In this study, countercurrent gas-liquid flow simulations using computational fluid dynamics (CFD) were conducted for random packings of Raschig rings. The random packing structure was constructed using gravity simulation, and the meshing quality was improved using a volume expansion-recovery method. In this study, the contacting issue between the gas and liquid phases was investigated using the volume of fluid model. Also CFD gas–liquid interface area of the small-scale absorbers is validated by the experimental data. The effect of rasching ring distribution in the packed column visualized by cross section plane contour of the gas velocity. The gas velocity is limited at 0.011 m/s in most regions. A high gas velocity can be observed in the regions with the absence of rasching rings. The maximum velocity reaches 0.1 m/s, and these regions are mostly located in the near-wall region for all four cases .The liquid holdup estimated from the simulation and compared with the available correlation ,and the results reveal that the estimated CFD liquid holdup h_L is in good agreement with existing correlations experimental data.