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Updated: Jul 7, 2026

Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
Published on: February 17, 2019
Shape transformations of a compartmentalized fluid surface.
1Department of Mechanical and Systems Engineering, Ibaraki National College of Technology, Nakane 866 Hitachinaka, Ibaraki 312-8508, Japan. koibuchi@mech.ibaraki-ct.ac.jp
This study explores a surface model on compartmentalized spheres, revealing diverse phases like spherical, tubular, and planar. These phases are primarily separated by first-order transitions, driven by cytoskeletal structures and vertex diffusion.
Area of Science:
- Computational physics
- Materials science
- Biophysics
Background:
- Understanding the behavior of compartmentalized surfaces is crucial in various scientific fields.
- Previous models may not fully capture the complex phase transitions observed in such systems.
Purpose of the Study:
- To investigate a surface model on compartmentalized spheres using advanced simulation techniques.
- To identify and characterize the different phases exhibited by the model.
- To elucidate the mechanisms driving phase transitions and mechanical properties.
Main Methods:
- Utilized the Monte Carlo simulation technique.
- Employed dynamical triangulations for surface modeling.
- Analyzed phase transitions and mechanical properties based on elastic skeletons and vertex diffusion.
Main Results:
- Identified multiple distinct phases: spherical, tubular, planar, wormlike (planar, long, short), and collapsed.
- Demonstrated that most phase transitions are first-order.
- Confirmed that elastic skeletons (compartment boundaries) dictate mechanical strength.
- Showed that free vertex diffusion within compartments is essential.
Conclusions:
- The cytoskeletal structure and lateral vertex diffusion are the fundamental origins of the observed phase diversity.
- The model provides a framework for understanding the complex physical behavior of compartmentalized surfaces.
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