A mathematical model to calculate the volume specific three-phase boundary length in the porous composite electrodes of solid-oxide fuel cell s presented. The model is exclusively based on geometrical considerations accounting for porosity, particle diameter, particle size distribution, nd solids phase distribution. Results are presented for uniform particle size distribution as well as for non...

The alluvial flood plains of lowland Britain contain thick sequences of fine-grained sediment that result from the deposition of suspended sediment during flood events. These environments constitute important storage zones for a wide range of sediment-associated nutrients and con­ taminants and many of the geochemical properties of the deposited sediment are strongly related to particle size. R...

This article addresses the design of a self-compacting gypsum-based lightweight composite (SGLC). A β-hemihydrate is used as binder and lightweight aggregate (LWA, 0-2 mm in different size ranges) is used as aggregate into this composite. The mix of the new composite is designed based on the particle size distribution grading theory applying the modified Andreasen and Andersen (A&A) grading lin...

The current special issue topic ‘‘modeling and simulation in composite materials’’ is intended to capture the recent advancements in the area of modeling and simulation in composite materials. The articles that appear under this topic describe theoretical models, molecular mechanics methods, finite-element methods, and multiscale methods for mechanical and thermal properties of composite materi...

The microstructure and tensile properties of the thixoforged in situ Mg2Sip/AM60B composite were characterized in comparison with the as-cast composite and thixoforged AM60B. The results indicate that the morphology of α-Mg phases, the distribution and amount of β phases and the distribution and morphology of Mg2Si particles in thixoforged composite are completely different from those in as-cas...

The effective action for the local composite operator Φ2(x) in the scalar quantum field theory with λΦ4 interaction is obtained in the expansion in two-particle-point-irreducible (2PPI) diagrams up to fiveloops. The effective potential and 2-point Green’s functions for elementary and composite fields are derived. The ground state energy as well as oneand two-particle excitations are calculated ...

An algebraic formalism for description of quantum states of charged particle with spin moving in two–dimensional space under influence of singular magnetic field is developed in terms of graded algebras. The fundamental assumption is that the particle is transformed into a composite system which consists quasiparticles, quasiholes and magnetic fluxes. Such system is endowed with generalized sta...