RHEOLOGICAL PROPERTIES AND FLOW OF CONCENTRATED DISPERSE MEDIA. II - STEADY AND UNSTEADY FLOW ANALYSIS OF HEAVY CRUDE OIL EMULSIONS

Experimental study of steady flows of heavy crude oil emulsions in rectilinear ducts provides evidence of a non newtonian behaviour in good agreement with viscometric rheological data. Superimposing an unsteady flow on the mean one, the mean flow rate is shown to be strongly increased under conditions depending on the frequency and the values of the mean and oscillatory components of the pressure gradient. The mean features of such an enhancement are then interpreted in relation to the rheological behaviour of the fluid.     

RHEOLOGICAL PROPERTIES AND FLOW OF CONCENTRATED DISPERSE MEDIA I - MODELLING OF STEADY AND UNSTEADY BEHAVIOR

A steady viscosity model, including both volume fraction and shear rate variables, is shown to be applicable to a large class of complex liquids which can be considered as highly concentrated disperse media. The effect of yield stress is taken into account. For unsteady measurements, this model, which includes thixotropy, can be simply extended to viscoelastic behaviour. Some examples of application will be given, specially to heavy crude oil emulsions.     

RHEOLOGICAL PROPERTIES AND FLOW OF CONCENTRATED DISPERSE MEDIA I - MODELLING OF STEADY AND UNSTEADY BEHAVIOR

Abstract

A steady viscosity model, including both volume fraction and shear rate variables, is shown to be applicable to a large class of complex liquids which can be considered as highly concentrated disperse media. The effect of yield stress is taken into account. For unsteady measurements, this model, which includes thixotropy, can be simply extended to viscoelastic behaviour. Some examples of application will be given, specially to heavy crude oil emulsions.     

日本石油公司根岸炼油厂含硫原油加工和重油深加工情况介绍

介绍了日本石油公司根岸炼油厂加工含硫原油的流程特点，防腐蚀、防中毒和环境保护对策，重油深加工的技术措施。