VatsalSy/filamentsVE: 💧 Viscoelastic Filament Breakup Solver v2.1

✨ Major Highlights

• 🎯 Complete simulation framework for viscoelastic filament dynamics in both 2D axisymmetric and 3D configurations
• 🧬 New initialization system for stretched filament configurations
• 🌊 Advanced pinch-off simulation capabilities for viscoelastic liquid jets

🆕 Key Features

🔬 Physics Modeling

• 🌀 Implemented scalar viscoelastic stress formulation for filament dynamics
• ⚡ Added support for variable relaxation times across fluid domains
• 💪 Incorporated elastic moduli effects for realistic polymer behavior
• 🎚️ Configurable Ohnesorge and Deborah numbers for diverse experimental conditions

📊 Numerical Implementation

• 🔄 Enhanced log-conformation method for high Weissenberg number stability
• 📈 Improved stress tensor evolution tracking during filament stretching
• 🎯 Specialized mesh refinement for interface tracking during pinch-off events
• ⚖️ Optimized handling of axisymmetric boundary conditions

💻 Simulation Tools

• 🛠️ Added support for both initial stretching and relaxation phases
• 📸 Implemented enhanced visualization tools for stress and deformation fields
• 📊 New data extraction utilities for analyzing filament profiles
• 🔍 Real-time monitoring of kinetic energy and minimum radius

🚀 Improvements

📈 Performance

• ⚡ Optimized matrix operations for filament dynamics
• 🎯 Enhanced accuracy in interface tracking
• 💨 Improved convergence in high-strain regions

🛡️ Stability

• 🔒 Robust handling of thin filament regions
• ⚖️ Better management of surface tension effects
• 🎯 Improved accuracy in stress calculation near breakup points

🐛 Bug Fixes

• 🔧 Resolved energy conservation issues in thin filaments
• 🛠️ Fixed strain calculation in highly stretched regions
• 🚧 Corrected boundary condition implementation at symmetry axis

📊 Validation

• ✅ Verified against experimental data for filament thinning
• 🧪 Tested across multiple Ohnesorge and Deborah number ranges
• 📏 Validated breakup dynamics and droplet formation

📚 Documentation

• 📖 Comprehensive setup guide for filament breakup simulations
• 💡 Detailed parameter selection guidelines
• 🎓 Added tutorial for post-processing and visualization

🔜 Coming Soon

• 🔄 Conservative advection scheme for improved mass conservation
• 🌡️ Temperature-dependent viscoelastic properties
• 🖥️ Enhanced parallel processing capabilities

💫 Compatibility

• ✅ Compatible with both desktop and HPC environments
• 🤝 Seamless integration with existing Basilisk installations
• 📦 Easy-to-use parameter configuration