Learning Forum

[Nitin Mahankali]

Hello
i want to find the deformation of glass material by applying load on it and also i am applying heat to material by keeping it in heating furnace.
here i am increasing the temperature of the matarial from room temperature to 900 C and apply a fixed load on one side of the surface.
how to run this kind of analysis to find the deformation of molten fluid glass? 

this glass material is placed in between steel plates and purpose of the glass is to works as a sealant material.
i want to find deformation of glass in all directions. which simulation model i need to apply?

2 steal plates are rectangular plates with 10 mm thickness 

[Rob]

How fluid is the glass? Ie fully pouring or creeping: so fluid or nearly solid? 

Asuming the glass is a liquid. If you want to apply a force which can be countered by the fluid then you'll need to code up how the moving block behaves. If you just want to move at a set rate it'll be easier. You can then look at remeshing/layering. There are a couple of videos in Help covering this in Fluent. You may also require VOF to track the edges of the domain.

If the glass is more solid have a look at the fluid elements in Mechanical as it may be more suitable. 

[Nitin Mahankali]

thanks for the reply

glass material is nerly solid. (temperature will raise from room temperature and crosses the glass transition temperature)

i am applying constant force on the first metal block on one side and other side of the second metal block is fixed to the ground. in between these two metal blocks glass sealant is placed

if there are any tutorial videos of this kind of simulation, please share that with me.

 

[Rob]

I'm not aware of any tutorials. It's in the grey area between Fluent (pure flow CFD), Polyflow (viscoelastic fluids, typically extrusion modelling) and Mechanical (bendy stuff using FEA). 

[Nitin Mahankali]

thanks for giving information about tutorials.

i didn't understand the second message, can you please give me a detailed instruction about that?

[Rob]

Basically, glass is a weird fluid. So, you may want to review what Fluent, Polyflow and Mechanical can do. Each can model glass in a slightly different way: the level of fluidity is what's going to guide you to the best approach & solver. 

[Nitin Mahankali]

how to do this kind of simulation in fluent?

 

 

[Nitin Mahankali]

please give me a detailed description. it will help me a lot

[NickFL]

What Rob is saying is that there is not a straightforward answer. It depends on your problem and what results you are trying to obtain. Fluent, Polyflow and Mechanical are all tools under the ANSYS simulation group. Just as a hammer, a screwdriver and a saw are different physical tools, these softwares have been developed to do certain jobs. Are you sure Fluent is the right tool and not one of the others? You would be working on the limits of what any of these programs can do.

[Nitin Mahankali]

i have seen few videos regarding similar kind of simulation which showed fluent tool to solve the melting material simulation and few others also suggest me to do simulation in fluent, so i also want to do in fluent.
but i dont know how to work on fluent completely, so i need your help in doing simulation in fluent

[NickFL]

What you describe above is a very specific example and there are likely no tutorials of similar problems. Do you already have material properties over the range of temperatures? What you have will help guide you in what you can model.

1. I would recommend doing a several simple tutorials that are in the Fluent documentation (https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/prod_page.html?pn=Fluent&pid=Fluent&lang=en) . Working through the tutorials will help you become familar with the software. We don't want the interface to be a showstopper.
2. Then I would try working on some simple problems without documentations that you can validate with hand-calcs. For example a simple Couette flow would be a basic step towards what you want to do.
3. Then slowly add one piece of the more complex modeling at a time to see how it works.  Too often students try to add all the complexity at the begining and then cannot debug the, potentially multiple, problems. Also keep the problem simple. Also keep it simple by working in 2D for as long as you can.

[Nitin Mahankali]

I've done a multiple analysis transient thermal with structural analysis. Im getting a error: "element 199 reference undefined EX of material 1" How to solve the above error

[Rob]

You may need to create a thread in the Structures room - it's not a CFD error. As a guess check the expansion coefficient of the materials. 

[Nitin Mahankali]

i've entered the elastic modulus and poissions ration then the solutions got solved

thanks