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

nvarma · March 25, 2015, 17:32

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 · March 26, 2015, 16:58

*bump* Anyone?

hwet · March 27, 2015, 04:40

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

nvarma · March 27, 2015, 10:00

Quote:

Originally Posted by hwet

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?

hwet · March 27, 2015, 10:59

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...

nvarma · April 9, 2015, 17:04

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.

March 25, 2015, 17:32	Design modeller vs. Gambit: Solid and Liquid modelling	#1
nvarma Senior Member nm Join Date: Mar 2013 Posts: 100 Rep Power: 13	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?

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March 26, 2015, 16:58		#2
nvarma Senior Member nm Join Date: Mar 2013 Posts: 100 Rep Power: 13	bump Anyone?

March 27, 2015, 04:40		#3
hwet Senior Member Join Date: Mar 2014 Posts: 375 Rep Power: 13	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

March 27, 2015, 10:59		#5
hwet Senior Member Join Date: Mar 2014 Posts: 375 Rep Power: 13	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...

April 9, 2015, 17:04		#6
nvarma Senior Member nm Join Date: Mar 2013 Posts: 100 Rep Power: 13	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.