An Experimental Setup with Radial Injection for Investigation of Transport and Deposition of Suspended Particles in Porous Media

2017 ◽  
Vol 40 (6) ◽  
pp. 20160032
Author(s):  
Sadok Feia ◽  
Jean-Claude Dupla ◽  
Jean Canou ◽  
Siavash Ghabezloo ◽  
Jean Sulem ◽  
...  
Keyword(s):  
Porous Media ◽  
Suspended Particles ◽  
Experimental Setup ◽  
Radial Injection

Contribution of the transport of suspended particles to the internal erosion in soils. Particle migration in porous media

2007 ◽  
Vol 11 (4) ◽  
pp. 493-506
Author(s):  
Ahmed Benamar ◽  
Nasr-Dine Ahfir ◽  
Abdellah Alem ◽  
Huaqing Wang
Keyword(s):  
Porous Media ◽  
Suspended Particles ◽  
Particle Migration ◽  
Internal Erosion

Porous media grain size distribution and hydrodynamic forces effects on transport and deposition of suspended particles

2017 ◽  
Vol 53 ◽  
pp. 161-172 ◽  
Author(s):  
Nasre-Dine Ahfir ◽  
Ahmed Hammadi ◽  
Abdellah Alem ◽  
HuaQing Wang ◽  
Gilbert Le Bras ◽  
...  
Keyword(s):  
Grain Size ◽  
Porous Media ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Suspended Particles ◽  
Hydrodynamic Forces

Mass Transport Measurements in Porous Transport Layers of a PEM Fuel Cell

2011 ◽  
Author(s):  
Lalit M. Pant ◽  
Sushanta K. Mitra ◽  
Marc Secanell
Keyword(s):  
Porous Media ◽  
Mass Transport ◽  
Catalyst Layer ◽  
Friction Model ◽  
Experimental Setup ◽  
Convection Diffusion ◽  
Transport Measurements ◽  
Pure Diffusion ◽  
Diffusion Technique ◽  
Diffusion Mass

Porous transport layers are an integral part of polymer electrolyte fuel cells (PEMFC). In order to optimize the catalyst layer performance and reduce catalyst consumption, a thorough understanding of mass transport through porous media is necessary. Currently, there is a lack of experimental measurements of effective mass transport properties of porous transport layers. Further, mass transport theories in the literature, such as the binary friction model by Kerkhof [1], have not been extensively validated for porous media. In the present study, mass transport measurements have been performed on the porous media of a PEMFC, namely a GDL and an MPL. The experimental setup described by Pant et al. [2] has been used. The setup uses the diffusion bridge/counter-diffusion technique for the mass transport measurements. The experimental setup has the advantage that it can be used to perform studies for pure diffusion and convection-diffusion mass transport. The setup also facilitates measurement of permeability of porous media, which can then be used in convection-diffusion studies. Preliminary permeability measurements of GDL and MPL from the setup show good agreement with values available in literature. In preliminary experimentation, the conventional diffusivity correlations like Bruggeman equation have been found to overpredict the diffusivities.

Acoustically driven collection of suspended particles within porous media

Ultrasonics ◽  
1997 ◽  
Vol 35 (2) ◽  
pp. 131-139 ◽  
Author(s):  
Sanjay Gupta ◽  
Donald L. Feke
Keyword(s):  
Porous Media ◽  
Suspended Particles

Physical factors affecting the transport and deposition of particles in saturated porous media

2017 ◽  
Vol 17 (6) ◽  
pp. 1616-1625 ◽  
Author(s):  
Xianze Cui ◽  
Quansheng Liu ◽  
Chengyuan Zhang
Keyword(s):  
Porous Media ◽  
Deposition Rate ◽  
Rate Coefficient ◽  
Dispersion Coefficient ◽  
Deposition Process ◽  
Suspended Particles ◽  
Longitudinal Dispersion ◽  
Physical Factors ◽  
Longitudinal Dispersion Coefficient ◽  
Injection Modes

Abstract Saturated sand box experiments were conducted to explore the effect of various physical factors on the transport and deposition of suspended particles in porous media. Red quartz powder and natural quartz sand were employed in the study and acted as suspended particles and porous media, respectively. Particles were injected into the sand box in two modes, i.e., pulse injection and continuous injection. Tests were performed at various particle concentrations, flow velocities, deposition rate coefficient and longitudinal dispersion coefficient by both injection modes. The breakthrough curves were described with the analytical solution of a convection–dispersion equation, in which first-order deposition kinetics were taken into account. Different behavior of suspended-particle transport and deposition in porous media was observed under different injection modes and experimental conditions. The results show that effluent concentration was approximately linear with the initial particle concentration. The deposition rate coefficient depends strongly on particle size and flow velocity, and the transport and deposition process was very sensitive to it. Furthermore, the longitudinal dispersion coefficient increases with increasing flow rate, and particles are easier to transport through pores as the longitudinal dispersion coefficient increases. This study shows the importance of particle concentration, flow velocity, deposition rate coefficient and longitudinal dispersion coefficient in the transport and deposition process of suspended particles.

Design of an Experimental Setup to Study Mass Transport in Micro-Nano Capillaries and Porous Media

2010 ◽  
Author(s):  
Lalit M. Pant ◽  
Marc Secanell ◽  
Sushanta K. Mitra
Keyword(s):  
Mass Transfer ◽  
Porous Media ◽  
Fuel Cells ◽  
Mass Transport ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion ◽  
Experimental Setup ◽  
Convection Diffusion ◽  
Electrolyte Membrane ◽  
Pure Diffusion

Study of gas diffusion is critical in understanding the process of mass transfer in porous media, which is an integral part of polymer electrolyte membrane fuel cells (PEMFCs). An experimental method is presented to study the mass transfer processes in micro-nano capillaries, which is further extended to study the transport in the porous media of fuel cells. A diffusion bridge setup, similar to the one presented by Remick and Geankoplis [1] has been used. The experimental setup facilitates the study of binary and multicomponent mixture transport through micro-nano capillaries and porous media. The setup can perform studies for two cases viz., pure diffusion and convection-diffusion. Using pressure controls in both channels, the pressure gradient across the capillaries is varied to study the convection diffusion process in detail. The results obtained from the study will be used to review various models of mass transport available in literature.

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