Numerical analysis of rapid solidification in a single roller process

Takata, Yasuyuki; Shirakawa, Hidemi; Sekiya, Hiroshi; Kuroki, Tetsuo; Ito, Teruaki

doi:10.1002/(sici)1523-149x(1999)28:1<34::aid-htj4>3.3.co;2-s

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…Research activities have not been performed on numerical simulation of the deformation of the cooling roller and its effect on amorphous ribbon formation in PFC process although few work has involved in the conjugated heat transfer between the melt and the rotating roller. 12,13) The present paper is a follow-up to our previous work 14,15) and focuses on the theoretical investigation of stresses distribution and deformation behavior of the rotating roller by a 3D elastic-plastic numerical method. It should be mentioned that the neglecting of thermal expansion in previous studies is valid for analyzing the flow and heat transfer behaviors in PFC process because in a realistic casing, a constant gap distance always is desirable by dynamically adjusting the location of the nozzle relative to the deformed roller surface.…”

Section: Thermal Deformation Analysis Of the Rotating Roller In Planamentioning

confidence: 99%

Thermal Deformation Analysis of the Rotating Roller in Planar Flow Casting Process

Liu

Chen

et al. 2010

ISIJ Int.

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Section: Thermal Deformation Analysis Of the Rotating Roller In Planamentioning

confidence: 99%

Thermal Deformation Analysis of the Rotating Roller in Planar Flow Casting Process

Liu

Chen

et al. 2010

ISIJ Int.

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“…Only few articles addressed the issue of the heat transfer in the rotating roller and its influence on the solidification characteristics. Takata et al 15) incorporated the heat transfer of the substrate into a coupled fluid/solid problem to simulate transient thermal and fluid flow and analyzed the effect of nozzle slit, nozzle width and substrate speed on cooling rate of ribbon formation without any assumption for interfacial heat transfer coefficient. But the parametric studies on the interfacial thermal behavior and temperature distribution of the roller were not presented.…”

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Parametric Investigation of Interfacial Heat Transfer and Behavior of the Melt Puddle in Planar Flow Casting Process by Numerical Simulation

Chen

Liu

2009

ISIJ Int.

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Numerical Simulation of Initial Development of Fluid Flow and Heat Transfer in Planar Flow Casting Process

Chen

Qiu

et al. 2009

Metall Mater Trans B

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This article describes the initial development of fluid flow and heat transfer in a planar flow casting (PFC) process for amorphous ribbon formation using a two-dimensional (2-D) model of fluid flow with free surface and surface tension, and heat transfer with phase transformation. The heat transfer in the rotating copper roller is incorporated into the model. A coupled fluidsolid (the puddle/roller surface) solution is employed for identifying the ideal interfacial heat transfer. The initial developments of puddle shape and flow and temperature distribution, including the air and the melt in the puddle zone, over time are presented. The time-dependent theoretical interfacial heat-transfer-coefficient and temperature profiles in the rotating roller are investigated. The effect of the varying roller speed, the PFC configurations (slit width and gap distance), and the roller parameters (roller radius and roller layer thickness) on the development of the melt flow and heat transfer in a PFC process are discussed. Numerical results show that a stable puddle shape can be formed within a very short period of time (on the order of milliseconds). The time evolution of the upstream meniscus is different from that of the downstream meniscus. The recirculation flows both in the surrounding air and in the melt of the puddle zone can be observed at a quasi-steady-state condition, but show different flow and thermal behaviors. The interfacial heat-transfer coefficient and temperature distribution of the rotating roller change with different cycles of the roller revolution until the heat-flux balance is reached. The varying parameters associated with the roller speed, slit width, gap distance, roller radius, and roller layer thickness affect the time evolution of the flow and thermal behavior in the puddle and the temperature distribution in the rotating roller.

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Numerical analysis of rapid solidification in a single roller process

Cited by 3 publications

References 1 publication

Thermal Deformation Analysis of the Rotating Roller in Planar Flow Casting Process

Thermal Deformation Analysis of the Rotating Roller in Planar Flow Casting Process

Parametric Investigation of Interfacial Heat Transfer and Behavior of the Melt Puddle in Planar Flow Casting Process by Numerical Simulation

Numerical Simulation of Initial Development of Fluid Flow and Heat Transfer in Planar Flow Casting Process

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