A numerical analysis of heat transfer in a set-up for growing BGO crystals is undertaken. Consideration is given to the correct treatment of radiative heat transport inside and outside the crystal. Effect of internal radiation is demonstrated. Conjugate heat transfer in crystal, melt and crucible was studied for different crystal lengths. Violation of the fully faceted growth at the initial stage of pulling is discussed. (C) 2002 Elsevier Science B.V. All rights reserved.