相互作用暗能量模型的研究现状

本文简要介绍了相互作用暗能量模型研究的最新进展。首先介绍了几种目前比较流行的相互作用暗能量模型,接着详细分析了国内外在该领域的研究现状及发展动态。其中,针对大尺度不稳定性问题,本文着重强调了用来处理相互作用暗能量宇宙学扰动的参数化后弗里德曼(parametrized post-Friedmann,简称PPF)方法。研究表明该方法能够成功地在相互作用暗能量模型全部参数空间中消除其大尺度不稳定性问题。

Orientation-dependent Hydrodynamic Instabilities from Chemo-Marangoni Cells to Large Scale Interfacial Deformations

The interplay between chemistry and interfacial-tension-driven hydrodynamic instabilities has been studied experimentally. The system on hand consists of two immiscible liquids separated along an initially plane interface at which an interfacial reaction takes place to produce in situ a surfactant. It is identified that the dynamics of the system depends on the orientation of the Hele-Shaw cell with respect to the vector of gravity. If the nele-Shaw cell is placed vertically, Marangoni cells with vigorous convection develop in both phases along a nearly planar interface. However, if the Hele-Shaw cell is tilted off the gravity, the instabilities in the system are characterized by the large scale interracial deformation with a spatio-temporal periodicity together with the chemo-Marangoni convection. The focus is on the exploration of the transition from the cellular mode to the large scale interfacial deformation.