In this study an experimental work was performed to examine the effect of porous media on the heat transfer from a cylindrical heater in the case of steady-state forced convection. Porous media consisted of Spherical glasses of diameter 0.6 cm and air was used as the cooling fluid. The bulk temperature was approximated by the inlet temperature and Properties of the air were found at the film te...

Considering the numerous applications of the study of the flow due to leakage in a buried pipe in unsaturated porous media, finding a proper model to explain the influence of the effective factors is of great importance.There are various important factors involved in this type of flow such as: pipe leakage size and location, burial depth, the degree of the saturation of the surrounding porous m...

We have developed a multiscale self-consistent method to study the charge conductivity of porous system or metallic matrix alloyed by randomly distributed nonmetallic grains and vacancies incorporating Schrödinger’s equation Poisson’s equation. To account for random distribution clusters within alloy system, we used an uncorrelated white-noise Monte Carlo sampling generate numerous alloys stati...

Subsurface ow processes are inherently three-dimensional and heterogeneous over many scales. Taking this into account, for instance assuming random heterogeneity in 3-D space, puts heavy constraints on numerical models. An e cient numerical code has been developed for solving the porous media ow equations, appropriately generalized to account for 3-D, random-like heterogeneity. The code is base...

[1] An efficient method for uncertainty analysis of flow in random porous media is explored in this study, on the basis of combination of Karhunen-Loeve expansion and probabilistic collocation method (PCM). The random log transformed hydraulic conductivity field is represented by the Karhunen-Loeve expansion and the hydraulic head is expressed by the polynomial chaos expansion. Probabilistic co...

1359-835X/$ see front matter 2009 Elsevier Ltd. doi:10.1016/j.compositesa.2009.04.009 * Corresponding author. Tel.: +1 506 452 6128; fax E-mail address: [email protected] (A. Nabovati). Fluid flow analyses for porous media are of great importance in a wide range of industrial applications including, but not limited to, resin transfer moulding, filter analysis, transport of underground water and...

This paper presents numerical analysis of electroosmotic flows (EOF) in charged anisotropic porousmedia using the lattice Poisson-Boltzmannmethod (LPBM), which combines two sets of lattice evolution methods solving the nonlinear Poisson equation for electric potential distribution and the Navier-Stokes equations for fluid flow respectively. Consistent boundary condition implementations are prop...

resin transfer molding (rtm) is a composite manufacturing process. a preformed fiber is placed in a closed mold and a viscous resin is injected into the mold. in this paper, a model is developed to predict the flow pattern, extent of reaction and temperature change during filling and curing in a thin rectangular mold. a numerical simulation is presented to predict the free surface and its inter...

a pressure-based coupled heat and mass transfer model was used to simulate temperature and soil suction in a drying process within a clay soil column. closed form functions were used for all parameters needed in the governing equations. model predictions were compared with experimental data using the mean relative percentage deviation method. thermocouples and mini-gypsum blocks were used t...