Comparison of Multiphase-Flow Correlations With Measured Field Data of Vertical and Deviated Oil Wells in India (includes associated paper 20380)

1989 ◽  
Vol 4 (03) ◽  
pp. 341-349 ◽  
Author(s):  
R. Rai ◽  
I. Singh ◽  
S. Srini-vasan
Keyword(s):  
Multiphase Flow ◽  
Field Data ◽  
Oil Wells ◽  
Measured Field

Post-processing of measured field data using equivalent source technique

2011 ◽  
Author(s):  
L. J. Foged ◽  
L. Scialacqua ◽  
F. Saccardi ◽  
J. L. Araque Quijano ◽  
G. Vecchi ◽  
...  
Keyword(s):  
Field Data ◽  
Post Processing ◽  
Equivalent Source ◽  
Measured Field

A practical technique for estimating service life of MSW leachate collection systems

2013 ◽  
Vol 50 (2) ◽  
pp. 165-178 ◽  
Author(s):  
R. Kerry Rowe ◽  
Yan Yu
Keyword(s):  
Numerical Model ◽  
Service Life ◽  
Field Data ◽  
Oxygen Demand ◽  
Collection System ◽  
Leachate Collection ◽  
Design Charts ◽  
Leachate Characteristics ◽  
Practical Model ◽  
Measured Field

The leachate characteristics and clogging of the leachate collection system at the Keele Valley Landfill is examined using the numerical model “BioClog”. The calculated effluent leachate concentrations (e.g., the chemical oxygen demand and calcium concentrations) and calculated calcium fraction in the clog material are in encouraging agreement with measured field data. A new practical model is developed and calibrated against the data from the sophisticated numerical model to estimate the service life of leachate collection systems in typical municipal solid waste (MSW) landfills. The procedures for using the new practical model are provided and illustrated by examples. Design charts are presented that may aid the design of leachate collection systems for typical MSW landfills.

scholarly journals Quantification of the unknown HONO daytime source and its relation to NO<sub>2</sub>

2011 ◽  
Vol 11 (5) ◽  
pp. 15119-15155 ◽  
Author(s):  
M. Sörgel ◽  
E. Regelin ◽  
H. Bozem ◽  
J.-M. Diesch ◽  
F. Drewnick ◽  
...  
Keyword(s):  
Nitrogen Oxides ◽  
Gas Phase ◽  
Water Vapour ◽  
Field Data ◽  
Mixing Ratios ◽  
Photostationary State ◽  
Conversion Frequency ◽  
Photolysis Frequency ◽  
Electronically Excited ◽  
Measured Field

Abstract. During the DOMINO (Diel Oxidant Mechanism In relation to Nitrogen Oxides) campaign in southwest Spain we measured simultaneously all quantities necessary to calculate a photostationary state for HONO in the gas phase. These quantities comprise the concentrations of OH, NO, and HONO and the photolysis frequency of NO2, j(NO2) as a proxy for j(HONO). This allowed us to calculate values of the unknown HONO daytime source. This unknown HONO source, normalized by NO2 mixing ratios and expressed as a conversion frequency (% h−1), showed a clear dependence on j(NO2) with values up to 43 % h−1 at noon. We compared our unknown HONO source with values calculated from the measured field data for two recently proposed processes, the light-induced NO2 conversion on soot surfaces and the reaction of electronically excited NO2* with water vapour, with the result that these two reactions normally contributed less than 10 % (<1 % NO2 + soot + hν; and <10 % NO2* + H2O) to our unknown HONO daytime source. OH production from HONO photolysis was found to be larger (by 20 %) than the "classical" OH formation from ozone photolysis (O(1D)) integrated over the day.

scholarly journals A Study of Pressure Gradient in Multiphase Flow in Vertical Pipes

2019 ◽  
Vol 4 (1) ◽  
pp. 54-59
Author(s):  
David Nwobisi Wordu ◽  
Felix J. K. Ideriah ◽  
Barinyima Nkoi
Keyword(s):  
Pressure Drop ◽  
Multiphase Flow ◽  
Pressure Gradient ◽  
Performance Optimization ◽  
Field Data ◽  
Oil And Gas ◽  
Liquid Velocity ◽  
Petroleum Industry ◽  
Well Performance ◽  
Flowing Fluid

The study of multiphase flow in vertical pipes is aimed at effective and accurate design of tubing, surface facilities and well performance optimization for the production of oil and gas in the petroleum industry by developing a better approach for predicting pressure gradient. In this study, field data was analyzed using mathematical model, multiphase flow correlations, statistical model, and computer programming to predict accurately the flow regime, liquid holdup and pressure drop gradient which are important in the optimization of well. A Computer programme was used to prediction pressure drop gradient. Four dimensionless parameters liquid velocity number (Nlv), gas velocity number (Ngv), pipe diameter number (Nd), liquid viscosity number (Nl), were chosen because they represent an integration of the two dominant components that influence pressure drop in pipes. These dominant component are flow channel/media and the flowing fluid. The model was found to give a fit of 100% to the selected data points. Hagedorn & Brown, Griffith &Wallis correlations and model were compared with field data and the overall pressure gradient for a total depth of 10000ft was predicted. The predicted pressure gradient measured was found to be 0.320778psi/ft, Graffith& Wallis gave 0.382649Psi/ft, Hagedorn & Brown gave 0.382649Psi/ft; whereas generated model gave 0.271514Psi/ft. These results indicate that the model equation generated is better and leads to a reasonably accurate prediction of pressure drop gradient according to measured pressure gradient.

scholarly journals Analysis of Performance of a Twin-Shaft Gas Turbine During Hot-End Damage in the Gas Generator Turbine

2018 ◽  
Author(s):  
Samuel Cruz-Manzo ◽  
Sepehr Maleki ◽  
Vili Panov ◽  
Festus Agbonzikilo ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Field Data ◽  
Dynamic Change ◽  
Correlation Coefficients ◽  
Physical Parameters ◽  
Gas Generator ◽  
Simulink Model ◽  
Flow Capacity ◽  
High Power Operation ◽  
Measured Field

In this study, an analysis of the performance of a twin-shaft industrial gas turbine (IGT) during hot-end damage in the gas generator turbine (GGT) at high-power operation has been carried out using a validated Simulink IGT model. The Simulink model is based on fundamental thermodynamics and allows the implementation of correlation coefficients in the GGT module to predict the performance of the IGT system during a hot-end GGT damage incident. Measured field data from a twin-shaft IGT operated as a power generation unit denoting a reduction in performance due to hot-end GGT damage are considered for the analysis. Four hot-end GGT damage incidents across a range of measured field data have been identified and considered for the analysis. The results show that the Simulink model can predict the change of physical parameters (pressure, temperature) across the IGT system for each GGT damage incident. Hot-end damage increases the flow capacity and reduces the efficiency of the GGT. Future work will validate the dynamic change of flow capacity and efficiency during different GGT damage incidents.

Wellsim and Pepite: Accurate Models of Multiphase Flow in Oil Wells and Risers

1988 ◽  
Author(s):  
A. Roux ◽  
J. Corteville ◽  
M. Bernicot
Keyword(s):  
Multiphase Flow ◽  
Oil Wells
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