lu factorization中文什么意思

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The explicit method is widely used for its simpleness and little memory consumed with local time step and variable coefficients implicit residual smooth to accelerate the convergence procedure . according to yoon and jameson ' s ideas , an efficient implicit lu - sgs algorithm is carefully constructed by combing the advantages of lu factorization and symmetric - gauss - seidel technique in such a way to make use the l and u operators scalar diagonal matrices , thus the numeric algorithm requires only scalar inversion . the computational efficiency is greatly improved with this scheme
顯式方法具有簡單，消耗內(nèi)存小等優(yōu)點(diǎn)，并采用當(dāng)?shù)貢r(shí)間步長、變系數(shù)隱式殘值光順等加速收斂措施，在定常流動(dòng)的模擬中得到了廣泛的應(yīng)用;根據(jù)yoon和jameson提出的簡化正、負(fù)矩陣分裂，構(gòu)造的l 、 u算子只需進(jìn)行標(biāo)量對(duì)角陣求逆，極大提高了流場數(shù)值求解過程的計(jì)算效率;采用newton類型的偽時(shí)間子迭代技術(shù)使時(shí)間推進(jìn)精度提高至二階。

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