Human Respiratory Airflow

This benchmark addresses critical gaps in CFD modeling of human exhalation for airborne disease transmission studies. The benchmark describes a human respiratory flow problem, characterizing exhaled flows through comprehensive parameters including jet flow stages, injection times, directions, distances, velocities, Reynolds numbers, and dimensionless time parameters, establishing experimental baseline data for flow description and CFD modeling. Experimental analysis also revealed two distinct vortex flow regimes determined by dimensionless parameters rather than detailed velocity profiles.  

The benchmark tests whether simplified boundary conditions using bulk parameters can replace complex time-varying profiles without sacrificing accuracy, and whether advanced numerical methods can capture vortex dynamics of exhaled flow. This validation study offers potential for significant computational cost reduction while maintaining physical accuracy, providing essential tools for studying airborne transmission during normal respiratory activities.  

The benchmark test

• Benchmark test report
• Benchmark test measurements