%0 Journal Article
%T PERIODIC AND CHAOTIC SOLUTIONS OF CONVECTION IN POROUS MEDIA<br>多孔介质中对流的周期性解与混沌
%A Kong Xiangyan
%A She Min
%A <br>孔祥言
%A 佘敏
%J 力学学报
%D 1997
%I 
%X Convective heat transfer in a porous medium with uniform internal heat generation per unit volume q is studied. Evolution of convection with the lapse of time at various Rayleigh numbers is investigated by higher order defference techniques (effect of tilted angle is properly studied for comparison). Convection is computed up to about Ra=16 000 . The results show that the convection is stable at small Ra , and becomes periodic when Ra is increased to 4 600, as Ra is further increased there are some windows of chaos. For the tilting cases, intermittent phenomenon occurs.
%K convection
%K porous media
%K periodic oscillation
%K chaos
%K intermittent phenomenon<br>自然对流
%K 多孔介质
%K 周期振荡
%K 混沌
%K 阵发性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=4100DA4A1A3BA1B0CE5AD99AE1DFB420&aid=AE6D6FBC5E5081ACCAD0042B072A6050&yid=5370399DC954B911&vid=771469D9D58C34FF&iid=B31275AF3241DB2D&sid=04FC77FB58A9B53A&eid=8DDBA6455F2E3ECF&journal_id=0459-1879&journal_name=力学学报&referenced_num=5&reference_num=2