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ProjectPhysX / FluidX3D

The fastest and most memory efficient lattice Boltzmann CFD software, running on all GPUs via OpenCL. Free for non-commercial use.
https://youtube.com/@ProjectPhysX
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Support for external compositing with high fidelity 3D models of vehicle and environment for enhanced visualizations #232

Closed lk251 closed 1 month ago

lk251 commented 1 month ago

Dr. Lehmann, This idea comes from the arts and not the sciences or engineering, so I don't expect it to be a priority.

I wonder if the simulation data (like velocity and vorticity fields) could be exported each frame for compositing with external renders in software like Blender, so that flow visualization may be integrated with photorealistic models and environments.

I would be interested in contributing to this effort. Thank you for your attention and your magnificent piece of software. Javier

ProjectPhysX commented 1 month ago

Hi @lk251,

volumetric data export for external analysis/rendering is already possible, in binary .vtk format, see here. The problem is that file size is gigantic, and a couple thousand frames will need many TB of hard disk space. Exporting so much data will also blow up the runtime by ~100x, as hard drive write speed becomes the new bottleneck. For large simulations, in-situ rendering is the only viable option.

Kind regards, Moritz