Physical Simulation of Bubble Movement in Ascending Section of Platinum Channel for Electronic Display Glass

doi:10.16552/j.cnki.issn1001-1625.2025.0763

Abstract

Abstract:

Platinum channel is one of the most critical pieces of equipment in the production of electronic display glass. This paper studied the influence of inclination angle changes in ascending section of platinum channel structure on movement behavior of bubbles in molten glass. A physical simulation experimental platform with a model-actual geometric ratio of 1∶4 was constructed through structural and dimensional design. Polydimethylsiloxane was used as the simulated liquid， combined with similarity criteria （Reynolds number， Galileo number）， the movement characteristics and distribution laws of bubbles were systematically analyzed under three inclination angles of the ascending section of platinum channel： 23°， 30°， and 45°. The results show that the measured kinematic viscosity of the simulated liquid has good similarity with the theoretically calculated kinematic viscosity. Changes in the inclination angle of ascending section of platinum channel have a significant impact on the flow of molten glass and the movement of bubbles. When the inclination angle of ascending section of platinum channel changes from 23° to 45°， the bubbles at its outlet are more concentrated in upper part of the pipe cross-section， and the lifting effect on bubbles is obvious. After comprehensive analysis， it is found that the effect of a 30° inclination angle is optimal.Within the scope of this study， an increase in the inclination angle of ascending section of platinum channel strengthens the synergistic effect between bubble buoyancy and fluid dynamics.

Key words: electronic display glass, platinum channel, ascending section, physical simulation, bubble movement

CLC Number:

TQ171.6

HE Feng, ZHI Jiayao, ZHAO Zhilong, ZHANG Kejian, XIE Junlin, ZHAO Zhiyong, TIAN Yingliang. Physical Simulation of Bubble Movement in Ascending Section of Platinum Channel for Electronic Display Glass[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(1): 275-287.

Figures/Tables 13

Fig.1 Full viscosity curve of glass in actual production

Fig.2 Temperature-kinematic viscosity curve of 1 590~1 650 ℃

Fig.3 Theoretical temperature-kinematic viscosity

Fig.4 Actually measured temperature-kinematic curve of simulated liquid viscosity curve of simulated liquid

Fig.5 Comparison between theoretical values and actually measured kinematic viscosity values of simulated liquid

Fig.6 Experimental platform of physical simulation

Fig.7 Bubble size distribution in simulated liquid at inlet of simulative ascending section of platinum channel

Fig.8 Schematic diagram of rising trajectories of bubbles with different diameters

Fig.9 Physical photograph and schematic diagram of overall bubble distribution trend in 23° simulative ascending section of platinum channel

Fig.10 Physical photograph and schematic diagram of overall distribution trend of bubbles in 30° simulative ascending section of platinum channel

Fig.11 Physical photograph and schematic diagram of overall distribution trend of bubbles in 45° simulative ascending section of platinum channel

Fig.12 Liquid flow morphology in 30° simulative ascending section of platinum channel

Fig.13 Schematic diagram of steady-state equilibrium of bubble movement in inclined pipe

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