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sacha November 5, 2003 11:41

solid particles
 
Hi all I would like to simulate solid particles in a liquid using CFX5-6. In CFX-pre (Domain->General Options->basic setting) I could not access to particles list as shown in the online documentation (CFXPre Domains-general Options page 189). The only possibility I can access is Particles List for Particle tracking. But I want to model an Eulerian-Eulerian multiphase flow.

How then to define my solid particles?

Thank you

Eldoret November 8, 2003 04:36

CFX Please talk!!
 
Please CFX support, could you say something categoric about this, in the light of the very explicit questions that have be put by: 1.Sacha 2.Amara 3.Eldoret 4.maseno

This is an issue of common interest. We do understand the complexity involved and the inherent limitations that any software like CFX is bound to have. CFX is ours by choice and we proudly support it, please help us do that.

Thanks, Eldoret

Robin November 8, 2003 12:04

Re: CFX Please talk!!
 
Firstly, if you expect support from CFX on this site you are looking in the wrong place. CFD Online has no affiliation with ANSYS CFX or any other vendor for that matter.

As for your question, setting up Eularian-Eularian multiphase is the same for solid particles as it is for liquid droplets or gas bubbles. In the case of solid particles, the dispersed phase is chosen to be a solid material instead of liquid or gas, and their are some additional parameters which can be defined, such as packing factor.

So, to set up Eularian-Eularian particle transport, simply multiple select your fluid and solid from the materials list in the Domains form. Once you have done so, additional panels will appear in the domains form to set other multiphase settings. You can have as many phases as you like, and can even mix solid and fluid dispersed phases.

If you are still confused, try running the bubble column tutorial and then review the documentation on multiphase modelling.

Regards, Robin

Eldoret November 10, 2003 03:39

Re: CFX Please talk!!
 
Hi Robin, You said.... ""So, to set up Eularian-Eularian particle transport, simply multiple select your fluid and solid from the materials list in the ""Domains form??????.""

I can not see the MATERIAL LIST in the DOMAIN FORM. I can just see FLUIDS LIST, but solids are not in the list. Remember, Particles list is available for Eulerian-Lagrangian, but we are not going that route.

Have you done this yourself?? Are we talking about the same thing here?? Sorry Robin, there must be something different!!

regards Eldoret


Robin November 10, 2003 12:49

Re: CFX Please talk!!
 
!!!!!!I really hate it when people use multiple punctuations!!!!!!

Sorry, just had to get that off my chest. Disregard my previous post, you need to define a fluid material with the appropriate properties and select that fluid along with your continuous phase material. In the panel for that fluid which follows, choose the option "Dispersed Solid".

-Robin

P.S. I think I'll just respond to posts on the CFX Community Forum now.

Eldoret November 10, 2003 13:29

Re: CFX Please talk!!
 
Thanks Robin, and sorry! [only one punctuation this time]. The post was not meant to irritate you.

Kind regards Eldoret


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