本文選題：側(cè)向局部加熱　切入點：周期性　出處：《力學(xué)季刊》2016年01期

【摘要】：通過二維流體力學(xué)基本方程組數(shù)值模擬,研究了Pr=6.949時側(cè)向局部加熱腔體內(nèi)不同格拉曉夫數(shù)Gr對對流結(jié)構(gòu)的影響.發(fā)現(xiàn)隨著格拉曉夫數(shù)Gr增加出現(xiàn)以下四種情況:準定常流→單局部周期滾動→雙局部周期滾動→定常流.還分析了周期對流階段的對流特性.隨著格拉曉夫數(shù)Gr增大,對流卷隨時間移動的周期減小.隨Gr增大,在0≤≤Y 5.2和0.5≤≤Y 5.7范圍內(nèi)對流卷逐漸消失,在5.2≤≤Y5和5.7≤≤Y10范圍內(nèi)對流卷由單對流卷變?yōu)槎鄬α骶?
[Abstract]:The effects of different Graschev numbers Gr on the convection structure in a laterally heated cavity with Pr6.949 were studied by numerical simulation of the basic equations of two-dimensional hydrodynamics.It is found that with the increase of Graschev number Gr there are four cases: quasi steady flow with single local periodic rolling and double local periodic rolling steady flow.The convection characteristics of periodic convection are also analyzed.With the increase of Gr, the period of convection volume moving with time decreases.With the increase of Gr, the convection volume gradually disappears in the range of 0 鈮，

本文編號：1713714