated , especially the splitting scheme of steger - warming , van leer , roe and ausm + 研究了基于矢通量分裂的高分辨率迎風型有限體積法，重點研究了siegerwarming 、 vnleer 、 roe以及ausm ”分裂格式。 |
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For example , the artificial modification of rain at new york city may suggest a seeding activity just a few miles upwind of the metropolis 比如說，對紐約市進行人工降雨可能意味著在該市上風不過幾英里處進行一次撒播作業。 |
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The convergence and maximum principle of the mixed - upwind finite element methods for incompressible immiscible displacement in porous media 多孔介質中不可壓縮非溶混驅動問題之混合迎風有限元法的收斂性和最大值原理 |
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The modified upwind finite difference method for three dimensional problem for the transient behavior of semiconductor with heat conduction 三維熱傳導型半導體器件瞬態問題的修正迎風差分格式 |