convection term 中文意思是什麼
convection term
解釋
對流項- convection : n. 1. 傳送。2. 【物理學】運流，環流；【氣象學】對流，上升氣流。
- term : n 1 期限，期間。2 學期，任期；（支付）結算期；【法律】開庭期，（權利的）有效期間；定期租借（地產...
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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，對微分方程的離散採用顯式格式、對流項採用高階迎風差分格式、擴散項應用中心差分格式。 -
In order to advance the sst turbulence equations at the same rate as the flow equations, a point - implicit scheme is used. the convection term in turbulence equations is discretized using first - order upwinding scheme to ensure more stability in time integration and the positivity of the turbulent variables
Sst湍流方程求解時，使用點隱式格式進行時間推進從而解除了由於源項存在所引起的時間步長的限制，保證湍流方程和流動方程同步推進時的穩定性。 -
These mean images reveal not only the synoptic cloud systems but also the mesoscale convective cloud cluster. the long - term high water level of mid - yangtze river and the frequent flood peak of the upper yangtze river from the middle of june to the middle of august in 1998 was caused by the high frequent activity of convection
旬月和季平均雲圖表明，長江上游從6月中旬開始到8月中旬長達兩個多月對流的頻繁發生是「 98洪水」長江上游洪峰多，中游高水位維持時間長的重要原因。 -
This feature reflects the physical phenomenon of breaking of waves and development of shock waves. in the fields of fulid dynamics, ( 0. 2. 1 ) is an approximation of small visvosity phenomenon. if viscosity ( or the diffusion term, two derivatives ) are added to ( 0. 2. 1 ), it can be researched in the classical way which say that the solutions become very smooth immediately even for coarse inital data because of the diffusion of viscosity. a natural idea ( method of regularity ) is obtained as follows : solutions of the viscous convection - diffusion pr oblem approachs to the solutions of ( 0. 2. 1 ) when the viscosity goes to zeros. another method is numerical method such as difference methods, finite element method, spectrum method or finite volume method etc. numerical solutions which is constructed from the numerical scheme approximate to the solutions of the hyperbolic con - ervation laws ( 0. 2. 1 ) as the discretation parameter goes to zero. the aim of these two methods is to construct approximate solutions and then to conside the stability of approximate so - lutions ( i, e. the upper bound of approximate solutions in the suitable norms, especally for that independent of the approximate parameters ). using the compactness framework ( such as bv compactness, l1 compactness and compensated compactness etc ) and the fact that the truncation is small, the approximate function consquence approch to a function which is exactly the solutions of ( 0. 2. 1 ) in some sense of definiton
當考慮粘性后，即在數學上反映為（ 0 . 1 . 1 ）中多了擴散項（二階導數項） ，即使很粗糙的初始數據，解在瞬間內變的很光滑，這由於流體的粘性擴散引起，這種對流-擴散問題可用古典的微分方程來研究。自然的想法就是當粘性趨于零時，帶粘性的對流-擴散問題的解在某意義下趨于無粘性問題（ 0 . 1 . 1 ）的解，這就是正則化方法。另一辦法從離散（數值）角度上研究僅有對流項的守恆律（ 0 . 1 . 1 ） ，如構造它的差分格式，甚至更一般的有限體積格式，有限元及譜方法等，從這些格式構造近似解（常表現為分片多項式）來逼近原守恆律的解。 -
Using time splitted algorithm, the convection term is solved with tvd method and the chemical reaction is dealt with elementary reaction model
對流項和化學反應項採用時間分裂法，分別用tvd格式和基元反應模型進行處理。 -
By comparing convection term difference scheme of cd and quick, it is found that there is no obvious difference between these two schemes, and cd scheme is a little better
通過對流項差分格式cd格式和側mck格式比較，發現兩種格式計算差別不大， cd格式略好於quick格式。
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