Learning Forum

[Mohamed HASSAN]

Hi,

I am interested in simulating the transient temperature field of the melt pool and the heat-affected zone during the LPBF and DED. 
Which Ansys Modules is suited for this?
Is there any material to start with?

Thanks, 
Mohamed

[Ashish Khemka]

Hi,

Please see if the following link helps:

Prediction and validation of melt pool dimensions and geometric distortions of additively manufactured AlSi10Mg | SpringerLink

Regards,

Ashish Khemka

[Mohamed HASSAN]

Dear Ashish,

Thank you for your prompt response and for providing the reference to the paper on predicting and validating melt pool dimensions in additively manufactured AlSi10Mg. I have reviewed the paper, and while the FE thermomechanical model using Abaqus is certainly insightful, it appears that their approach is focused on the thermal analysis of a meso-scale model without taking into account fluid dynamics, right?

I am particularly interested in simulating the transient temperature field of the melt pool and the heat-affected zone in LPBF and DED processes using computational fluid dynamics. I believe considering phenomena such as Marangoni flow, capillary flow, recoil pressure, and melt pool turbulence, as well as modeling two-phase flow, phase change, and the volume of fluid (VOF) method can significantly enhance the accuracy of our simulation results, right?

To this end, I would like to inquire about Ansys modules specifically designed for CFD simulations of additive manufacturing processes, including modules that can handle complex multiphysics interactions such as fluid-structure interactions, heat transfer, and phase changes. Furthermore, I would appreciate any learning materials or tutorials that could help me get started with these Ansys modules.

Looking forward to your guidance on this matter.

Best regards, Mohamed

 

[Ashish Khemka]

Hi Mohamed,

 

Thanks for the update. I will ask CFD members to look into this and may be forum members with expertise in CFD can comment more on this.

 

Regards,

Ashish Khemka

[SRP]

Hi,

In ANSYS Fluent, multiphase model that best represents the process. For DED, the Eulerian-Lagrangian multiphase model is commonly used. This model solves the equations for the fluid phase (powder) and the particle phase (melt pool) separately. For LPEF, the Eulerian-Eulerian or Eulerian-Lagrangian multiphase model is commonly used. This model solves the equations for the fluid phase (powder) and the gas phase (shielding gas or atmosphere) separately.

To start, I recommed you to please go through tutorial: Chapter 23: Using the Eulerian Multiphase Model (ansys.com)

If you are not able to access the link, please refer to this forum discussion: https://forum.ansys.com/forums/topic/using-help-with-links/#latest

Thank you.