The sand grain dissolution pathlines

Jiri Novak

Hello,

I have a hard one comming from the glass industry background. I try to simulate the sand grain dissolution in the glass melt by means of UDS.

PROBLEM DESCRIPTION: In practis, the rough glass melt is full of small size undesirable sand grain particles which come from raw materials and must be dissolved in time before the glass melt exits the furnace for consequent manufacturing. The grains don't affect the flow patern in the furnace but rapidly change the quality of final glass. Therefore it's not neccessary to calculate this exactly as a multiphase flow but by means of user defined scalars. I have an idea of following steps:

1) simulate the one phase steady flow of the glass melt in the furnace

2) consequently solve extra unsteady UDS transport equation simulating the distribution of inhomogeneity grains. The grains would be set virtualy into the entire space of the glass melt (UDF) and would copy the flow pattern and change the diameter (scalar variable) according function of time and temperature.

Can anyone confirm the legitimacy of this aproach?

The aim is to design the model of glass melt quality with respect to the initial sand grain size (common raw material) and melting conditions (temperature and velocity field).

Regards, Jiri