In this paper, a series of fluid dynamic simulations using a CFD methodology to predict the separation performances of a typical finger-type slug catcher geometry are carried out. The study also aims to provide new model, in order to getabetter separation and fluidsmanagement. In order that this aim may be realized, the following objectives have been undertake.
- In this work, a series of fluid dynamic simulations using a CFD methodology to predict the separation performances of a typical finger-type slug catcher geometry is carried out. The geometry chosen is a multiple-pipe slug catcher, since it is the geometry which can be more commonly found in practice. In the simulation carried out a simplified slug catcher finger type geometry was used. The geometry used was a typical geometry in order to give a general methodology for checking the performance of a slug catcher
- One of the objective of this research project is to maximize the potential efficiency of separation between gas and liquid phase using finger-type slug catcher by increasing the mass flow distribution inside the finger type slug catcher. By adding additional split at the inlet pipe, more gas can be separated inside the slug catcher due to the more efficient mass dispersion and this will decrease the slug flow and stabilize the flow itself.
- The two-phase flow in the separation section is simulated to study the amount of liquid at the intersection with and through the gas riser, showing the phase volume fraction of the liquid condensate mixture. Therefore, different particles design are studied to identify the amount of liquid particles exiting the gas riser pipe after the separation section. Accurate CFD results will be presented to provide insight in how the interface between the natural gas and the liquid condensate, containing liquid droplets, behaves.
- Different modifications on the design were tested to find the solution that would give more efficient separation. Guidelines for the correct implementations of these kinds of simulations are reported and the impacts of modelling assumptions on the expected results are discussed. The main technical contributions of the paper are:
- testing the validation of the slug catchers by means of numerical simulations;
- verifying the design choices in order to optimize the geometry of the slug catcher in relation to the conditions of use.
Note: I have made 5 modification on the original design and one final design. I used Ansys software to do the geometry, Icem for tetra meshing and Fluent for the simulation of two phase flow in the finger type slug-catcher:
- Two inlet splitter designs to choose which one of them are better in spreadingthe fluid.
- Extra downcomerfor better separating the liquid from the gas.
- Extra gas header for better separating the gasfrom theliquid.
- Extra splitter header to reduce the fluid velocity for better separation.
- Proposed design.
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