Discrepancies between the true experimental and the modelled geometries, including an average diameter deviation of approximately 7.4% across various measurement points, introduce additional uncertainties. The numerical model geometry is only an approximate replica of the true geometry however it consistently uses a capillary diameter of 0.3 mm at its narrowest point, whereas the actual experimental geometry shows the capillary diameter increasing before and after this point. These differences and simplifications could potentially impact the results of the study and interpretations. Additionally, factors such as interactions between chemical species within the capillary, which the current LB model does not consider, may also influence diffusion behavior.