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Related Concept Videos

Membrane Fluidity01:23

Membrane Fluidity

Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.

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Related Experiment Video

Updated: May 9, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
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Mitigating polarization in flat-sheet membrane distillation through CFD-driven spacer design.

Sara Karimi1, Matteo Morciano2,3, Carlos Plana Turmo4

  • 1Department of Energy, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy.

Scientific Reports
|May 7, 2026
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Summary

Optimized spacer designs in membrane distillation (MD) modules improve water desalination efficiency. Novel geometries reduce temperature polarization, enhancing heat and mass transfer for sustainable water production.

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Last Updated: May 9, 2026

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Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

Area of Science:

  • Membrane technology
  • Sustainable energy
  • Water treatment

Background:

  • Membrane distillation (MD) offers sustainable water desalination using low-grade heat.
  • Optimizing fluid dynamics in MD modules is crucial for performance.
  • Flow maldistribution and inefficient heat/mass transfer limit current MD module designs.

Purpose of the Study:

  • To numerically investigate and optimize spacer geometries in flat-sheet direct contact membrane distillation (DCMD) modules.
  • To enhance flow uniformity, reduce temperature and concentration polarization, and improve thermal efficiency.
  • To identify novel spacer designs for improved desalination performance and reduced energy consumption.

Main Methods:

  • Utilized a validated computational fluid dynamics (CFD) approach to simulate DCMD hydrodynamics and thermal behavior.
  • Validated the CFD model against published experimental data for accuracy.
  • Conducted an extensive parametric study on various spacer designs (shape, orientation, spacing).

Main Results:

  • Novel twisted and elliptical spacer geometries were investigated.
  • These optimized spacers achieved up to a 5.4% reduction in temperature polarization coefficient compared to literature benchmarks.
  • Demonstrated measurable enhancement in heat and mass transfer efficiency.

Conclusions:

  • Innovative spacer geometries significantly improve the performance of membrane distillation modules.
  • Optimized spacers offer a pathway to enhanced desalination efficiency and reduced energy usage.
  • Findings provide a roadmap for experimental implementation of advanced spacers in MD technology.