Analysis of Multiphase Flow Centrifuge Decanter Separator Using CFD Simulations
Typ
Examensarbete för masterexamen
Program
Innovative and sustainable chemical engineering (MPISC), MSc
Publicerad
2022
Författare
Khogali, Ahmed
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
In the industry, it is common to encounter multiphase flow in many different applications
in the oil and gas, food production and waste treatment industries. The
nature of multiphase flow is extremely complex and is continuously developing in
terms of methods and tools to perform analysis. One device in the industry involving
mutiphase flow is the centrifuge decanter separator for sewage water treatment
with the aim of separating fluid and solids. The centrifuge decanter in this study
is a separator from Alfa Laval (AL). This study aims at analyzing the decanter by
using computational fluid dynamics (CFD) as a simulation tool in combination with
the field of multiphase flow modeling to understand the decanter’s different components
and complex functions at high rotational speeds. This makes the decanter a
very demanding topic for this type of research. The analysis of the phenomena was
done through systematic changes in parameters, strategies and models. The Euler-
Euler and Mixture multiphase models were used to predict the distribution of water
and solids throughout the domain within the decanter separator and determine how
efficient the separation process is in terms of the amount of exiting solids. Operation
parameters such as the differential speed of the decanter parts and boundary
conditions within the domain were analyzed and results were presented.
Beskrivning
Ämne/nyckelord
CFD , Multiphase , Decanter , Separator , Mixture Model , Euler-Euler , Simulation , ANSYS