CoMPhy Lab blogs

Computational Multiphase Physics (CoMPhy)

Computational Multiphase Physics
(CoMPhy)

Welcome to the CoMPhy Lab’s documentation hub! We are based at the Physics of Fluids Department at the University of Twente, where we explore non-Newtonian free-surface flows and soft matter singularities.

About Us

See: About us

Published Notes and Documentation

Blog posts:

2025

Double Network Hydrogel:

2025-10-31 2025-Why-Double‑Network-Hydrogels-Dont-Shatter: Why double-network hydrogels combine stiffness and toughness without shattering - elastic screening mechanisms that prevent crack cascades by damping stress propagation between sacrificial bonds.

Scientist profiles & history:

2025-10-24 2025-Emmy-Noether-Symmetry-Conservation: Emmy Noether’s revolutionary contributions to mathematics and physics - from overcoming gender barriers in academia to discovering the profound connection between symmetry and conservation laws that now underpins all of modern physics.

Laser-droplet interactions:

2025-10-06 2025-Curvature-Inversion-in-Laser‑Struck-Droplets: Understanding how laser-induced pressure impulses control droplet sheet curvature in EUV lithography - from raised-cosine impulses to forward-bending sheets in tin microdroplets.

Computational tools & visualization:

2025-10-01 2025-visual-pdes: Interactive browser-based PDE simulator - exploring pattern formation, reaction-diffusion systems, and mathematical visualization through GPU-accelerated simulations. A “Desmos for PDEs” that runs in your browser.

Elastoinertial turbulence:

2025-02-24 2025-Arrowheads-in-elastoinertial-turbulence: Critical review of arrowhead structures in elastoinertial turbulence, examining their existence in 3D flows and experimental observations.

Drop impact dynamics:

2025-02-22 2025-JFM-viscous-drop-impact: Comprehensive study of viscosity’s role in drop impact forces, from raindrops to inkjet printing applications.

Capillary waves:

2025-01-11 2025-Features-of-capillary-waves-during-asymmetric-bubble-coalescence: Analysis of capillary wave dynamics during bubble coalescence, focusing on energy transfer and wave propagation mechanisms.

Code Documentation

2024

H-B formulation:

2024-12-31 2025-Herschel–Bulkley-formulation: Mathematical formulation of the Herschel-Bulkley model for non-Newtonian flows, with emphasis on yield stress fluids.

Lecture Notes:

Basilisk101

Basilisk101: Comprehensive course on computational fluid dynamics using the Basilisk C framework. Topics include:

  • Conservation laws and numerical solutions of Navier-Stokes equations
  • Transport equations and interface tracking methods
  • Non-Newtonian flows and viscoelasticity
  • Multi-phase flows and contact line dynamics
  • Hands-on coding assignments with practical implementations

Introduction to Soft Matter

Intro-Soft-Matter: Graduate-level course exploring soft condensed matter physics. Course structure includes:

  • Fundamental concepts: What makes materials “soft”?
  • Viscosity and momentum diffusion from kinetic theory
  • Soft matter instabilities and singularities
  • Rheology and viscoelastic behavior
  • Weekly lectures with self-assessed homework and student presentations

Individual Lecture Notes:

2025-11-05 4-Soft-Matter-Singularities: Lecture on finite-time singularities in soft matter, covering pinch-off, contact-line singularities, and scaling behavior across inertial, viscous, and viscoelastic regimes.

Talks:

2026

Seminar Presentations:

2026-01-07 Seminar-Coalescence-with-Surfactants: Seminar on asymmetric sessile-drop coalescence showing how insoluble surfactants can bias bridge growth, induce Marangoni-driven drift, and select merge-versus-non-merge outcomes.

2026-01-05 Seminar-Singularities: Seminar on hydrodynamic singularities in soft matter, connecting drop impact, bubble bursting, and retracting films through experiments, simulations, and theory.

Connect With Us

Contributing

We welcome contributions from researchers, students, and collaborators. Here’s how you can contribute:

  1. Issues: Found a problem or have a suggestion? Choose an option below:

  2. Pull Requests: Want to contribute directly?

    • Fork the repository
    • Make your changes (it can simply be correcting grammar or making a new post - simply write in plain text or markdown format and add it to the root folder).
    • Submit a pull request with a clear description of your changes

Visit our GitHub repository to get started.

Note: This documentation is maintained by the CoMPhy Lab team and is regularly updated with our latest research findings and computational methods.

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