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Chapter
Two Phase Flow through Packed Bed Static and Dynamic Accessibilities of the Packing
We present a simple description of a gas-liquid flow through a packed bed under trickle flow conditions. A careful examination of the physics of the phenomena leads us to model the flow as a directed percolati...
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Chapter and Conference Paper
Competition between two kinds of entities in a Diffusion—Limited Aggregration process
An extra degree of freedom (the “spin”) is added in the well-known Diffusion-Limited Aggregation growth model. A physically relevant coupling energy between aggregating spins in presence of an external magneti...
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Chapter
Effect of Fluctuations on the Thermal Conductivity of High-TC Superconductors
The superconductivity fluctuation contribution kfl to the thermal conductivity of Bi2Sr1.8Ca1.2Cu2O8+y and DyBa2Cu2O7-x polycrystals is extracted from precise experimental data. A crossover from 2D to 3D behavior...
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Chapter
Electric Field Effects in High-T c Superconductors
The concentration of mobile carriers (electrons and holes) governs the electron transport of any substance. In semiconductors essential electric field effects are prevalent. Only little influence of the electr...
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Chapter
Fluctuation Phenomena in Superconductors
During the first half of this century after the prominent discovery done by Kamerlingh-Onnes, the problem of fluctuations, smearing the superconducting transition, had not even been taken into account: in bulk...
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Chapter
Influence of Information Flow in the Formation of Economic Cycles