Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
Concentration polarization occurs in all membrane-based technologies and is a major factor in reducing the efficiency of desalination, concentration-based power generation, and other membrane-based technologies. Therefore, we considered that changing the surface geometry of the permeation membrane would change the flow and thus affect the concentration polarization. In this study, we simulated forward osmosis using the Lattice Boltzmann Method (LBM) to investigate the effect of the surface geometry of the permeation membrane on the amount of permeation. The results showed the following. The larger the protrusion, the more permeation volume compared to the flat membrane. The concentration is lower upstream and downstream the protruding membrane and higher on the protrusions than on the flat membrane. The concentration polarization layer on the protrusions is thinner than that on the flat membrane.
