For me, I used 2D heat transfer simulation by FEM code and found the G and  R along S/L interface. After then,  I drew the graph G/R with distance from meniscous and deduced the CET position comparing to criteria for CET.

Hi Rahul,

Following on from J.C. Kim's message,  please refer to Reference [1] in our paper* - relating to work by Professor John Hunt - for the seminal work on calculating CET. This depends largely on the solidification velocity (V) and the thermal gradient in the liquid (G). I think J.C. Kim uses R to signify this velocity - or rate.

Once you can calculate G and V you can apply the Hunt criterion for CET. How you calculate or estimate G and V is up to you - but you may need to use computational methods, as inferred by J.C. Kim. Our paper* provides a review of the current state of the art.

* Mirihanage, W.U., Dai, H.J., Dong, H.B., Browne, D.J., "Computational modelling of columnar to equiaxed transition in alloy solidification", Advanced Engineering Materials, 15(4), 2013, pp.216-229; doi: 10.1002/adem.201200220

Regards,

David