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Large-scale room acoustics

Simulating large-scale room acoustics (105M DoF) in minutes

 

Acoustic waves

The challenge

Simulating high-frequency acoustics in large domains (like rooms or vehicle cabins) requires extremely fine meshes to resolve short wavelengths.

This results in massive model sizes (100M+ Degrees of Freedom). Traditional workstations crash due to RAM limitations or are forced to use slow, unstable iterative solvers that take days to converge.

Approach with Quanscient Allsolve

This study demonstrated Quanscient Allsolve’s ability to provision 8 TB of RAM and 500 Cores on demand.

This massive hardware access allowed the team to use a robust Direct Solver (in the frequency domain) for a 105 Million DoF model—a numerical method that is mathematically superior but usually impossible due to memory constraints.

Key results

  • Speed: Solved a 105 Million DoF acoustic scattering model in just 458 seconds (7.6 minutes).
  • Hardware power: Leveraged 8 TB of RAM to maintain solver stability, a capacity virtually non-existent in on-premise clusters.
  • Iterative speed: Smaller models (7.8M DoF with PMLs) were solved in just 2.5 minutes, enabling real-time tuning of absorbing boundary conditions.
Pressure field showing the acoustic waves emanating from two loudspeakers interfering among themselves and scattered by the objects in the room.