Figure 8. Diameter increase in the middle

From

3D Modeling and Simulation of Airflow and Aerosol Deposition of 5 Years Child

Mohammed Almijalli, Ravish Javed, Abdulrahman Aldokhi, Fares Mohammed Alsuliman, Kareem Adnan Alharbi, Omar Altwijri

Journal of Biomedical Engineering and Technology. 2020, 8(1), 1-5 doi:10.12691/jbet-8-1-1