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Several dispersion mechanisms are at play in clay rich shales. Most laboratory measurements show dispersion at low frequencies, and usually more dispersion from seismic to ultrasonic frequencies. Low frequency measurements on pure clay demonstrate that dispersion in clays may not rely on...

Geomechanical anisotropy of shale overburden gives largely different estimates of stress and pore pressure changes which again impact on overburden 4D seismic response. The combined use of lab (static elastic moduli, Skempton parameters and velocities vs stress) and geomechanical modelling...

Methods to accurately assess the toxicity of chemicals in plastics are needed. Importantly, there is a lack of studies successfully deconvoluting particle and leached chemical effects on organisms. A recent investigation by our group indicated elastomer chemicals are more potent than common...

An increase in the demand for renewable energy is driving hydropower development and its integration with variable renewable energy sources. When hydropower is produced flexibly from hydropower plants, it causes rapid and frequent artificial flow fluctuations in rivers, a phenomenon known as...

The increased integration of distributed energy resources (DERs) in the distribution network with intermitent generation profiles will likely make voltage regulation a difficult task. However, DERs bring both challenges and opportunities, as they can provide renewable forms of local energy and act...

Interface dynamics of two-phase flow, with relevance for leakage of oil retained by mechanical oil barriers, is studied by means of a 2D lattice-Boltzmann method combined with a phase-field model for interface capturing. A Multi-Relaxation-Time (MRT) model of the collision process is used to obtain...

Traditionally, it has often been assumed that the flow conditions in a moonpool are only moderately altered when an object is introduced therein. Moreover, the hydrodynamic forces acting on the object has typically been estimated by Morison’s equation for small volume structures, using the fluid...

Market analysts have foreseen the emergence of cloud brokers in the mediation of cloud services. But rather than focus on current kinds of intermediary role, it is more constructive to consider the kinds of brokerage capability that could be offered in the future, which go far beyond the integration...

This study is carried out to model a gravity-fed evaporator for CO₂ based heat-pump chillers. The gravity-fed evaporator loop consists of a separator, a downcomer, a heat exchanger, and a riser. The working principle is that the evaporation of fluid in the heat exchanger gives rise to a density...