determining e0 from relative permeability physics 101

The purpose of this study is to measure effective relative permeabilities for well-defined multi-layered soils at the laboratory scale. Studies that derive effective multiphase parameters are few, and approximations are required to treat the non-linear multiphase flow equations. Such problems can be treated by introducing the concept of effective parameters that incorporate the effects of soil layering or other heterogeneities into a large-scale flow description. Predictions of the impact of remediation or the extent of contamination resulting from spills of gasoline, solvents and other petroleum products, must often be made in complex geological environments. Laboratory-scale measurements of effective relative permeability for layered sandsĮnergy Technology Data Exchange (ETDEWEB) Absolute and relative permeability functions in the two directions of interest are presented and new correlations for in-plane relative permeability of water and air are established. Saturation is measured using an ex situ gravimetric method. In the present work, air and water relative permeabilities are experimentally determined as functions of saturation for typical GDL materials such as Toray-060, -090, -120 carbon paper and E-Tek carbon cloth materials in their plain, untreated forms.

Modeling of liquid water transport through the GDL relies on knowledge of relative permeability functions in the in-plane and through-plane directions. Gas diffusion layer (GDL) in PEM fuel cells plays a pivotal role in water management. Measurement of relative permeability of fuel cell diffusion media

Determining e0 from relative permeability physics 101