Solidification for Gr=1e6 or 1e7
 

Hi all,
can any one please tell me how to simulate the 2-d solidifiction in a cavity for Gr=1e6/1e7. for Gr=1e3-1e5 is simple and can easily be done but for more Gr number like 1e6, the temperature differenece is quite a lot. Kindly tell me what temperature values do we need to put for this problem.Thanks
Ravi