Three-dimensional imperfections in a model vertical Bridgman growth system for cadmium zinc telluride

Numerical modeling of melt flows in vertical Bridgman configuration affected by a rotating heat field

“…One may see that the dominant vortex follows the maximum, which agrees with the results of numerical simulations of a ''local heating source'' performed in Ref. [2]. Another result of our computation is shown at Figs.…”

Computer Modelling of Bulk Crystal Growth

“…We have studied several such extrinsic features, which we refer to as imperfections. These include tilting of the ampoule with respect to gravity, misalignment of the ampoule within the furnace, deviation of ampoule shape from cylindrical, and localized furnace heating [49]. A few of these results are presented here to demonstrate that seemingly minor imperfections can cause large nonaxisymmetric perturbations to radial segregation.…”

“…Under these circumstances it is reasonable to use an axisymmetric furnace modelled coupled to a three-dimensional model of transport phenomena within the growth vessel [44,45]. An approach that has become popular in recent years is to compute a global two-dimensional solution, the results of which are used to construct suitable thermal boundary conditions for solving a three-dimensional transport model within the growth vessel [25,[46][47][48][49].…”

Influence of a Melt Flow on Generation of Functionally Graded Structure in Bulk Polymeric Materials under Uniaxial Thermal Gradient

“…[31][32][33][34][35][36] The convection, in contrast, becomes nonsymmetric if the ampoule slightly tilts. [35,36] Indeed, a perfect matching of these two directions is impossible in our system, resulting in the generation of the nonsymmetric convection.…”