The quality specifications for products such as wire rods produced by the steel industry are becoming ever more demanding. This demand has led to achieve uniform product quality at high production speeds. As a result, there is a need for the systems that operate in real time and continuously measure cross-section profile of the rods and detect if any change or deviation from the desired behaviour in their cross-section. To reach this goal, a laser-based computer-controlled technology provides a useful solution. In this paper, a high speed, low cost and high accuracy non-contact laser-based measuring system has been proposed and developed using a STM32 microcontroller. The system can measure the thickness of solid, non-transparent wire rods using the linear charged-coupled sensor and sent to a microcontroller unit to further analyse and continuously display the cross-sectional profile in real time. Any deviation in the dimension over the length of the wire along with its position with respect to starting of the wire can be detected in real time. The designed and developed system has capability of measurement accuracies and respectabilities to the micrometre level.
The field of rotating packed bed (RPB) and its applications in the transfer processes are multidisciplinary in nature. Achievement of significant volume reduction by employing the RPB in distillation towers has been fairly established in the mass transfer domain. Nevertheless, the prospect of RPB in the heat transfer domain still remains dormant. The current work addresses this very issue by exploring the characteristics of thermal transactions across the novel RPB device. This study succinctly presents the related aspects with multi-phase flow of participating fluids in the counter-current direction across the porous, rotating packed bed structure. However, the simultaneous involvement of these multivariate intrinsic attributes makes the understanding of the transfer phenomenon quite complex upon viewing from the experimental perspective alone. Hence, computational fluid dynamics (CFD) tool has been used for assimilation of the physical understanding of the thermal transactions along with the effects of operating parameters. The thermal contours, main effect and surface plots for heat transfer rate directly contribute towards better appreciation of the thermal transaction mechanism and could be employed for suitable volume reduction in heat exchanger devices.
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