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An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

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Published on: December 4, 2017

Drag forces on inclusions in classical fields with dissipative dynamics.

V Démery¹, D S Dean

¹IRSAMC, Université de Toulouse UPS and CNRS, France.

The European Physical Journal. E, Soft Matter

|August 31, 2010

Summary

This summary is machine-generated.

We found that drag forces on moving objects in soft matter systems are nonlinear and depend on field dynamics. This work explains drag in Ising systems and predicts forces on membrane proteins.

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Area of Science:

Soft condensed matter physics
Theoretical physics

Background:

Dynamical free field theories are widely used in soft condensed matter.
Understanding forces on inclusions is crucial for material properties.

Purpose of the Study:

To investigate the drag force on uniformly moving inclusions.
To analyze the relationship between drag force, inclusion velocity, and field dynamics.

Main Methods:

Linear interaction model between inclusions and dynamical free field theories.
Mathematical analysis of drag forces.

Main Results:

Drag forces are nonlinear functions of inclusion velocity.
Drag forces are highly dependent on the underlying field dynamics.
The study provides a framework applicable to Ising systems.

Conclusions:

The developed theory explains existing drag force phenomena.
Predicts drag forces on proteins in membranes due to membrane fluctuations (composition, phase, height).
Highlights the importance of field dynamics in determining drag forces.