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In this paper we study domain decomposition methods for solving some elliptic problem arising from flows in heterogeneous porous media. Due to the multiple scale nature of the elliptic coefficients arising from the heterogeneous formations, the construction of efficient domain decomposition methods...

This paper presents a novel 2-D phased array ultrasonic imaging system consisting of a cylindrical transducer array with 800 elements and its associated electronics, in a miniaturized package, with the capability of electronic beam scanning and beam focusing. The system can operate in harsh...

The expansion of the oil fields in the North Sea has been a driving force for technology development of remotely controlled hyperbaric welding of subsea pipelines, which has been used for tie-ins and repair of pipelines since the mid-1980s. SINTEF (research institute in Norway) has been involved in...

The present paper demonstrates how 2D, dynamic simulations of a flat bubble column are feasible, applying state-of-the-art dynamic turbulence models, when an appropriate turbulent dispersion term is applied in the conservation equation for the gas volume fraction. The k omega turbulence model...

We demonstrate a passive microfluidic system for simple and efficient metering, handling and control of parallel nanoliter samples on-chip.  The system consist of two chips; one for sample loading, splitting and metering (based on capillary forces only), and another for sample plug movement in...