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Related Experiment Video

Updated: Jan 17, 2026

Parametric Optimization Design Method for Friction Plates of Hydro-Viscous Clutches
10:58

Parametric Optimization Design Method for Friction Plates of Hydro-Viscous Clutches

Published on: July 22, 2025

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Inverse design of parameter-controlled disclination paths.

Yehonatan Tsubery1, Hillel Aharoni1

  • 1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 7610001, Israel.

Proceedings of the National Academy of Sciences of the United States of America
|September 18, 2025
PubMed
Summary
This summary is machine-generated.

We developed a method to predict and design nematic disclination lines in liquid crystals using patterned surfaces. This allows for tunable control over defect behavior in thin-film devices.

Keywords:
inverse problemliquid crystalssoft matter physicstopological defects

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Area of Science:

  • Physics
  • Materials Science
  • Soft Matter Physics

Background:

  • Topological defects like disclination lines are crucial in physical systems.
  • Nematic liquid crystals exhibit complex behaviors influenced by boundary conditions.

Purpose of the Study:

  • To investigate nematic disclination behavior in thin parallel-plate geometries.
  • To develop methods for predicting and designing disclination trajectories via surface patterns.

Main Methods:

  • Solving the forward problem: predicting disclination paths from surface patterns.
  • Solving the inverse problem: designing surface patterns for tunable disclination curves.
  • Analyzing parameter limitations and stability constraints.

Main Results:

  • An explicit calculation for constructing surface patterns was developed.
  • Tunable families of disclination curves were achieved by varying system parameters.
  • Limitations and stability of the system were analyzed.

Conclusions:

  • The study provides a framework for controlling topological defects in liquid crystals.
  • This research has implications for experimental and technological applications in materials science.