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Related Experiment Video

Updated: Apr 21, 2026

Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing

Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing

Published on: February 13, 2016

Geometric issues in reverse osmosis: numerical simulation and experimentation.

G Srivathsan¹, Ephraim Sparrow¹, John Gorman¹

¹Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota, 55455, USA

Water Science and Technology : a Journal of the International Association on Water Pollution Research

|October 30, 2014

Summary

This summary is machine-generated.

Geometric imperfections in reverse osmosis (RO) systems significantly impact pressure drop. Accounting for these imperfections in simulations aligns results with experimental data, improving model accuracy.

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Published on: March 1, 2020

Area of Science:

Fluid dynamics
Membrane science
Computational modeling

Background:

Reverse osmosis (RO) systems are crucial for water desalination and purification.
Accurate modeling of fluid flow in RO systems is essential for optimizing performance.
Geometric imperfections in flow channels can affect system efficiency.

Purpose of the Study:

To quantify the impact of geometric imperfections in RO system flow channels.
To compare experimental data with numerical simulations under varying geometric conditions.
To validate the assumption of geometric periodicity in feed spacer simulations.

Main Methods:

Synergistic approach combining laboratory experiments and numerical simulations.
Experiments quantified fluid flow in RO systems with embedded feed spacers.
Numerical simulations were conducted for both ideal and actual geometric configurations.

Main Results:

Unaccounted geometric imperfections caused a 14-19% deviation in pressure drop predictions.
Simulations incorporating geometric imperfections showed excellent agreement with experimental results.
The assumption of velocity field periodicity was supported by simulation and experimental data.

Conclusions:

Geometric imperfections are a critical factor influencing RO system performance.
Accurate geometric representation in simulations is vital for reliable predictions.
This study reconciles discrepancies between experimental and simulation results in the literature.