How to set the viscosity of the solid material during the process of solid-liquid phase

Hello,

I major in heat storagy of PCM melting process ( solid to liquid phase ). And I have a problem in my field.

Do I need to set the viscosity of the solid material as large as 1e8 Pa*s or just as the same as liquid phase

( 0.024 Pa*s ) ?

But in the sample of CONTINUOUS CASTING, the viscosity of solid Alloy is the same as the liquid one.

Any tips and help will be great. Could you give me a hand ?

Best wishes to you!

My e-mail: howie572502967@163.com