Results 251 to 260 of about 6,956 (299)

Model coupling for multiphase flow in porous media

Advances in Water Resources, 2013
Numerical models for flow and transport in porous media are valid for a particular set of processes, scales, levels of simplification and abstraction, grids etc. The coupling of two or more specialised models is a method of increasing the overall range of validity while keeping the computational costs relatively low.
Rainer Helmig, Bernd Flemisch, Anozie Ebigbo   +2 more
exaly   +2 more sources

Fluid-Solid Coupling-Based Vibration Generation Mechanism of the Multiphase Vortex

Processes, 2023
Multiphase vortices are widely present in the metallurgical pouring processes, chemical material extraction, hydroelectric power plant energy conversion, and other engineering fields.
Gaoan Zheng, Lin Li, Qihan Li
exaly   +2 more sources

Singularities in multiphase diffusion couples

Scripta Materialia, 2008
Singularities are not normally expected in diffusion couple data; however, they can occur in certain multiphase concentration profiles and diffusion paths. The following work reviews the theoretical reason why singularities form and gives two different computer simulations that support the theoretical predictions.
J.E. Morral, Ximiao Pan, Ning Zhou, Henrik Larsson, Yunzhi Wang   +4 more
openaire   +1 more source

Multiphase Converter Based on Transformer Coupling

IEEE Transactions on Power Electronics, 2011
In this paper, a multiphase converter where the phases are coupled by transformers is proposed to implement a minimum energy-storage converter. Advantages and drawbacks of this topology are analyzed and validated by means of three prototypes. The two main advantages of the minimum energy-storage concept are that the converter can be operated at very ...
M. Carmen Gonzalez, Pedro Alou, Oscar Garcia, Jesus Ángel Oliver, Roberto Prieto, Jose Antonio Cobos, Horacio Visairo   +6 more
openaire   +1 more source

COUPLED ANALYSIS OF DAMAGE IN MULTIPHASE MEDIA

Journal of Multiscale Modelling, 2012
In this paper, the theoretical framework of a coupled thermo-hydro-mechanical damage model dedicated to non-isothermal unsaturated porous media is presented. The damage variable is a second-order tensor, and the model has been formulated in independent state variables. The approach combines thermodynamic and micromechanical theories. The behavior laws
MARZIYEH FATHALIKHANI, BEHROUZ GATMIRI
openaire   +1 more source

Multiphase Ternary Diffusion Couples

Journal of the American Ceramic Society, 1977
The study of diffusion couples whose reactants or products have multiphase structure gives useful insight into ceramic reactions. When a coarse‐scaled resolution is applied, multiphase regions may be treated similarly to 1‐phase regions with respect to diffusional behavior.
openaire   +1 more source

Avoiding Pitfalls in Multiphase Thermo-Hydrodynamic Coupling

Engineering Technology Conference on Energy, Parts A and B, 2002
Multiphase flow is prevalent in many industrial processes. Therefore, accurate and efficient modeling of multiphase flow is essential to the understanding of these processes as well as the development of technologies to handle and manage them. In the petroleum industry, the occurrence and consequence thereof associated with such hydrodynamic processes ...
Luis F. Ayala, Eltohami S. Eltohami, Michael A. Adewumi   +2 more
openaire   +1 more source

Dynamic local coupling for multiphase flow: A compromise between efficiency and stability

Journal of Computational Physics, 2022
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Hanyu Li, Mary F. Wheeler
openaire   +1 more source

Pressure effects in multiphase binary diffusion couples

Metallurgical Transactions A, 1985
A systematic study has been carried out of the effect of pressure upon growth kinetics of intermediate phases formed in diffusion couples in the binary systems Ni-Al, U-A1, and U-Cu. Even though applied pressures greater than 100 MPa and long times were investigated little or no pressure effect was observed, in disagreement with previous literature ...
Dilip Subramanyam, Michael R. Notis, Joseph I. Goldstein   +2 more
openaire   +1 more source

Computer simulations of NiCrAl multiphase diffusion couples

Acta Materialia, 1997
Abstract A model for simulating diffusion in multiphase dispersions is here applied to Ni Cr Al multiphase diffusion couples at 1200°C. All simulations are based on the assumption that the γ-phase is continuous throughout the whole diffusion couple with β and/or γ' as secondary phases.
A. Engstro¨m, J.E. Morral, J. A˚gren
openaire   +1 more source