We are missing a deep understanding of the coupling of multiphase flows and fluid-solid reactions, including rock dissolution and mineral precipitation. To achieve this objective, we designed a geo-material microfluidic cell using limestone from SACROC unit (Texas, US) as substrate. For the single flow experiment, supercritical (sc) CO$_2$ dissolved in brine was flowed through a controlled...
Reservoir properties of sandstones are controlled by precipitation and dissolution reactions at the pore walls. Both, the formation and dissolution of cement minerals are responsible for the complex pattern formation of porosity and permeability in reservoir rocks.
At the scale of drilled core sections (plugs), experimental and analytical approaches utilize positron emission tomography (PET)...
Digital core analysis has become an additional tool to physical experimental analysis for multiphase flow experiments. Digital core analysis is fast and can give more insight into the details inside a rock. In digital core analysis different imaging technologies with different resolutions are employed to identify pores and textures scaled from millimeters to nanometers in a heterogeneous rock,...
The redox flow battery is a promising energy storage technology for mitigating the uncertainty of renewable energy sources and bringing us a step closer to integrating them with the current energy grid systems. However, they are a relatively new technology that are unproven and currently too expensive. Optimizing flow batteries is an active area of research since it can potentially reduce...
The thermal interactions of fluid-solid regions occurring at pore-level during non-isothermal flow in porous media is usually characterized by the thermal dispersion coefficient at the macroscale. Thermal dispersion coefficient represents the combined effect of thermal diffusion and mechanical convection on the dynamics of heat transport in a porous medium. Thermal diffusion is the transport...
Porous electrodes with high specific surface area have been efficiently applied to design miniaturized electro-devices such as bio-batteries, bio-captors, etc. Such electrodes may provide much higher electrical current than classical flat electrodes of the same macroscopic size [1]. In a previous work [4], a multi-scale model of diffusion and electrochemical reaction in porous electrodes has...
Numerical instabilities at low capillary numbers is a problem that has been reported for different types of pore network models [2], and first to address the issue was Koplik and Lasseter [4]. As most practical applications are in this regime, such as water flow in fuel cell gas diffusion layers and flow of carbon dioxide some distance away from the injection well in carbon dioxide...
Pore-network modeling provides a platform to study the upscaling problems in two-phase flow in porous media by representing the pore structure with a network of links and linking the pore-scale physics to the larger network. However, the bottleneck in this approach is the necessity to solve the pore-pressure field at each time step which makes it more and more computationally expensive with...
Reactive transport in sandstones is of importance for applications including acid stimulation methods, contaminant remediation and carbon dioxide sequestration. Natural sandstones consist of various minerals. These different minerals can lead to large discrepancy in predicting petrophysical properties. Simulation results of multi-mineral and single mineral reactions are compared to illustrate...
We quantify interactions between resident and infiltrating water coupled with tracer transport during water-air, drainage-imbibition cycles. Using a 2D Lattice Boltzmann method (LBM), we investigate immiscible-miscible and tracer transport processes in an heterogeneous pore structure with various boundary conditions. The simulations clearly show three types of interactions between resident and...
