Solve High-Frequency Acoustics Faster with the Radiosity Method in Actran

Traditional wave-based methods like FEM and BEM become computationally demanding at high frequencies, where fine meshes and long solve times make large-scale acoustic analysis impractical. The Actran radiosity solver takes a different approach: modeling acoustic energy transport instead of resolving individual waves, often reducing solve times from hours to minutes on standard workstations. 

What the White Paper Covers

• Explore how energy-based modeling predicts diffuse acoustic fields, including reflection, absorption, and transmission effects
• See how the radiosity approach compares with FEM in a validated partitioned room study solved in under five minutes versus several hours
• Discover three application case studies: a vehicle cabin study completed in under one minute, industrial facility simulations, and a 116-position urban noise map completed in roughly one hour on a laptop
• Understand where radiosity fits within a multi-frequency simulation strategy, and where its limitations matter

• Fast solve times: Complete industrial-scale models on a standard workstation in a fraction of the time
• No volumetric meshing: Only surface discretization and material properties are required, simplifying model setup significantly
• GPU-accelerated view factors: Precomputed on standard graphics hardware, with no specialized HPC accelerators needed
• Wide applicability: Used across vehicle, aerospace, industrial, architectural, and environmental acoustic studies