https://www.selleckchem.com/pr....oducts/vardenafil.ht
We imaged the pore-scale distribution of air and water within packed columns of glass spheres of different textures using x-ray microcomputed tomography after primary drainage and after secondary imbibition. Postimbibition residual air saturation increases with roughness size. Clusters larger than a critical size of about 15 to 40 pores are distributed according to a power law, with exponents ranging from τ=2.29±0.04 to 3.00±0.13 and displaying a weak negative correlation with roughness size. The largest cluster constitutes 7 to 20%