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-   -   Multiple cell zones in FLUENT (http://www.cfd-online.com/Forums/fluent/92285-multiple-cell-zones-fluent.html)

bluemonkee September 8, 2011 18:55

Multiple cell zones in FLUENT
 
I am trying to create multiple cell zones so that I can have different porosity in each zone. This is a 2-D asymmetric model, and I generated the mesh using Ansys's Design Modeler and Meshing tools. Right now, I can get several zones, but FLUENT is requiring that the lines between each zone has its own boundary condition (FLUENT has assigned all of these lines names that begin with "surface_"). Is there a way to remove the surfaces from the model in FLUENT? Or is there a better way to use the ANSYS tools to create a multiregion model?

Thanks for your help!

rohit.mukare7 November 1, 2011 10:57

hi i am also facing the same problem.plz let me knw if u could solve that..

CFD_rocks November 3, 2011 11:38

I am also having the same problem, any one got an idea?!

swetkyz November 5, 2011 10:29

If I understand correctly, you are just trying to get all of the zones to behave as one continuous fluid domain. Ideally, you would want to generate a conformal mesh, which you can do by making all of your zones one 'part' in Design Modeler. You can do this by selecting them and right clicking then selecting "form new part".

To connect the fluids at the interfaces, you need to merge the two surfaces at each interface (between fluid zones). To do this go to 'Mesh Interfaces' under 'Problem Setup' in the menu bar on the left. It is fairly straightforward from there.

Hopefully this helps.

-Zachariah

CFD_rocks November 8, 2011 08:24

Thanks, it did help a lot!

sumanth_0811 January 20, 2013 06:11

How to go about it?
 
Can anyone help me with the creation of multiple zones during meshing?
Is there a tutorial for that?

fn1743 March 5, 2013 02:25

how do i draw a 2D block capable of being split into two zones? I need to create a free surface in a tank.

thanks

Volumeoffluid November 13, 2013 08:23

Quote:

Originally Posted by swetkyz (Post 330831)
If I understand correctly, you are just trying to get all of the zones to behave as one continuous fluid domain. Ideally, you would want to generate a conformal mesh, which you can do by making all of your zones one 'part' in Design Modeler. You can do this by selecting them and right clicking then selecting "form new part".

To connect the fluids at the interfaces, you need to merge the two surfaces at each interface (between fluid zones). To do this go to 'Mesh Interfaces' under 'Problem Setup' in the menu bar on the left. It is fairly straightforward from there.

Hopefully this helps.

-Zachariah

Hi Zachariah,
so i did exactly what you say, but what i should define this line between two fluids??as interface??or as moving wall?
Thank you in advance!

hamid-nice May 8, 2016 09:22

Mark and patch
 
Hello Dears

I have a pipe with oil and a water droplet is in the middle of it

I use of "Form New part" and solve my Boundary condition where I have a boundary for droplet as interior
But there is a problem now:
there is not in the mark list for marking for patching because it is interior type now
it gose to control switch

how can I patch the interior droplet for define only one phase (water) for it ?
regard

kevinxichan May 10, 2016 11:34

Quote:

Originally Posted by hamid-nice (Post 599165)
Hello Dears

I have a pipe with oil and a water droplet is in the middle of it

I use of "Form New part" and solve my Boundary condition where I have a boundary for droplet as interior
But there is a problem now:
there is not in the mark list for marking for patching because it is interior type now
it gose to control switch

how can I patch the interior droplet for define only one phase (water) for it ?
regard

What I did for droplet sliding on a solid surface was
1. draw the chamber/channel in design modeler without the droplet
2. mesh it
3. in fluent, adapt the region you want to put a droplet and mark it
4. patch the adapted region to the secondary phase(i.e. water)

hamid-nice May 10, 2016 14:42

answer
 
hi Dear kevinxichan

I don't want to use of mark regine in fluent because I want to use of different tyes of shape of droplet like elilp or other nontipically shape so I think it is not possible with this switch so I should model it with other software and import to fluent

regard

hamid-nice May 26, 2016 09:50

check patched
 
Dear kevinxichan

I try your suggestion
I marked and patched the second phase (water droplet)

before runing and calculating , I only can see the regine patched with management register window
but it can not show the phases in contour when i choose phases
when i click on display button in contour window

Question : must I see the regin patched before calculation ?
how can check the patch before calculation ? why can not I see in contour now ?

regard


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