Experimental and numerical studies on temperature and flow fields in crystal growth from phosphoric acid solutions

• Published in: Journal of crystal growth Vol. 249; no. 1; pp. 345 - 353
• Main Authors: Barz, R.-U., Grassl, M.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.02.2003; Elsevier
• Subjects: A1. Computer simulation; A1. Convection; A1. Fluid flows; A1. Heat transfer; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Growth from solutions; Materials science; Methods of crystal growth; physics of crystal growth; Physics; Theory and models of crystal growth; physics of crystal growth, crystal morphology and orientation; A1. Heat transfer; 44.25; 07.05.T; A1. Convection; A1. Fluid flows; 47.15; A1. Computer simulation; Phosphates; Temperature dependence; Phosphoric acid; Al. Convection; Inorganic compounds; Digital simulation; Fluid flow; Theoretical study; Al. Heat transfer; Flow pattern; Gallium phosphates; Computerized simulation; Experimental study; Al. Computer simulation; Convection; Acidic solution; Hydrothermal synthesis; Al. Fluid flows; Aluminium phosphates; Crystal growth from solutions; Heat transfer
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/S0022-0248(02)02111-5

Axial temperature gradients in phosphoric acid solutions under hydrothermal conditions have been measured, which occur due to different directions of the heat flux gradient forced upon the system. The results were analysed and interpretated by means of numerical modelling the heat transfer and the flow field. Additionally, forced convection was considered by calculating the influence of a rotating solid body (crystal) inside the calculation domain. The results are discussed with respect to their consequences on crystal growth of AlPO 4 and GaPO 4 if the temperature gradient method is to be utilized.