Modeling of the Transient Temperature Field during Laser Heating

Elsheikh, Ammar H.; Shanmugan, S.; Muthuramalingam, T.; Kumar, Ravinder; Essa, Fadl A.; Ibrahim, Ahmed Mohamed Mahmoud

doi:10.1007/s40516-021-00138-2

Cited by 28 publications

(2 citation statements)

References 43 publications

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“…[8,9,[11][12][13][14][15][16] In comparison, numerical simulation is a crucial tool for obtaining a deeper and more indirect understanding of the distribution of multiphysical fields. [19][20][21][22][23][24][25] Until now, only an extremely limited number of numerical models have been developed to study the multiphysical field during the FST process, [17,18,[26][27][28][29] and these models have been used to investigate the effects of strip feeding speed, [17,18,[26][27][28][29] strip size, [18] and molten steel superheat [18] on the temperature reduction after feeding strip during continuous casting process. However, there are a lack of numerical models that consider strip oscillation during the feeding process to investigate the effect of oscillation on cooling capacity of strip in continuous casting.…”

Section: Introductionmentioning

confidence: 99%

Cooling Capacity Evolution of Steel Strip during Oscillatory Feeding Process in Slab Continuous Casting

Zhang

Zhu

et al. 2023

steel research int.

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To comprehensively understand the effect of oscillation on cooling capacity of steel strip, a mathematical model is proposed to investigate the distribution of temperature fields in continuous cast slabs, taking into account the oscillatory feeding process. Strip oscillation results in a periodic variation of nearby molten steel flow. It intensifies the turbulence of surrounding molten steel and enhances the interfacial heat transfer. During the feeding process, the morphology of strip undergoes three stages: upheaval, fluctuation, and disappearance. As the strip oscillation frequency increases, the maximum cross‐sectional area of the strip gradually decreases during the upheaval stage, the fluctuation stage gradually disappears, and the strip disappearance speed gradually increases during the disappearance stage. These observations suggest that an increase in the oscillation frequency accelerates the melting of the strip, which is caused by the enhanced heat transfer between the strip and molten steel. This results in a gradual growth of strip's cooling capacity and a decrement in the liquid fraction of molten steel surrounding the strip. In addition, feeding strip is advantageous in preventing the jet from impinging onto narrow surfaces of slab. The blocking effect initially increases and then remains almost unchanged as the strip oscillation frequency increases.

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Section: Introductionmentioning

confidence: 99%

Cooling Capacity Evolution of Steel Strip during Oscillatory Feeding Process in Slab Continuous Casting

Zhang

Zhu

et al. 2023

steel research int.

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“…The results show that as the laser power increases, the cutting speed decreases, the surface roughness worsens, and the heat-affected zone widens. Ammar H. Elsheikh [20] proposed a solution to address the margin problem in order to accurately calculate the transient temperature field during laser heating. The experiments were conducted using a continuous-wave CO 2 laser with a maximum power of 150 W to validate the findings.…”

Section: Introductionmentioning

confidence: 99%

The Relevance of Process Parameter Optimization and Geometric Figure for Direct Laser Deposition of Inconel 738 Alloy and Its Theoretical Modeling

Qi,

Wu,

Chen

et al. 2023

Coatings

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In order to minimize the gaps between the direct laser deposition channels and improve the quality and performance of the formed parts, the process of direct laser deposition is utilized in laser additive manufacturing to create sequential, single- and double-channel deposition layers on 304 stainless steel plates. Under the premise of keeping the layer rate and defocusing amount unchanged, this study investigates the effects of laser power, scanning speed, and powder feeding rate on the morphology and inclusions of single- and double-channel deposited layers. The aim is to determine the optimal process parameter values for direct laser deposition of single-layer, single-channel Inconel 738. The effects of the three process parameters on the response values were investigated using a multi-factor, multi-level experimental design. The evaluation indexes for the analysis included the deposited layer wetting angle and aspect ratio. The analysis involved one-way extreme analysis and ANOVA analysis. The optimal process parameters are a laser power of 550~750 W, a scanning speed of 7~13 mm/s, and the powder feeding rate was 2.1~4.33 g/min. At the same time, the relationship between surface tension and gravity was integrated with the spherical coronal model and Young’s equation to develop a mathematical model of the direct laser deposition process at a theoretical level. The mathematical model of the direct laser deposition process was utilized to analyze the correlation between the geometric parameters of the cross-section of the deposited layer. This analysis provides a valuable data reference for future Inconel 738 direct laser deposition.

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Heat transfer enhancement in double pipe heat exchanger: exploring twisted tape inserts with dimple configuration

Heeraman,

Sandeep,

Chaurasiya

2024

J Therm Anal Calorim

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Modeling of the Transient Temperature Field during Laser Heating

Cited by 28 publications

References 43 publications

Cooling Capacity Evolution of Steel Strip during Oscillatory Feeding Process in Slab Continuous Casting

Cooling Capacity Evolution of Steel Strip during Oscillatory Feeding Process in Slab Continuous Casting

The Relevance of Process Parameter Optimization and Geometric Figure for Direct Laser Deposition of Inconel 738 Alloy and Its Theoretical Modeling

Heat transfer enhancement in double pipe heat exchanger: exploring twisted tape inserts with dimple configuration

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