Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Simulation software for molten fiber flow

Simulation software for molten fiber flow

Simulation software for molten fiber flow

I am looking for the best software for the molten fiber flow process simulation (e.g. Ansys-Polyflow, CFD, …). I would be grateful for any suggestions.

I would like to simulate the process taking place inside the spray head as well as under it (possibly also turbulence).

I attach to this post a simple sketch presenting the scenario for the simulation. Please also find below more detailed description of the simulation case.
1. Application- melt-blown non-woven polypropylene fiber applied on a table. This process creates a layer of the blown material.
2. Geometry- please refer to the sketch sent attached. The sketch presents the cross-section of the tooling (so called spray head) which consists of the three major parts: the two side metal strips (over 1 meter long each) and one centre metal strip (also over 1 meter long, with a milled narrow deep slot and an array of hundreds of small holes - 0.3mm o.d. each, 0.5mm hole pitch).
3. Boundary conditions- as presented in attached drawing and described below.
4. Material data- polypropylene (PP) homopolymer (intended for fibre appliation). Molecular weight distribution - narrow.
5. Viscosity- varies with the polypropylene temperature drop which takes place in the process described in the attached sketch.
6. Objective-
-Step 1- Create simulation of the process taking place inside spray head and just below it (see attached drawing). The spray head geometry will be limited to the short section length involving only one 0.3mm hole and the overall length of 0.5mm (instead of simulating full length spray head with all its holes).
- Step 2- Validate the model created in step 1. Model validation basis has not been determined yet.
- Step 3- Optimise the process taking place inside and outside (below) spray head, through its design change and process parameters modification (such as molten fibre pressure or temperature) to: stabilize process, increase efficiency, etc.
It is also possible that in some stage the 'simulated' spray head geometry can be extended to two or more 0.3mm holes (e.g. for the turbulence simulation which takes place under the spray head).

I intend to use Polyflow/Fluent provided by Ansys. However, when I do reading of the available literature I learn that a lot of researchers, in the area of molten fiber flow, use CFD software (Gambit and Fluent).
Please help and send your opinions.
Thank you.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close