Aerosol Brownian Diffusion Drift Calculator
Nanoparticle aerosol physics: Calculate the Stokes-Einstein diffusion coefficient ($D$), root-mean-square displacement ($\bar{x}_{rms}$), mechanical mobility ($B$), and diffusional deposition flux.
Nanoparticle & Gas Environment
1 nm to 1 μm (1000 nm)
Enclosure / Boundary Layer Geometry
For wall deposition velocity v_dep = D / δ
Brownian Motion & Diffusion Output
Diffusion Coeff D:
--
m² / s (Stokes-Einstein)
1D RMS Displacement:
--
x_rms = √(2Dt)
3D Net RMS:
--
r_rms = √(6Dt)
Cunningham C_c:
--
slip factor
Wall Deposition:
--
v_dep (m/s)
Dimensionless Ratios
Schmidt Number Sc (ν / D):
--
Knudsen Number Kn (2λ / d_p):
--
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