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混合流体分离比对摆动行波的影响

发布时间:2018-11-15 15:54
【摘要】:利用Simple算法对流体力学基本方程组进行了数值模拟,研究了摆动行波的特性。结果表明:在摆动行波存在的范围内,当相对瑞利数r较小时,腔体内沿着空间的平均波数是随着时间周期变化的;当r较大时,腔体内沿着空间的平均波数随着时间增大保持为常数。摆动行波的摆动周期随r的增大而减小;分离比负值越大,变化越平缓,摆动行波出现的范围越大。随着长高比增加,较小分离比时,摆动周期的上、下限明显提高;分离比较大时,摆动行波存在区间对应的r上、下限明显增加。
[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.
【作者单位】: 西安理工大学西北旱区生态水利工程国家重点实验室培育基地;嘉兴学院建筑工程学院;中水珠江规划勘测设计有限公司;上海大学建筑系;
【基金】:国家自然科学基金(10872164) 陕西省重点学科建设专项资金(00X901)
【分类号】:O35

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