mixed convection 中文意思是什麼
mixed convection
解釋
混合對流- mixed : adj 1 混成的，混合的。2 混雜的，各式各樣的。3 男女混合（成）的；各階層混合成的。4 〈英國〉男女同...
- convection : n. 1. 傳送。2. 【物理學】運流，環流；【氣象學】對流，上升氣流。
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In this paper, a crank - nicolson mixed element method, a nonlinear galerkin mixed element method for the non stationary conduction - convection problems time second order accuracy fully discrete formats and a two - level mixed element method with backtracing for the stationary conduction - convection problems are presented and analyed, respectively, an error analysis are provided for the crank - nicolson method of time discretization applied to spatially discrete galerkin mixed element approximations of the nonstationary conduction - convection problems
本文分別給出了非定常的熱傳導-對流問題的crank - nicolson混合元法時間二階精度全離散格式，非線性galerkin混合元法時間二階精度全離散格式以及定常的熱傳導-對流問題回溯二重水平法。討論了時間上的crank - nicolson離散方法應用於非定常的熱傳導-對流問題的空間離散的galerkin混合元近似。 -
Based on the review, the fluid flow and heat transfer in the curved circular and rectangular pipes have been researched by employing perturbation method and numerical simulation with a physical model under the rotational orthogonal curvilinear coordinate in a rotating curvilinear pipe with multi - parameters. we firstly analyzed the fully developed fluid flow and heat transfer, mixed convection heat transfer, the development of flow and heat transfer in the inlet in different cross section ( circular, elliptical, annular and rectangular crossection ). the variations of the secondary flow, axial velocity, distribution of temperature, the friction force on the wall, the ratio of friction factor as well as the nusselt number with different dimensionless parameters had been examined in detailed
本文在總結和分析了一個世紀以來有關曲線管道流動和換熱特性的研究成果的基礎上，以旋轉正交曲線坐標系統下的多參數旋轉螺旋管道中的對流傳熱為物理模型，通過攝動方法和有限體積法，首次對各種截面（圓截面、橢圓截面、環形截面、矩形截面）旋轉曲線管道內充分發展流動的流動結構和傳熱特性（包括耦合對流傳熱特性）以及旋轉曲線管道開口段發展流動的流動結構和換熱特性進行了系統的數值模擬和理論分析，詳細討論了各種無量綱參數對管道內軸向速度分佈、二次流結構、溫度分佈、壁面摩擦力、摩擦系數比以及管道nusselt數的影響，獲得了若干創新性成果。 -
At first, a two - dimensional across - the - channel mathematical model for simulation of a direct methanol fuel cell is described. the model accounts simultaneously for electrochemical kinetics, hydrodynamics, and multicomponent transport, and fully accounts for the mixed potential effects of methanol oxidation at the cathode as a result of methanol crossover caused by convection, diffusion and electro - osmosis
首先描述了一個用於模擬直接甲醇燃料電池特性的垂直於流道的二維數學模型，模型考慮了多組分傳遞、水動力學和電化學動力學，並且考慮了甲醇竄流在電池陰極產生的混合電位的影響。 -
In chapter one, we propose a new mixed method called characteristics mixed finite element method for a convection - dominated diffusion problems with small parameter e : we handle the convection part whth backward difference scheme along the characteristics, obtain much smaller time - trunction errors and avoid numerical dispersion on the front of the peak curve of the flow : we use a lowest order mixed finite element method to deal with the diffusion part, so this scheme can approximate the unknow function and its following vector with high accuracy at the same time
第一章中我們對小參數對流占優擴散問題提出了新的數值方法? ?特徵混合有限元方法，即對方程的對流部分採用沿特徵線的後退差分格式求解，以保證較小的截斷誤差限並避免了在流動的鋒線前沿數值彌散現象的出現；對流動的擴散部分採用最低次混合元方法求解，以保證格式對未知函數及伴隨向量的同時高精度逼近。由於該方法中檢驗函數可取分片常數，此格式在某種意義上具有局部守恆性質。 -
A lowest order characteristics - mixed finite element method for convection - dominated diffusion problems with small parameter
小參數對流占優擴散問題的最低次特徵混合有限元方法 -
The characteristic approximation is used to handle the convection part along the direc - tion of fluid namely characteristic direction to ensure the high stability of the method in approximating the sharp fronts and reduce the numerical diffusion ; the mixed finite element spatial approximation is employed to deal with diffusion part and approximate the scalar unknown and the adjoint vector function optimally and simultaneously ; in order to preserve the integral conservation of the method, we introduce the modified characteristic method
該方法對方程的對流部分沿流體流動的方向即特徵方向離散以保證格式在流動的鋒線前沿逼近的高穩定性，消除數值彌散現象；對方程的擴散部分採用最低次混合有限元方法離散、同時以高精度逼近未知函數及未知函數的梯度；為保證方法的整體守恆性，在格式中引入修正項 -
The new method is a combination of characteristic approximation to handle the convection part, to ensure the high stability of the method in approximating the sharp fronts and reduce the numerical diffusion, a smaller time truncation is gained at the same time, and a mixed finite element spatial approximation to deal with the diffusion part, the sealer unknown and the adjoint vector function are approximated optimally and simultaneously
此方法即為對方程的對流項沿流體流動的方向即特徵方向進行離散，從而保證格式在流動鋒線前沿逼近的高穩定性，消除了數值彌散現象，並得到了較小的時間截斷誤差；另一方面，對方程的擴散項採用混合元離散，可同時高精度逼近未知函數及其伴隨向量函數，理論分析表明，此方法是穩定的，具有最優的l ~ 2逼近精度。 -
The non - conforming mixed finite element method for the nonstationary conduction - convection problems
對流問題的非協調混合有限元法 -
A two - dimensional double diffusive laminar mixed convection, displacement ventilation, is fully investigated by the means of heat and contaminant transport structures to see the effects of the heat and pollutant sources and the external mechanical ventilation
作者以二維層流雙擴散混合對流模型? ?置換通風? ?進行了數值模擬與分析，並利用上述對流可視化技術來觀察熱源、污染源、外部機械通風三個因素對室內空氣環境的影響。 -
The existence and the convergence of the fully discrete format of nonlinear galerkin mixed element method with time second order accuracy for the non stationary conduction - convection problems are showen
給出了熱傳導-對流問題非線性galerkin全離散混合元解的存在性和收斂性。 -
To purse a high performance of an algorithm, we propose a new numerical scheme, called the characteristics - mixed finite element method, for approximating the solution to a convection - dominated diffusion equations of parabolic type
為克服傳統格式的上述缺陷，我們提出了求解對流占優問題的一種新型數值方法-特徵混合有限元方法。 -
A characteristic mixed method with dynamic finite - element space for nonlinear convection - dominated diffusion problems
非線性對流擴散問題的動態網格特徵混合元方法 -
In this paper, two - grid method is constructed. combined with the characteristics method, finite element method and mixed finite element method, for solving nonlinear convection - dominated equations. which can reduce the numerical oscillations of the convection - dominated equations and improve the computational efficiency
本文將特徵線方法、有限元方法和混合有限元方法相結合，構造了求解非線性特對流占優擴散方程的兩重網格演算法。
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