On the Riemann solutions of the balance equations for steam and water flow in a porous medium

Conservation laws have been used to model a variety of physical phenomena and therefore the theory for this class of equations is well developed. However, in many problems, such as transport of hot fluids and gases undergoing mass transfer, balance laws are required to describe the flow. As an example, in this work we obtain the solutions for...

Capillary Pressure and Wettability Behavior of Coal - Water - Carbon dioxide System

Enhanced Coal Bed Methane (ECBM) recovery techniques, based on carbon dioxide injection, have been proposed for the recovery of larger fraction of methane in place. Laboratory studies and recent pilot field tests demonstrate that CO2 injection has the potential to enhance coal bed methane recovery through displacement desorption mechanism with...

A model for a viscous preflush prior to gelation in a porous medium

In this paper we propose and analyse a simplified mathematical model on the effect of a fully miscible preflush on gel-placement in an oil reservoir. The approach is based on a segregated flow model even if the two phases are fully miscible. For the rate of a constant injection rate condition, fully implicit solutions can be constructed....

The influence of relative permeability functions on the oil and water production

Airfoil characteristics of rotating wind turbine blades

Performance measurements of the kolibrie- and fact rotor tipvanes on the full-scale experimental wind turbine

The angles of the fact rotor tipvanes on the rods and on the blades

This report contains the data of the angles of the tipvanes of the FACT rotor. These tipvanes were used on the FACT rotor blades and rods. Two sets uf tipvanes were measured: a set having a Liebeck air-foil section and a set with a NACA airfoil section. The tipvanes with the Liebeck airfoil section were mounted on the rods only. The tipvanes...

The angles of the kolibrie rotor tipvanes on the rods and on the blades

Definition, transformation-formulae and measurements of tipvane angles

Carried out within the Dutch Development Program for Wind Energy (NOW-2); by order of the Management Office for Energy Research PEO; financed by the Ministry of Economie Affairs.

Aerodynamic characteristics of a curved plate airfoil section at Reynolds numbers 60000 and 100000 and angles of attack from -10 to +90 degrees