Phasefield Modelling

Code development

The aspects currently being looked at are :

• Use of CALPHAD approach to use realistic thermodynamic data
• Effective computation using parallel processing and GPU computing using OpenCL.

The work forms part of doctoral thesis of P. Gerald Tennyson. Several models have been implemented over last few years by students as described below.

Abhik N. Choudhury implemented most of the eutectic models available in the literature as part of his work for his Dual Degree project.

B.G. Chirranjeevi implemented anisotropic free dendrite growth model and extended it to 3D solidification.

Aravind Krishnamurty implemented a phase field model based on using the orientation as an order parameters for 2D simulation of solidification into polycrystalline microstructures.

Sanket implemented a dry snow metamorphosis model to simulate microstructures of snow formation using a phase field model.

Suryanaman implemented the non-linear stability analysis of solidification to see the effect of amplitude of perturbation on the stability using Mathematica®. He also implemented asymptotic analysis in Mathematica® to retrieve Stefan’s condition and Gibbs-Thomson condition from diffuse interface models.

References

Please note that soft copies of publications are subject to copyright of the respective publishers.

• MPI + OpenCL implementation of a phase-field method incorporating CALPHAD description of Gibbs energies on heterogeneous computing platforms
  P. Gerald Tennyson, G. M. Karthik, G. Phanikumar
  Computer Physics Communications, pp. 48-64, vol. 186 (2015)
  DOI
• Computational modelling of dendritic to globular transition using an isothermal binary phase-field model
  P. Gerald Tennyson and G. Phanikumar
  Transactions of Indian Institute of Metals, Vol. 64, No.1-2, pp. 251-254, (2011)
  URL
• Experimental studies and phase field modeling of microstructure evolution during solidification with electromagnetic stirring
  P. Gerald Tennyson, P. Kumar, H. Lakshmi, G. Phanikumar, P. Dutta
  Transactions of the Non-ferrous Metals Society of China, vol. 20, supplement 3, pp. s774-s780 (2010)
  DOI

Using MICRESS

We have also used MICRESS - The Microstructure Evolution Simulation Software from Access e.V., Aachen, Germany. This software is coupled with Thermo-Calc databases to simulate segregation in technical alloys.

References

Rahul’s HEA papers get listed here.