Openfoam kullanarak yapılandırılmış dolgu yüzeyinin CO2 absorbsiyonu üzerindeki etkisinin incelenmesi

The scope of the present thesis is to effectively utilize the OpenFOAM (open source CFD software) to study influence of structured packing surface textures on absorption of CO2 and find possibility of developing improved surface texture(s). The work mainly focuses on the three aspects: implementing an effective approach in OpenFOAM for modeling reactive mass transfer of CO2, deriving the surface texture design parameters that can influence the overall mass transfer and suggest a possible new surface texture design. CFD modeling of structured packing is carried in three scales: small-, meso- and large scales. Small scale analysis is carried to study the influence of micro scale phenomenon on the performance of the packing. Meso-scale analysis is usually carried to study the dry and wet pressure drop using representative elementary units (REU). Large scale analysis is carried to study the liquid distribution over a full scale column by modeling the column as porous medium. This thesis focuses on small and meso scale. The novelty of the present thesis is in implementing the one fluid formulation for modeling the mass transfer across gas liquid interface along with developing user code required for effective post-processing. This thesis proposes a best practice of keeping "amplitude to base ratio of a texture <0.2" for designing the surface textures. A new texture was proposed and verified experimentally for its effectiveness in producing higher interfacial area. Also this thesis presents results of pressure drop analysis by considering detailed surface texture geometry at meso-scale for the first time.