Effect of buoyancy and Marangoni forces on the dopant distribution in a single crystal fiber grown from the melt by edge-defined film-fed growth (EFG) method

The computations are carried out in the stationary case, for different Grashof and Marangoni numbers corresponding to the heat expansion coefficients and surface tension temperature coefficients situated in ranges centered around the literature values: β∈[1.8×10−6, 1.8×10−4] K−1; dγ/dT∈[−3.5×10−4, −3.5×10−6] N m−1 K−1 for Nd:YAG, and β∈[1×10−5, 1×10−3] K−1; dγ/dT∈[3×10−5, 3×10−3] N m−1 K−1 for Nd:LiNbO3. The combined effect of the buoyancy and Marangoni forces on the fluid flow and on the dopant distribution is analyzed.