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Challenge 8 – Simulating Cyclone Separator using Discrete Phase Modelling Aim – To simulate the CFD of a cyclone separator and calculate the separation efficiency by varying the fluid inlet velocity, particle inlet velocity and diameter of particles Introduction to the Cyclone Separator and several empirical…
Vedant Joshi
updated on 02 May 2021
Challenge 8 – Simulating Cyclone Separator using Discrete Phase Modelling
Aim – To simulate the CFD of a cyclone separator and calculate the separation efficiency by varying the fluid inlet velocity, particle inlet velocity and diameter of particles
Introduction to the Cyclone Separator and several empirical models used to calculate the collection efficiency –
Working of a cyclone separator - A cyclone is a centrifugal separator in which particles, due to their mass, are pushed to the outer edges as a result of centrifugal force. Incoming air is automatically forced to adopt a fast-revolving spiral movement - the so-called double vortex. This double spiral movement consists of an outer stream, which flows downwards in a spiral, and an inner stream, which flows upwards in a spiral. At the interchange between both streams, air passes from one stream to the other. The particles which are present in the air are forced to the outer edges and leave the separator via a collection device fitted to the bottom of the separator.
4 empirical models to calculate the collection efficiency of a cyclone separator –
2. Koch and Licht Model – IN this particular case, this theory recognised the inherently turbulent nature of cyclones and the distribution of gas residence within the cyclone
The following assumptions were made
4. Lozia and Leith model – this model is based on force balance. The model assumes that a particle is carried by the vortex endures the influence of two forces – a centrifugal and flow resistance. The collection efficiency can be calculated as -
Solving and Modelling Approach –
Meshing –
Setting up the case in Ansys Setup –
Results and findings –
Conclusions and inferences –
Reference research Papers -
1. https://www.sciencedirect.com/science/article/pii/S0307904X06000291
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