Hi,

Can CFX model the capture of dust particle by droplet?

Thanks in advance

Nuray

I think so! Give a look at Tutorial (pdf file) within CFX-v5.6.

The name of the file is "Tut09ButterflyValve.pdf".

To set the Water at 25 C models 1. Click the Water at 25 C tab. 2. Leave the Morphology Option set to Continuous Fluid. To set the Sand Fully Coupled models The models set on this panel relate only to the Sand Fully Coupled phase.

1. Click the Sand Fully Coupled tab. 2. Set the Morphology Option to Solid Particles. 3. Enable the Particle Diameter Distribution toggle: (a) Set the Option to Normal in Diameter by Mass. (b) Enter the Min. Diameter as 50e-6 m (i.e. 50 microns). (c) Enter the Max. Diameter as 500e-6 m (i.e. 500 microns). (d) Enter the Mean Diameter as 250e-6 m. (e) Enter the Std Deviation as 70e-6 m.

To set the Sand One Way Coupled models The models set on this panel relate only to the Sand One Way Coupled phase.

1. Click the Sand One Way Coupled tab. 2. Set the same Morphology Option and Particle Diameter Distribution settings as for the Sand Fully Coupled particles. To set the Fluid Pairs model The models set on this panel relate to the interaction of the water and sand.

1. Click the Fluid Pairs tab. 2. With Water at 25 C | Sand Fully Coupled selected in the Fluid Pairs list, set the Particle Coupling to Fully Coupled. 3. Select Water at 25 C | Sand One Way Coupled from the Fluid Pairs list and set the Particle Coupling to One-way Coupling. 4. Click Ok to commit the Domain properties.

Dear Brito,

Thank you for comments. In the tutorial "Flow Through a Butterfly Valve" There is two phase water and sand. Perhaps I should have been more clear on my question. Modelling for capture of dust particles by droplets has three phases. The aim is to capture dust particles from gas stream by spraying water over it. Liquid water is atomized and turn into droplets. Both water droplets and dust particles flow in the gas phase. Water droplets capture dust particles and separate itself from gas phase due to some mechanisms. This problem requires tracking both particle and droplet tracking at the same time and it might be possible to assume that when they are in the same cell droplet captures fine solid particles.

Best regards Nuray

[Agasty]

hi Nuray

I saw this post just now.. but i am curious as to what was the result of the work you have mentioned above? I mean was it successful.. i would like to do something similar but am having troubles with water as droplets (that is i cannot have water droplets.. is giving water as dispersed phase in the domain definition is good enough)

Regards Amit

[stumpy]

There's a hidden capability to track particles in only 1 Eulerian phase of a multiphase case. When the particles leave one of the phases they are terminated and appear as a separate line in the Particle Fate history in the out file. You have to edit the CCL to set this up, so I would contact support for the details.

[sutiut]

Can anybody solve the problem and model the interaction of dust and particles??? thanks

[ghorrocks]

Please start a new thread for new questions.

And when you do, explain what you are asking - the question you have asked here is so vague as to be unanswerable.