Numerical modeling of diffusive-convective physical vapor transport in cylindrical vertical ampoules

Effects of convection on physical vapor transport of Hg2Cl2 in the presence of Kr - Part I: under microgravity environments

“…As depicted in Fig. 2, similar to the earlier results of Markham, Greenwell and Rosenberger [2], one sees that the convective flow can cause significant non-uniformities in the total molar flux, with the specific distribution revealing dominance of solutal convection. Even though not shown here, the single convection cell flows towards the growing interface in the lower half of the growth ampoule, thus better supplying this part of the interface with vapor supersaturated in component A.…”

“…Even though not shown here, the single convection cell flows towards the growing interface in the lower half of the growth ampoule, thus better supplying this part of the interface with vapor supersaturated in component A. Note that if there is thermal convection alone, with the left part of the ampoule warmer than the right part, an oppositely rotating roll would appear and, thus, result in enhancing the growth of crystal in the upper half of the interface [2]. As shown in Fig.…”

“…Until now many theoretical studies and quantitative experiments on transport phenomena in PVT have been extensively investigated. Most important theoretical works were achieved by Rosenberger et al [1][2][3][4][5][6] and, recently extended for transition to chaos flow fields in specialty materials of mercurous chloride in applications of microgravity experiments by Duval [7][8][9][10][11][12]. They have addressed the underlying phenomena in the PVT processes on the relative importance and influencing parameters of diffusion-advection, thermal and/or solutal convection on mass transport.…”

Effects of Solutally Dominant Convection on Physical Vapor Transport for a Mixture of Hg2Br2and Br2under Microgravity Environments

“…The physical and mathematical formulations and many assumptions could be found in Refs. [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. For simplicity, detailed assumptions used in this analysis are not described here.…”

Importance of convection during physical vapor transport of Hg2Cl2in the presence of Kr under environments of high gravitational accelerations

“…Until now many theoretical studies and quantitative experiments on transport phenomena in PVT have been extensively investigated. Most important theoretical works were achieved by Rosenberger et al [1][2][3][4][5][6] and, recently extended for transition to chaos flow fields in specialty materials of mercurous chloride in applications of microgravity experiments by Duval [7][8][9][10][11][12]. They have addressed the underlying phenomena in the PVT processes on the relative importance and influencing parameters of diffusion-advection, thermal and/or solutal convection on mass transport.…”