Experimental and numerical studies of thermal convection have shown that sufficiently vigorous convective flows exhibit a large-scale thermal wind component sweeping along small-scale thermal boundary layer instabilities. A characteristic feature of these flows is an intermittent behavior in the form of irregular reversals in the orientation of the large-scale circulation. There have been sever...

Abstract This experimental study investigates the effects of internal geometry modifications on performance a curved Sweeping Jet actuator. The are applied to feedback channel and mixing chamber Coanda surface, resulting actuator properties evaluated using time-resolved static pressure measurements inside hot-wire external flow. major result is that small, localized sweeping jet can lead comple...

Vapor transfer is an important phenomenon in various thermally driven membrane processes such as membrane distillation (MD), membrane evaporation and membrane condensation. In this study, we explore the mass transfer phenomena in sweeping gas membrane distillation (SGMD) by systematically investigating the effects of operational parameters on the process performance. It is found that mass trans...

Two different approaches are used for evaluating two-time correlations of Fourier velocity modes in isotropic, and in rotating, homogeneous incompressible turbulence. A synthetic model is proposed and compared with the results of direct numerical simulations. This kinematic model presents the advantage to incorporate different sources of unsteadiness, from arbitrary timescales to linear dynamic...

There is little disagreement among most economists that countries benefit from trade liberalization. Yet, whether unilateral, multilateral (through the World Trade Organization) or through regional integration agreements (RIAs), trade liberalization has been one of the most controversial economic issues of our time. It is the focus of everyone from politicians to union leaders and anti-globaliz...

In [F. Li, C.-W. Shu, Y.-T. Zhang, H. Zhao, Journal of Computational Physics 227 (2008) 81918208], we developed a fast sweeping method based on a hybrid local solver which is a combination of a discontinuous Galerkin (DG) finite element solver and a first order finite difference solver for Eikonal equations. The method has second order accuracy in the L norm and a very fast convergence speed, b...

A review of recent experimental studies of turbulence suppression by mean flows in quasi-two-dimensional fluids is presented. Large-scale mean flows develop during spectral condensation of 2D turbulence as a result of the inverse energy cascade in spatially bounded flow. The spectral energy which is accumulated at the largest scale supports the mean flow which in turn affects turbulence. We sho...

2 International Political Economy (IPE) is a relatively new sub-discipline within Political Science. The first textbook in the area was published in 1977 (Spero 1977), and regularly scheduled undergraduate and graduate courses were not routinely offered until the middle 1980s. Even today, the boundaries of IPE are not always clear – the overlap with political economy research in Comparative Pol...