It is well known that the addition of small amount of polymer to a turbulennewtonian fluid flow can result inreduction of drag forces, which has received considerable attention in anumber of liquid flow fields. Althoughthe dragreduction effect of polymers have been well investigated in singleliquid turbulent flow, while little works are done concerning the reduction odrag forces in twophase liquidgas flows.
The aim of present work is to use the analysis of variance (ANOVA) to study the effects of several variables on the corrosion process at different conditions of different metals under isothermal and heat transfer conditions. A study was carried out to investigate the effect of hydrodynamic variables as well as temperature and heat flux on corrosion of copper and iron metals.Two hydrodynamic geometries were investigated: cylinder in cross flow and rotating cylinder system under different ranges of temperature,Reynolds number and heat flux.
Prediction and correlation of accurate value of excess molar volume VE are of great interest for adequate design of industrial process and for theoritical purpose. In order to obtain accurate VE values attention has been turned to calculate it from quation Of State (EOS). It is to be noted that these equations of state were developed primarity for calculating vapour-liquid equilibirum and that the present use is some what outside their usual application.
