Tip-splitting instability in directional solidification based on bias field method
You Jia-Xue, Wang Zhi-Jun, Li Jun-Jie, Wang Jin-Cheng†
       
Cellular shapes from flatter region to tip region with different shape factors α . For the convenience of description of Fig.  2 , we define the tip region as 0 ≥ μ ≥ −0.1 and the flatter region as −0.1≥ μ ≥ −1.