Help with COMSOL

I am doing a study of transport of diluted species onto an imported 3D CAD file (picture at the end). Please help explain to me how to do the following steps using the COMSOL software.

1. I am given this following equation (below), how do I input it into COMSOL? All are constants except K so I assume I need to put K as a variable?

2. I need to perform a parametric sweep on the model for simulation. How do I do that?

Thank you very much for explaining.

Picture of the study:

since the drug is immediately taken up by the blood supply. The stratus corneum permeability, i.e. Pso, is given by an equation similar to Equation 5.83. (7.42) SC SC where esc represents the volume fraction of the lipid bilayers through which the drug diffuses, Dsc is the diffusivity of the drug in the lipid bilayer material, and K represents the equilibrium solubility of the drug in the stratus corneum. drug lx-0 since the drug is immediately taken up by the blood supply. The stratus corneum permeability, i.e. Pso, is given by an equation similar to Equation 5.83. (7.42) SC SC where esc represents the volume fraction of the lipid bilayers through which the drug diffuses, Dsc is the diffusivity of the drug in the lipid bilayer material, and K represents the equilibrium solubility of the drug in the stratus corneum. drug lx-0