Solidification melting problem
 

Hello
I have problem with divergence with solidification melting model. After reaching temperarure of 1380 C (melting ) my simulation stops with floating error (AMG solver temperature error). On post processing if i plot temperatures on this fluid domain i have non physical values of temperatures for example 4000 C.
Problem description
1) first fluid domain -stationary with heating area 1520 C and with cooling area with 50 C .
2) second fluid domain with sliding mesh option (transitional 6mm/min) inside this domain i have fluid domain (solidification melting model of steel) with ceramic shell (solid domain).
This is transient simulation with
Energy / Radiation Discrete Ordinates /Viscous Sst
I try to simulate Bridgeman Method .

Fluid domain with solidification melting model going down from heating zone with starting temp 1520 C to cooling zone . After reaching 1380C i have this error.

Looking for help
Best regards