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March 2, 2010, 02:05 |
Effect of dust outlet diameter in cyclones
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#1 |
New Member
Esmail
Join Date: May 2009
Posts: 11
Rep Power: 16 |
Hello to all
I have been working on the CFD simulation of the natural gas flow in cyclones for more than 4 monthes. I am trying to predict the optimum design parameters of the cyclone in terms of separation efficiency and pressure drop. I encounter to a problem in analysing the results of the simulations. I have got no valuable decrease in the separation efficiency for 1-4 micro meter solid particles (2700 kg/m3) when diamtere of the dust outlet increases even when the cone shape was replaced with a straight pipe. The inlet velocity is 8.6 m/s and the only different design parameter in the simulated cyclone in comparison to other cyclones is that there is a larger space between the bottom of the vortex finder pipe and start point of cone shape. I used th fluent CFD Package with different turbulence model but still the problem is not fixed. RSM Model Pressure disc. = Presto Momentum disc. = QUICK Turbulence and Reynolds Stress disc. = Second order k-e model Pressure disc. = Presto Momentum disc. = Second order Turbulence disc. = Second order How do u think about this problem? Thanks a lot Best Wishes Esmail Mahmoudi Saber |
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