CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[DesignModeler] Design modeller vs. Gambit: Solid and Liquid modelling

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   March 25, 2015, 17:32
Question Design modeller vs. Gambit: Solid and Liquid modelling
  #1
Member
 
Buddha's fight
Join Date: Mar 2013
Posts: 40
Rep Power: 4
nvarma is on a distinguished road
Hi guys,
I have been using Gambit for models that have solid(conduction) and liquid, and workbench(DM+meshing) for fluid only applications.

As you might know it's possible in gambit to "sweep" intersecting profiles and hence allowing me to create solid and fluid volumes in a single go.

However in such cases I find that DM is difficult in that, I have to create separate sketches for both solid and liquid regions and then extrude them with frozen in between. Or I can create fluid only volume first and then create and subtract it from a bounding volume.

Right?

Is there an easier way in DM to create both liquid and solid volumes in a single go (like in gambit). With equal level of experience in both, I find DM to be significantly more time consuming than Gambit. Am I doing it wrong?
nvarma is offline   Reply With Quote

Old   March 26, 2015, 16:58
Default
  #2
Member
 
Buddha's fight
Join Date: Mar 2013
Posts: 40
Rep Power: 4
nvarma is on a distinguished road
*bump* Anyone?
nvarma is offline   Reply With Quote

Old   March 27, 2015, 04:40
Default
  #3
Senior Member
 
Join Date: Mar 2014
Posts: 176
Rep Power: 3
hwet is on a distinguished road
I am not sure what you are talking about... could you describe the actual geometry, or attach a picture of it, preferably jpg as i dont have access to Ansys at the moment
hwet is offline   Reply With Quote

Old   March 27, 2015, 10:00
Default
  #4
Member
 
Buddha's fight
Join Date: Mar 2013
Posts: 40
Rep Power: 4
nvarma is on a distinguished road
Quote:
Originally Posted by hwet View Post
I am not sure what you are talking about... could you describe the actual geometry, or attach a picture of it, preferably jpg as i dont have access to Ansys at the moment
I cannot attach the exact design..for reasons.

Anyway, assume I have a hollow cylinder with fluid inside. There are two ways to do it in work bench:

1. Create the hollow cylinder by extrusion of a sketch. Freeze. Create another sketch for the inner cylinder and extrude it.

OR

2. Create the hollow cylinder by extrusion of a sketch. Create another sketch for the outer circle, extrude and subtract.

Now I mark the outer shell as solid and inner as fluid - in fluent and mesher.

In gambit:

I just need to create one sketch with two concentric circles. Mesh the faces and sweep it. I will have two volumes.


So I feel like Gambit is easier for such cases or I am doing something really dumb on workbench. I hope I am clear now..

In other words Gambit allows sweep and revolve of intersecting sketches, workbench does't.

So is there an alternate way to create liquid and solid volumes in workbench?
nvarma is offline   Reply With Quote

Old   March 27, 2015, 10:59
Default
  #5
Senior Member
 
Join Date: Mar 2014
Posts: 176
Rep Power: 3
hwet is on a distinguished road
So what is the question then? is there another way? there can be, but if you already have what you need rather go ahead with it. you might want to create one cylinder and create an imprint in it for the fluid part, not sure though what you actually want out of this...
hwet is offline   Reply With Quote

Old   April 9, 2015, 16:04
Default
  #6
Member
 
Buddha's fight
Join Date: Mar 2013
Posts: 40
Rep Power: 4
nvarma is on a distinguished road
Yes. I'm here again.

The problem is I might have to go through the same procedure for different projects, so I'd like to do it the most efficient way.

I figured that Ansys WB unlike Gambit doesn't allow extrusion of intersecting surfaces or meshes which takes away a lot of flexibility.

In gambit both solid and fluid regions could be modeled in a single go without having to do any Boolean or multiple sketches. So it barely took half the manhours put into the same task in workbench.
nvarma is offline   Reply With Quote

Reply

Tags
gambit 2.2.30

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Liquid Variables in Solid Domain callahance CFX 1 January 27, 2014 17:59
error message cuteapathy CFX 14 March 20, 2012 07:45
Calculating total compressibility for a liquid + porous solid system bzz77 Main CFD Forum 0 February 12, 2012 15:45
Constant velocity of the material Sas CFX 15 July 13, 2010 08:56
Shacking CAN VOF HEAT LIQUID SOLID Optixxx FLUENT 0 July 30, 2005 11:42


All times are GMT -4. The time now is 10:12.