Chemical - Engineering

           The experimental work was devoted to study the drag –reduction (DR) properties of various additive types, both in the single and binary mixed forms. Two polymer types, of high molecular weights 4 and 7 millions were used in the present investigation,namely, polyethylene oxide PEO as flexible synthetic polymer andAmylopectin as rigid polysaccharide from natural resources.Moreover, a certain type of natural Clay (Kaoline) and Aluminumsulfate (Alum) are included as suspended particles or in the colloidform.

The present work is an attempt for gaining some standard and technical information to analyze the problem of heat loss from pipelines carrying hot streams. The analysis covers the use of a single cylindrical insulation or composite structure of different insulating materials. Applying the quasiNewton’s method in STATISTICA program,the thermal conductivity equation function of factors affecting insulation efficiency

 This work aims to study the effect of  the relationship between the mass transfer coefficient and friction/shear velocity by the analysis of experimental results using Rotating Cylinder Electrode (RCE) to evaluate the limiting current density (LCD) under turbulent flow conditions at three different temperatures 40,50,600C.