A strategy of stretching melt to a thin layer: Self-controlled “stretching melt-pancakes” to enhance heat transfer and mixing during polymer extrusion

Jian, Ranran; Dai, Rui; Sain, Mohini; He, Yan

doi:10.1016/j.applthermaleng.2023.120090

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…Jian et al [12] proposed a novel "flipping meltpancakes" screw structure by designing torsional flow pattern to enhance molecular and thermal mobility between the top area and the bottom area in the radial of screw channel, and results indicated that effective transfer of local heat occurred to achieve uniform thermal distribution. Afterwards, Jian et al [13] proposed yet another novel "stretching melt-pancakes" screw structure to generate elongational flow and compared it with traditional screw and "flipping melt-pancakes" structures. The elongation deformation caused by the converging wedge-shaped channel of the "stretching melt-pancakes" screw structure can enhance radial mass and heat transfer, achieving effective mixing of local heat and particles.…”

Section: Introductionmentioning

confidence: 99%

Polymeric field synergy principle: Revealing the intrinsic mechanism of screw channel optimization to enhance thermal management and process efficiency

Pan,

Huang,

Zhu

et al. 2024

Clean Energy Sci. Technol.

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The process efficiency and energy efficiency of extrusion equipment emerge as pivotal challenges constraining the development of the polymer extrusion industry. This article presents a new principle of polymeric field synergy to guide the solution to the low mixing efficiency and energy utilization efficiency of traditional extrusion equipment. Finite element analysis was conducted on four novel unconventional screw configurations and compared with the traditional single-thread screw. Results revealed that more complicated melt flow patterns generated in the modified novel screw configurations enhanced the stretching deformation or helical flow. The stretching or helical flows to varying degrees during the melt extrusion process thereby improved the mixing and heat transport efficiency. Among them, helical flow induced by the Maddock element exhibited the most significant impact on stretching flow and ductile deformation in the flow field. Simultaneously, the helical flow caused radial motion of the internal material, significantly promoting the synergy between the velocity field, velocity gradient field, and temperature gradient field. This enhanced radial heat and mass transport efficiency within the screw channel, subsequently improving the overall operational efficiency of the equipment. The results of the finite element analysis have substantiated the scientific validity of the polymeric field synergy principle.

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Section: Introductionmentioning

confidence: 99%