HNanoSolver

This is a project used to learn Fluid Dynamics and GPU acceleration through Cuda.

• HNanoSolver, All in one node computing a quantity advection by a divergence free velocity field on the GPU.
• HNanoProjectNonDivergent, Compute a Divergence free velocity field on the GPU.
• HNanoAdvect, Advect any float fields on the GPU.
• HNanoAdvectVelocity, Advect any vector field on the GPU.
• HNanoViewer, Standalone app to visualize VDBs and kernels without having to relaunch Houdini.

Warning !

Very Early Development This repo is undergoing rewrite very often and might not compile from time to time. Feel free to check the Open Issues for more details.

How to Build :

Windows :

Make sure HFS is set in your PATH.

• git clone https://github.com/ZephirFXEC/HNanoSolver
• cd HNanoSolver && mkdir build && cd build
• cmake -G "Visual Studio 17 2022" -T v142 It will generate Visual Studio solutions files that you can use to Compile & Run.

Linux :

Tested on Ubuntu 24 using GCC 13.3 and CUDA 12.8

• git clone https://github.com/ZephirFXEC/HNanoSolver
• cd HNanoSolver
• mkdir build && cd build
• cmake -DCMAKE_CUDA_COMPILER:FILEPATH=/usr/local/cuda-12.8/bin/nvcc -DCMAKE_CUDA_FLAGS:STRING="-O2 -g -DNDEBUG -fPIC" ..

if any errors here, make sure to have $HFS set, and the right NVCC compiler

• make

if any errors related to AVX / Cuda compilation it's probably due to an incompatibility between GCC and NVCC

Reference

Papers

• Bridson, R., Muller-Fischer, M. (2007). FLUID SIMULATION SIGGRAPH 2007 Course notes. SIGGRAPH. this
• Gabriel D. Weymouth, Data-driven Multi-Grid solver for accelerated pressure projection, this
• Williams and Others, fVDB: A Deep-Learning Framework for Sparse, Large-Scale, and High-Performance Spatial Intelligence, this

Cite

@misc{Crema_2025,
    title = {HNanoSolver: GPU Accelerated Sparse Volumetric Fluid Solver},
    url = {https://github.com/ZephirFXEC/HNanoSolver},
    journal = {GitHub},
    author = {Crema, Enzo},
    year = {2025}
}