發(fā)布時(shí)間：2018-11-15 15:54

【摘要】：利用Simple算法對(duì)流體力學(xué)基本方程組進(jìn)行了數(shù)值模擬,研究了擺動(dòng)行波的特性。結(jié)果表明:在擺動(dòng)行波存在的范圍內(nèi),當(dāng)相對(duì)瑞利數(shù)r較小時(shí),腔體內(nèi)沿著空間的平均波數(shù)是隨著時(shí)間周期變化的;當(dāng)r較大時(shí),腔體內(nèi)沿著空間的平均波數(shù)隨著時(shí)間增大保持為常數(shù)。擺動(dòng)行波的擺動(dòng)周期隨r的增大而減小;分離比負(fù)值越大,變化越平緩,擺動(dòng)行波出現(xiàn)的范圍越大。隨著長(zhǎng)高比增加,較小分離比時(shí),擺動(dòng)周期的上、下限明顯提高;分離比較大時(shí),擺動(dòng)行波存在區(qū)間對(duì)應(yīng)的r上、下限明顯增加。
[Abstract]:The basic equations of hydrodynamics are numerically simulated by Simple algorithm, and the characteristics of oscillating traveling waves are studied. The results show that when the relative Rayleigh number r is small, the average wave number in the cavity changes with the time period in the range of oscillating traveling waves. When r is larger, the average wave number in the cavity keeps constant with time. The wobble period of wobble traveling wave decreases with the increase of r, and the greater the negative value of separation ratio, the more gentle the variation is, and the larger the range of wobble traveling wave appears. With the increase of the ratio of length to height, the upper and lower limits of wobble period increase obviously when the separation ratio is small, and the lower bound of wobble traveling wave increases obviously when the separation ratio is large.
【作者單位】： 西安理工大學(xué)西北旱區(qū)生態(tài)水利工程國(guó)家重點(diǎn)實(shí)驗(yàn)室培育基地;嘉興學(xué)院建筑工程學(xué)院;中水珠江規(guī)劃勘測(cè)設(shè)計(jì)有限公司;上海大學(xué)建筑系;
【基金】：國(guó)家自然科學(xué)基金(10872164) 陜西省重點(diǎn)學(xué)科建設(shè)專(zhuān)項(xiàng)資金(00X901)
【分類(lèi)號(hào)】：O35

【相似文獻(xiàn)】

相關(guān)期刊論文 前2條

1 寧利中;齊昕;余荔;郝建武;李國(guó)棟;;兩種類(lèi)型的擺動(dòng)行波對(duì)流[J];水動(dòng)力學(xué)研究與進(jìn)展A輯;2011年05期

2 寧利中;齊昕;周洋;余荔;;混合流體Rayleigh-Benard行波對(duì)流中的缺陷結(jié)構(gòu)[J];物理學(xué)報(bào);2009年04期

，

本文編號(hào)：2333741