M.Sc.

A theoretical study was carried out to analyze the corrosion of iron pipe and iron rotating cylinder in aerated hydrochloric acid using mixed potential theory equations under turbulent flow of Reynolds number of 5000, 10000,20000, 40000, and 60000, temperature of 25 °C, 40 °C, and 60 °C, and pH 1,2, and 4. The theoretical investigation included: the effect of Reynolds number, temperature, pH, relative roughness (e/d), and heat flux on corrosion rate and corrosion potential.

      The aim of this research is to find general empirical equations for predicting drag coefficient and settling velocity (for polymeric system of Car boxy Methyl cellulose CMC and Hydroxyl Ethel cellulose HEC as non-Newtonian fluids and water as Newtonian fluid), and to compare these equations with the other equations in literatures to show the accuracy of the developed equations.Empirical equation was found to relate drag coefficient C and Reynolds number Rep for a wide range of Repd from 0.001 to 10000 and for spherical and irregular shaped particles for Newtonian and non-Newtonian flu

   The distillation column is one of the essential separation processes in modern chemical and petrochemical industries so simulation of dynamic and control of distillation column was conducted in this work. For the control system, the important controlled variables were chosen to be the distillate composition (X_D), and the side stream composition (X_S).