Current automotive exhaust gas aftertreatment systems consist of catalytic converters for abatement of gaseous pollutants such as CO, hydrocarbons (HC) and nitrogen oxides (NOx), and a filter trapping the particulate matter (PM). So far only cars with Diesel engines have been equipped with the filter (DPF) but the recently introduced EURO 6c particulate number limits enforce the use of...
Multiphase fluid flow has been intensively studied within relatively homogeneous pore structures such as bead packs and sandstones. It has been shown that pore network characteristics such as the network topology, the pore size distribution and surface morphology can strongly affect the displacement and trapping of fluids by varying local capillary pressure and thereby changing the preferable...
A theoretical study of forced convection in a parallel-plate microchannel partially filled with a porous medium is performed based on the local thermal non-equilibrium (LTNE) model. The two walls sandwiching the channel are exposed to thermal asymmetry boundary conditions, and the flexible porous medium is not connected to the walls. Effects of flow inertia in porous medium, velocity jump at...
In polymer electrolyte fuel cells (PEFC) the transport of liquid water is highly relevant for efficient operation of the stack. For this reason the liquid water transport in gas diffusion layers (GDL) and in channels is addressed by many researchers. The GDL/channel interface is characterized by Yu et al. [1,2], its coupling to channel simulations is shown by Andersson et al. [3]. In that work...
Wind action at the soil surface potentially controls the movement of gases (including greenhouse gases and water vapor) in the near-surface soil as well as exchange of these gases with the atmosphere. Part of the mechanism behind this gas movement has recently been shown to be wind-induced horizontal pore gas movement within the near-surface soil.
The objective of this study was to investigate...
For the layered system, cross-flow is one of the mechanisms for recovery enhancement during an IOR/EOR process. Thus, the results from this paper are very important to overcome the current challenges in capturing the importance of cross-flow influence as well as mitigating the effect of geological uncertainties on current and future IOR/EOR projects.
This manuscript presents the results of an...
After nearly 65 years of research on Taylor dispersion and literally thousands of papers on the subject, it is reasonable to ask if there is anything interesting left to be said about it. However, there still remains one outstanding problem in Taylor dispersion theory that has resisted a very satisfactory theoretical description. This is the problem of the relaxation of the initial condition...
