the produced liquid water in cathode catalyst layer (ccl) has significant effect on the operation of proton exchange membrane fuel cell (pemfc). to investigate this effect, the transport of oxygen in ccl in the presence of immiscible liquid water is studied applying a two-dimensional pore scale model. the ccl was reconstructed as an agglomerated system. to explore the wettability effects, diffe...

Atomic number (A) and energy ( √ s) scaling exponents of multiplicity and transverse energy in heavy ion collisions are analytically derived in the perturbative QCD + saturation model. The exponents depend on the small-x behaviour of gluon distribution functions at an x-dependent scale. The relation between initial state and final state saturation is also discussed. [email protected] keij...

We apply the absorptive boundary prescription to include saturation effects in CCFM evolution equation. We are in particular interested in saturation effects in exclusive processes which can be studied using Monte Carlo event generator CASCADE. We calculate cross section for three-jet production and distribution of charged hadrons.

Natural gas trapped in hydrate deposits is a potentially enormous source of energy which can principle be extracted from the underground reservoir structures. These reserves also catastrophically release very large quantities greenhouse gases to atmosphere. One key parameter well known strongly influence fluid distribution, saturation, and production rock wettability. However, effect wettabilit...

The Lorentz contraction of ultrarelativistic nuclei entails a spatial overlap and fusion (recom-bination, saturation) of partons belonging to different nucleons at the same impact parameter. In these lectures we present a consistent description of the fusion of partons in terms of nuclear attenuation of color dipole states of the photon and collective Weizsäcker-Williams (WW) gluon structure fu...

Nuclear Magnetic Resonance (NMR) T2 measurements can be used directly to estimate petrophysical properties of reservoir rocks such as porosity and irreducible water saturation. They are also sensitive to pore-size distribution enabling the estimation of permeability and potentially capillary pressure. Several methods have been proposed to derive synthetic drainage capillary pressure information...

[1] The influence of reduced dimensionality (two-dimensional (2-D) versus 3-D) on predictions of dense nonaqueous phase liquid (DNAPL) infiltration and entrapment in statistically homogeneous, nonuniform permeability fields was investigated using the University of Texas Chemical Compositional Simulator (UTCHEM), a 3-D numerical multiphase simulator. Hysteretic capillary pressure–saturation and ...

the simultaneous flow of oil and water in porous media is described by relative permeability curves, mainly derived from laboratory experiments. relative permeability is of paramount importance in predicting reservoir production performance and drive mechanisms and its value depends largely on the volume fraction of fluids present in the test samples. nowadays x-ray scanners are one of the most...

Orientation{selective neu-rons in monkeys and cats show contrast saturation and contrast{ invariant orientation tuning (Albrecht and Hamilton, 1982). Recently proposed models for orientation selectiv-ity predict contrast invariant orientation tuning but no contrast saturation at high strength of recurrent intracor-tical coupling, whereas at lower coupling strengths the contrast response saturat...