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deoiling-hydrocyclone
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Numerical investigation of the velocity field and separation efficiency of deoiling hydrocyclones
, Article Petroleum Science ; Volume 9, Issue 4 , 2012 , Pages 511-520 ; 16725107 (ISSN) ; Asadi, M ; Farhanieh, B ; Sharif University of Technology
2012
Abstract
Three-dimensional simulation of a multiphase flow is performed using the Eulerian-Eulerian finite volume method in order to evaluate the separation efficiency and velocity field of deoiling hydrocyclones. The solution is developed using a mass conservation-based algorithm (MCBA) with collocated grid arrangement. The mixture approach of the Reynolds stress model is also employed in order to capture features of turbulent multiphase swirling flow. The velocity field and separation efficiency of two different configurations of deoiling hydrocyclones are compared with available experimental data. The comparison shows that the separation efficiency can be predicted with high accuracy using...
Investigation of Two-Fluid Flow Contains Oil and Water in Hydrocyclones
, Ph.D. Dissertation Sharif University of Technology ; Farhanieh, Bijan (Supervisor) ; Firoozabadi, Bahar (Co-Advisor)
Abstract
Having an efficient and reliable system for oil-water separation especially in offshore oil and gas industry is of crucial importance. Due to the platform movement, space, weight and operating limitations in offshore industries, using common methods, (e.g. gravity based vessels), for oil-water separation is ineffective. On the other hand, producing oil on offshore platforms is often accompanied by large discharge of oil-contaminated water into the sea, resulting in environmental pollution. Therefore a need for high efficiency compact separators capable of operation in various operating conditions arises. One solution to the mentioned problem is the use of hydrocyclone separators. The...
Numerical Investigation of Turbulent Flow Inside De-Oiling Hydrocyclones Using Large Eddy Simulation Approach
, M.Sc. Thesis Sharif University of Technology ; Farhanieh, Bijan (Supervisor)
Abstract
Hydrocyclones are used for separating different materials from liquids in a variety of applications. Compactness, efficiency, reliability and low maintenance costs are their noteworthy characteristics. Dewatering and deoiling hydrocyclones used for refining crude oil or oily waste water in offshore platforms are examples of liquid-liquid hydrocyclones. Separation process in hydrocyclones is based on the fact that swirl flow induces a centrifugal force and leads to separation due to density difference. The density difference in liquid-liquid mixtures is smaller than solid-liquid types and trying to separate one liquid from another takes much more effort than the other type. Increase of...
Numerical investigation of cone angle effect on the flow field and separation efficiency of deoiling hydrocyclones
, Article Heat and Mass Transfer/Waerme- und Stoffuebertragung ; Volume 49, Issue 2 , February , 2013 , Pages 247-260 ; 09477411 (ISSN) ; Maddahian, R ; Farhanieh, B ; Sharif University of Technology
2013
Abstract
In this study, the effect of cone angle on the flow field and separation efficiency of deoiling hydrocyclones is investigated taking advantage of large eddy simulation. The dynamic Smagorinsky is employed to determine the residual stress tensor of the continuous phase. The method of Lagrangian particle tracking with an optimized search algorithm (closest cell) is applied to evaluate the separation efficiency of deoiling hydrocyclone. Simulations are performed on a 35-mm deoiling hydrocyclone with the three different cone angles of 6, 10 and 20 degree. The numerical results revealed that the changes in the cone angle would affect the velocity and pressure distribution inside hydrocyclone, and...
Modeling of flow field and separation efficiency of a deoiling hydrocyclone using large eddy simulation
, Article International Journal of Mineral Processing ; Volume 112-113 , 2012 , Pages 84-93 ; 03017516 (ISSN) ; Maddahian, R ; Farhanieh, B ; Afshin, H ; Sharif Unviersity of Technology
Elsevier
2012
Abstract
In order to evaluate the separation efficiency and flow field of deoiling hydrocyclones a three dimensional simulation is performed using large eddy simulation (LES) approach. Although this approach has been used in other types of hydrocyclones, the present work is a primer application of the LES approach for simulation of deoiling hydrocyclones. Due to anisotropic behavior of flow inside the hydrocyclones, LES is a suitable method to predict the flow field since it resolves large scales and models isotropic small scales. Obtained velocity field using the LES approach in comparison with other turbulence models is in good agreement with available experimental velocity measurements. The method...