The Van Deemter equation can be further expanded to:
Where: 
* H is plate height
* λ is particle shape (with regard to the packing)
* d is particle diameter
* γ, ω, and R are constants
* D is the diffusion coefficient of the mobile phase
* d is the capillary diameter
* d is the film thickness
* D is the diffusion coefficient of the stationary phase.
* u is the linear velocity