We have developed a new numerical method for modeling tracer and radionuclide transport through heterogeneous fractured rocks in a non-isothermal multiphase system. The model formulation incorporates a full hydrodynamic dispersion tensor, based on three-dimensional velocity ®elds with a regular or irregular grid in a heterogeneous geological medium. Two di€erent weighting schemes are proposed f...

■ Abstract We review selected geological processes to which numerical modeling has been applied, with the aim of describing some of the general approaches and applications of the modeling. All of these examples involve multiphase fluid flow, in some cases coupled with heat transport and phase changes. First, we describe modeling approaches to a human-made geological system—a potential undergrou...

A numerical method as well as a theoretical study of non-Darcy fluid flow through porous and fractured reservoirs is described. The non-Darcy behavior is handled in a three-dimensional, multiphase flow reservoir simulator, while the model formulation incorporates the Forchheimer equation for describing single-phase or multiphase non-Darcy flow and displacement. The non-Darcy flow through a frac...

Lappeenranta University of Technology Acta Universitatis Lappeenrantaensis 570 Samuli Kallio Modeling and Parameter Estimation of Double-Star Permanent Magnet Synchronous Machines Lappeenranta 2014 68 p. ISBN 978-952-265-563-9 ISBN 978-952-265-564-6 (PDF) ISSN-L 1456-4491, ISSN 1456-4491 The power rating of wind turbines is constantly increasing; however, keeping the voltage rating at the low-v...

In the last 3 years there has been a huge increase in the use of pore-scale modeling to study multiphase flow and transport in porous media. Starting from single pore models of fluid arrangements, computations of relative permeability, interfacial area, dissolution rate and many other physical properties have been made. Combined with a realistic description of the pore space, predictive modelin...

More and more detailed simulation codes are developed promoted by the growing capability of high performance computers and the increasing knowledge about the underlying processes. This includes multiphase and multiphysics simulations as well as the coupling of multidisciplinary models. This paper introduces the framework FD4 (Four-Dimensional Distributed Dynamic Data structures), which enables ...

Research has shown that many communications protocols exhibit multiple phases of behavior, performing a distinct function in each phase. A systematic method has been proposed by Chow, Gouda, and Lam for building multiphase protocols. By connecting several simpler protocols modeling the specific phases in a disciplined way, the newly constructed multiphase protocol enjoys the same correctness pr...

In recent years the Smoothed Particle Hydrodynamics (SPH) approach gained popularity in modeling multiphase and free-surface flows. In many situations, due to certain reasons, interface and free-surface fragmentation occurs. As a result single SPH particle solids/droplets of one phase can appear and travel through other phases. In this paper we investigate this issue focusing on a movement of s...

Phase-based quality analysis and prediction has been widely addressed by employing different calibration modeling techniques in multiphase batch processes. In this paper, a rational analysis scheme is presented to evaluate and understand the effects of the inter-phase correlation on, such as the extraction of the latent information, model structure and quality prediction. This is performed by c...

The identification of kinetic models for multiphase reaction systems is complex due to the simultaneous effect of chemical reactions and mass transfers. The extentbased incremental approach simplifies the modeling task by transforming the reaction system into variant states called vessel extents, one for each rate process. This transformation is carried out from the measured numbers of moles (o...