Unconventional hydrocarbon resources from low-permeability formation, i.e., tight sands and shales, are currently received great attention because of their potential to supply the entire world with sufficient energy for the decades to come. In the past few years, as a result of industry-wide R&D effort, progresses are being made towards commercial development of gas and oil from such unconventi...

abstract rockfill dams are usually used for affecting the flood and reducing the peak discharge. the materials used in these dams will usually make the flow turbulent, therefore darcy's law can not be used for this kind of dams and the equations based on the non-darcy flow must be applied. non-darcy flow equations are showed in two general ways including: and .one of the main parameters for flo...

In this paper, we propose a new numerical scheme for the coupled Stokes-Darcy model with Beavers-Joseph-Saffman interface condition. We use weak Galerkin method to discretize Stokes equation and mixed finite element Darcy equation. A discrete inf-sup condition is proved optimal error estimates are also derived. Numerical experiments validate theoretical analysis.

Darcy Ribeiro, antropólogo e político brasileiro, foi um homem com muitos atributos intelectuais assumiu posições importantes na política nacional. Publicou seis volumes de estudos antropológicos, mais mil páginas, sobre a formação do povo brasileiro no âmbito das configurações histórico-culturais Américas nações mundiais. Este artigo passeia pelos registros etnográficos dos primeiros anos vida...

Operation principles of water supply systems are considered and the mathematical expressions for the system major components such as pipes, reservoirs and pumps are represented. Behaviour of thesystem is investigated by slow movement of fluid flow around steady-state operating point. Head losses changing nonlinearly with water flowrates in pipes are represented by the Darcy-Weisbach and the Haz...