Hour‐to‐Hour Height Variation
Rerun the single particle concentration simulation
But turn on the center‐of‐Mass trajectory output
Sensitivity of Maximum Concentration to Grid Size
Edit conc_part.bat (or .sh)
with different concentration grid resolutions: 0.10, 0.20, ...
Simulation with 100 particles
Simulation with 1000 particles
Simulation with 10000 particles
Maximum concentration differences with 0.10 grid -
- 100 to 1000 particles: 50%
- 1000 to 10000 particles: 36%
Maximum concentration differences with 0.20 grid -
- 100 to 1000 particles: 50%
- 1000 to 10000 particles: 15%
Sensitivity of Minimum Concentration to Particle Number
Edit conc_part.bat (or .sh)
for grid size 0.20 use gridplot and display plot.html
Simulation with 100 particles ... min = 5.3E-15
Simulation with 1000 particles ... min = 5.3E-16
Simulation with 10000 particles ... min = 5.3E-17
Hypothetical example
- A finer concentration grid requires more particles
- Or fewer particles could utilize a coarser grid
- Particle number versus grid size sensitivity can be evaluated using the maximum concentration
- Minimum concentrations are also affected because the lower limit is the mass of one particle divided by the grid cell size
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