We consider a computational model for the evolution of methane hydrates in subsurface. Methane hydrates, an ice-like compound abundant in subsea sediments and unstable in standard conditions, are an environmental hazard and simultaneously an energy source. Our multiphysics model includes multiphase multicomponent mass conservation equations and several variants of energy balance equation with o...

Thermal conductivity (k-value or λ-factor) is the fundamental driver of subsea thermal insulation system dimensions. It follows that an accurate determination of this parameter is a prerequisite for proper thermal design. Poor k-value data inevitably lead to inadequate system designs, which in turn can limit economic viability. This paper provides an overview of the error sources inherent to a ...

Glued-Laminated Timber (GLULAM) is a widely-used building material, popular for its strength, durability, and sustainability. It created by bonding together layers of wood, making it common choice civil structures. In this study, Bi-directional Evolutionary Structural Optimization (BESO) proposed to improve the performance GLULAM By positioning steel bars within structure, objective increase st...

Due to the pipelay vessel motions during installation of a subsea pipeline, as-laid direction pipeline changes along nominally straight section route. In High Pressure Temperature (HPHT) presence rogue lateral Out Straightness (OoS) can adversely influence reliability buckle initiation at engineered buckling sites e.g. sleepers. This implies requirement study ensure unwanted buckles are not for...

Performing subsea intervention tasks is a challenge due to the complexities of the underwater domain. We propose to use a learning by demonstraition algorithm to intuitively teach an intervention autonomous underwater vehicle (IAUV) how to perform a given task. Taking as an input few operator demonstrations, the algorithm generalizes the task into a model and simultaneously controls the vehicle...

The aim of this paper is to present the design and construction process of the power supply needed for a remote data acquisition system. It is based on twelve AC to DC switching converters in a serial connection and a logic programmable controller (PLC). The energy is transmitted to the acquisition system, which is located several kilometers away, by means of a cable. The supply system has been...

We discuss mathematical and computational models of two applications important for global climate and energy recovery involving the evolution of methane gas in the subsurface. In particular, we develop advanced models of adsorption occuring in coalbed methane recovery processes, and discuss the underlying conservation laws with non-standard terms. Next we describe the phase transitions relevant...