The present work is an attempt for gaining some experimental data to investigate the effect of pipe diameter and roughness on drag reduction properties. Experiments were carried out in galvanized steel pipes whose nominal diameters were 12.7, 19.05, 31.75 and 50.8 mm (0.5, 0.75, 1.25 and 2 inches) respectively and in smooth polyvinyl chloride (PVC) pipe with 19.05 mm diameter.
The experimental study was primary designed to evaluate the effectiveness of various additive types as drag-reducer agents, both in the single and binary mixed forms. Since a comparison between more than one additives type, especially between water soluble polymers and suspended particles are rare in literature.
For the increasing importance of corrosion in all branches of recent life, a study on behavior of widely industrial metals (zinc, iron and copper) in deaerated hydrochloric acid is presented in this thesis. This work was developed to predict the corrosion rate and corrosion potentials of binary and ternary metal system to investigate and discuss the effect of temperature, concentration and area fraction of metals on the corrosion rate and corrosion potential. Metals used were iron, copper and zinc.
