Major changes include:
- Improved accuracy of the Poisson solver by fixing a minor bug in wavenumber computation.
- Corrected index mismatches in channel flow configurations.
- Tested the code with the latest NVIDIA HPC SDK versions 25.11 and CUDA 13.x.
- Modified the phase-field formulation to Rk4 + skew-symmetric-splitting, enabling the use of a finer grid with a smaller step size (0.51 eps/dx) for thinner interfaces.
- Refactored and optimized the code structure for better readability and maintainability.