Record Details

Multifaceted Convergence Study for Evaluating Gas Diffusion Parameters of Polymeric Membranes

Harvard Dataverse (Africa Rice Center, Bioversity International, CCAFS, CIAT, IFPRI, IRRI and WorldFish)

View Archive Info
 
 
Field Value
 
Title Multifaceted Convergence Study for Evaluating Gas Diffusion Parameters of Polymeric Membranes
 
Identifier https://doi.org/10.7910/DVN/6D1JKE
 
Creator Naveen Weerasekera
 
Publisher Harvard Dataverse
 
Description In this paper, gas transport properties of PTFE (polytetrafluorethylene) polymeric membranes are studied. We focused our work on three methods based on, Darcy’s pore flow model, Fick’s diffusion and numerical analysis. Effective diffusion coefficients obtained by Darcy’s and Fick’s laws are compared. In numerical analysis, simplified computational fluid dynamics model was created using virtual porous medium
concept. Virtual porous media is generated by adding a momentum sink term in the governing equations of fluid flow. Diffusion process described by Darcy’s method is performed using transfer of clean air through the membrane under induced
pressure gradients. Fick’s diffusion parameters are obtained based on trace compound (C3H8O) transport through the membrane under induced concentration gradients. Relatively high inertial permeability compared to viscous permeability
( 102) are recorded in Darcy’s analysis. Also, effective diffusion coefficient obtained by Fick’s law shows 10-2 decrement compared to the same obtained by Darcy’s pore flow model. From computational fluid dynamics (CFD) results, virtual pore flow model successfully demonstrated its soundness on analyzing membrane transport properties.
 
Subject Chemistry
Engineering
membrane transport
effective diffusion
Darcy's pore flow model
Fick's diffusion
virtual porous media
computational fluid dynamics
 
Contributor Weerasekera, Naveen D