Computational Fluid Dynamics Modeling of Single-Phase Seawater Flow Inside a Reverse Osmosis Process Spiral Module

In this study, computational fluid dynamics modeling of the single-phase in the spiral wound membrane is presented for water desalination through the reverse osmosis (RO) process. single-phase Level Set method using the last version of CFD package, COMSOL Multiphysics 5.3 was employed to understand, qualitatively and quantitatively, the details of fluid flow and mass transfer. The 2D model proposed, considers hydrodynamic and convection-diffusion equations.Finally, the impacts of some effective operating variables such as feed concentration, feed velocity, trans-membrane pressure, water permeation flux, shear rate and osmotic pressure on the walls as well as outlet salt concentration.Results show that in the laminar single-phase flow, concentration polarization the whole spacer micro-channel including near the membrane wall and nodes, Flux reduction and Increased osmotic pressure and Reduced membrane efficiency.

کلیدواژه ها:

Reverse Osmosis ، Spiral Wound ، Membrane ، Single-Phase Modeling ، Concentration Polarization ، Permeation Flux ، Shear Rate.