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Elliptic random-walk equation for suspension and tracer transport in porous media

Shapiro, A.A.; Bedrikovetsky, P.G. - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 24, pp. 5963-5978

transport equation. The new equation contains the time and the mixed dispersion terms expressing the dispersion of the particle … much more particles than in the solution of the classical parabolic (advection-dispersion) equation. This is in agreement …

Persistent link: https://www.econbiz.de/10011062138

Social distancing, gathering, search games : mobile agents on simple networks

Alpern, Steve; Zeng, Li - In: Dynamic games and applications : DGA 12 (2022) 1, pp. 288-311

Persistent link: https://www.econbiz.de/10013198680

Utility Duality under Additional Information : Conditional Measures versus FiltrationEnlargements

Ankirchner, Stefan - Sonderforschungsbereich Ökonomisches Risiko <Berlin> - 2005

The utility maximisation problem is considered for investors with anticipative additional information. We distinguish between models with conditional measures and models with enlarged filtrations. The dual functions of the maximal expected utility are determined with the help of f-divergences....

Persistent link: https://www.econbiz.de/10005862000

Unambiguous Events and Dynamic Choquet Preferences

Dominiak, Adam; Lefort, Jean-Philippe - Alfred-Weber-Institut für Sozial- und … - 2009

Choquet expected utility preferences.A decision maker is faced with an information structure represented bya filtration. We … show that the decision maker’s preferences respect dynamicconsistency on a fixed filtration if and only if the last stage … certainty equivalence consistency and constrained dynamicconsistency to filtration measurable acts, it is shown that the …

Persistent link: https://www.econbiz.de/10009249015

Numerical study of transient heat transfer in semitransparent porous medium

Ben Kheder, C.; Cherif, B.; Sifaoui, M.S. - In: Renewable Energy 27 (2002) 4, pp. 543-560

Transient solutions were obtained for heat transfer through a semitransparent porous medium placed in a flow passage and submitted to incident radiation. The one-dimensional physical model takes into account, conduction, convection and radiation simultaneously. The porous medium is assumed to be...

Persistent link: https://www.econbiz.de/10010807180

Bi-layered and inclined porous collector: Optimum heat and mass transfer

Hadidi, N.; Ould-Amer, Y.; Bennacer, R. - In: Energy 51 (2013) C, pp. 422-430

This paper presents the results of a numerical study of double-diffusive convection in an inclined rectangular collector filled with two parallel porous layers. Each porous layer is considered homogeneous, isotropic and saturated with the same fluid. The vertical walls of porous cavity are...

Persistent link: https://www.econbiz.de/10010808341

Capillary rise in porous media

Lago, Marcelo; Araujo, Mariela - In: Physica A: Statistical Mechanics and its Applications 289 (2001) 1, pp. 1-17

Capillary rise experiments were performed in columns filled with glass beads and Berea sandstones, using visual methods to register the advance of the water front. For the glass-bead-filled columns, early time data is well fitted by the Washburn equation. However in the experiments, the...

Persistent link: https://www.econbiz.de/10010872078

Asymmetrical diffusion across a porous medium-homogeneous fluid interface

Alvarez-Ramirez, J.; Dagdug, L.; Inzunza, L.; Rodriguez, E. - In: Physica A: Statistical Mechanics and its Applications 407 (2014) C, pp. 24-32

Interfaces formed by a homogeneous fluid and a porous media are commonly found in nature and applications. This work uses Brownian motion simulations for exploring the effects of the interface in the diffusion transport of passive particles. The results revealed that the diffusion transport is...

Persistent link: https://www.econbiz.de/10010872269

Exergy transfer in a porous rectangular channel

Kurtbaş, İrfan; Celik, Nevin; Dinçer, İbrahim - In: Energy 35 (2010) 1, pp. 451-460

Present paper is performed to investigate the heat and exergy transfer characteristics of forced convection flow through a horizontal rectangular channel where open-cell metal foams of different pore densities such as 10, 20 and 30PPI (per pore inches) were situated. All of the bounding walls of...

Persistent link: https://www.econbiz.de/10011053589

Renormalization approach for the simulation of two-phase flow in porous media

Rodrı́guez, Adolfo A; Araujo, Mariela - In: Physica A: Statistical Mechanics and its Applications 298 (2001) 3, pp. 315-329

A new method for simulating two-phase flow in porous media using hierarchical lattices is presented. These type of lattices allowed us to perform simulations of very large systems at a very low computational cost. It is shown how flow properties agree with those found using conventional...

Persistent link: https://www.econbiz.de/10011063095