Experiments compare long-range chaotic mixing of miscible and immiscible impurities in a time-periodic flow. For the miscible case, the transport is enhanced diffusion with an effective diffusion constant determined by lobes (turnstiles) that carry impurities between vortices. For the immiscible case, the impurity is broken into a distribution of droplets. If the characteristic droplet size is ...

Abstract Numerous studies have investigated the fundamental mechanisms by which CO 2 flooding can increase oil production altering properties of hydrocarbon fluid, including swelling, viscosity and interfacial tension reductions, extraction light-to-intermediate components. However, interactions between fluid may also cause several problems, such as asphaltene precipitation due to crude oil's i...

As the demands of tight-oil Enhanced Oil Recovery (EOR) and controlling anthropogenic carbon emission have become global challenges, Carbon Capture Utilization Sequestration (CCUS) has been recognized as an effective solution to resolve both needs. However, influential factors dioxide (CO2) geological storage in low permeability reservoirs not fully studied. Based on core samples from Huang-3 a...

Low-permeability near-critical volatile reservoirs are characterized by light oil, complex fluid phase, and strong reservoir inhomogeneity, etc. Purely injecting CO2 will create a series of problems, such as serious gas channeling, low sweep efficiency, oil recovery. Therefore, in this paper, through combination experiments simulations the process studying problem from simple to complex, we car...

Response to Referee 1 General comments The drought treatment in 2008 delayed the recovery of the redox potential during the first year of flooding in 2009. For example, methane production in the flooded plots reached the level of the control plots not before July/August 2009 (Estop-Aragones et al., unpublished data). In the growing season of 2010, no delay in methane production was observed bet...

The recovery of ethanol from aqueous solutions was studied by using supercritical carbon dioxide. At 333.2 K and 10.0 MPa, vapor /liquid equilibrium data of the mixture CO2 /ethanol /water were determined. No azeotrope was observed. Theoretical calculation of equilibrium stages was performed and compared with countercurrent column experiments. Separation of extract and solvent was optimized by ...

When crop plants are subjected to soil waterlogging, or an anaerobic condition, their root and shoot systems respond differently. A variety of morphological and anatomical alterations develop in the root system. Reduction of the root respiration rate has been reported in both flooding-tolerant and intolerant species. Besides alcoholic fermentation, several diverse fermentative bypasses take pla...

Climate change is one of the most serious problems facing the world today. The recent Intergovernmental Panel on Climate Change reports confirmed that climate change will have a significant impact on global surface temperature. The projections of IPCC are that the rise of the mean temperature will be as high as 6.4oC by 2100, while the concentration of CO2 will be 1.3 times higher than it was 2...