The use of both the API gravity and the Watson characterization factor provides a more complete description of the oil. Clearly, chemical composition, in addition to API gravity, plays a role in the viscosity behavior of crude oil.
In general, viscosity characteristics are predictable. Viscosity increases with decreases in crude oil API gravity assuming a constant Watson characterization factor and decreases in temperature. The effect of solution gas is to reduce viscosity.
Above saturation pressure, viscosity increases almost linearly with pressure. API gravity and Watson characterization factor. Viscosity calculations Viscosity calculations for live reservoir oils require a multistep process involving separate correlations for each step of the process.
Dead or gas-free oil viscosity is determined as a function of crude oil API gravity and temperature. The viscosity of the gas saturated oil is found as a function of dead oil viscosity and solution gas-oil ratio GOR.
Undersaturated oil viscosity is determined as a function of gas saturated oil viscosity and pressure above saturation pressure. Table 2 Table 3 Comparison of different methods Fig. The results illustrate the trend for dead oil viscosity and temperature. As temperature decreases, viscosity increases.
These tendencies make these methods unsuitable for use in the temperature range associated with pipelines. Dead oil viscosity correlations are somewhat inaccurate because they fail to take into account the chemical nature of the crude oil. Only methods developed by Standing  and Fitzgerald    take into account the chemical nature of crude oil through use of the Watson characterization factor.
Data should be acquired at temperatures over the range of interest. This method is recommended when measured dead oil viscosity data are available. Bubblepoint oil viscosity methods Table 4 Table 5 Correlations for bubblepoint oil viscosity typically take the form proposed by Chew and Connally.
This plot was developed with a dead oil viscosity value of 1. Correlations proposed by Labedi,   Khan et al. Correlations for undersaturated oil When pressure increases above bubblepoint, the oil becomes undersaturated.
In this region, oil viscosity increases nearly linearly with pressure. Tables 6 and 7                    provide correlations for modeling undersaturated oil viscosity.Viseosities of Vegetable Oils and Fatty Acids H.
Noureddini', B.C. Teoh and L.
|The activation energy can be obtained from the slope of the regression equation. Data Analyses Office Excel software was used to carry out the linear regressions for obtaining the absolute viscosity and activation energy of the oils.|
|Oil viscosity -||Kinematic viscosity of edible oils Abstraction This paper presents the development of ATmega32 microcontroller based kinematic viscousness measuring apparatus to mensurate viscousness of comestible oils at different temperatures utilizing redwood viscosimeter. This instrument system permits to maintain the temperature of the sample at any coveted value and recording of clip for the aggregation of 50 milliliter of sample to calculate its viscousness and to direct the information to personal computing machine to enable the computing machine processing of such informations.|
Davis Clements Department of Chemical Engineering, University of Nebraska, arteensevilla.comka Data for viscosity as a function of temperature from 24 Please refer to the preceding paper in this issue (3) for. In this study, Neural Network is used to determine the kinematic viscosity of edible oils at various temperatures using back propagation learning.
A three-layered neural network having seven neurons in hidden layer and one neuron in the input layer and one neuron in the output layer is used.
Absolute, Dynamic and Kinematic Viscosity - Dynamic, absolute and kinematic viscosities - convert between CentiStokes (cSt), centipoises (cP), Saybolt Universal Seconds (SSU) and degree Engler API Gravity - API gravity express the gravity or density of liquid petroleum products. Viseosities of Vegetable Oils and Fatty Acids H.
Noureddini', B.C. Teoh and L. Davis Clements Department of Chemical Engineering, University of Nebraska, arteensevilla.comka Data for viscosity as a function of temperature from 24 Please refer to the preceding paper in this issue (3) for.
Kinematic Viscosity The ratio of the absolute viscosity of a liquid to its density frequently occurs in the study of viscosity and hydraulics and the term "kinematic viscosity" with the symbol V has been assigned to it where p is the density.
A study was carried out to determine the effect of higher shear rates ( to s −1) on the absolute viscosities of different vegetable oils at different temperatures (26 to 90 ∘ C).