Sensitivity of Grid Size to Particle Number

Load conc_test_control.txt
Change the grid size to 0.01 and output interval to 03

Load conc_test_setup.txt
Run simulation with 100 particles

Run simulation with 1000 particles

Run simulation with 10000 particles

Maximum concentration differences -

• 100 to 1000 particles: 25%
• 1000 to 10000 particles: 5%
• 1000 using 0.10 deg and 10,000 using 0.05 deg: 9%

Hypothetical example