The flow field of a 2 in. hydrocycl

The flow field of a 2 in. hydrocyclone is shown to be significantly asymmetric without precession, through both computational
fluid dynamics (CFD) and experimental observation. Hence the application of full three-dimensional modelling is demonstrated to
be essential. Further, CFD predicts that the axial pressure is not below atmospheric prior to development of the air core and that
such development is not pressure driven. In fact, initial insight into a cause of instability of the air-core is identified from the CFD
and supported through experimental observation. The predictions use the second-order differential-stress turbulence model which
has previously been identified to represent a minimum model. Lastly, the inclusion of full three-dimensional modelling and highorder
turbulence modelling leads to a new understanding of particle-separation classification within the hydrocyclone, including a
significant stochastic component.

2004 Published by Elsevier Ltd.

Results (English) 2:

The Flow Field of a 2 in. Hydrocyclone is shown to be significantly asymmetric Without precession, Through Computational Both.
Fluid Dynamics (CFD) and Experimental Observation. The Application of Three-dimensional full hence Modelling is demonstrated to.
be Essential. Further, that CFD Predicts The Axial Atmospheric pressure is Not Below Prior to Development of The Air core and that.
Such pressure driven Development is Not. In Fact, a Cause of instability of Initial Insight Into The Air-core is identified from The CFD.
Experimental Observation and Supported Through. The predictions Second-Order Use The differential-Stress Model which turbulence.
has previously been identified to represent a Minimum Model. Lastly, The inclusion of full Three-dimensional Modelling and Highorder.
turbulence Modelling Leads to a New Understanding of Particle-Separation Within The Hydrocyclone Classification, including a.
significant stochastic Component.
? 2004 Published by Elsevier Ltd.