Numerical and experimental investigation of the spray quenching process with an Euler-Eulerian multi-fluid model

Edelbauer, Wilfried; Zhang, D.; Kopun, Rok; Stauder, Bernhard

doi:10.1016/j.applthermaleng.2016.02.131

Cited by 13 publications

(7 citation statements)

References 31 publications

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“…This brings to conclusion that implemented droplet/wall heat transfer model is maybe able to reproduce heat transfer of single droplet, but is unable to cope with effects of pronounced wall wetting, even in the case of fairly dilute spray produced by air assisted atomizer. Also, current model is not able to reproduce change from transition boiling regime to nucleate boiling regime, which is Although correlation of Wendelstorf et al [29] has been already implemented in the work of Edelbauer et al [28], this has been realized in the framework of Eulerian multiphase approach. Present work includes adjustment of correlation for the purposes of Lagrangian spray approach which is still prevailing in industrial applications.…”

Section: Quenching Simulationmentioning

confidence: 94%

“…The CFD is today being employed for numerical modelling of various physical processes with pronounced practical significance, for example: heat transfer of a turbulent jet impinging on a moving plate [22], numerical investigation of film cooling [23], use of autoignition tabulation for complex chemistry combustion mechanisms [24], design of top combustion hot blast stove [25], influence of biofuel addition to diesel fuel [26] and numerical analysis of cement calciner [27]. Regarding spray cooling, one of rare numeric studies was presented in [28] where authors implemented correlation of Wendelstorf et al [29] for heat transfer coefficient as a part of enhanced Euler-Eulerian model for the simulation of spray quenching process. It provided solid basis for numerical implementation because it encompasses wide range of experimental conditions and is only depended upon two parameters, namely impingement density and temperature difference between wall and spray droplets.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of the transient spray cooling process for quenching applications

Baleta

Živić

et al. 2018

Therm sci

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Water spray quenching distinguished itself as a promising method for industry production, especially for the parts which require good mechanical strength while simultaneously retaining the initial toughness. Studies have shown that the heat transfer process during the spray quenching is mostly influenced by the spray impingement density, particle velocities and sizes. The application of advanced numerical methods still plays insufficient role in the development of the production process, in spite of the fact that industry today is facing major challenges that can be met only by development of new and more efficient systems using advanced tools for product development, one of which is CFD. Taking the above stated, the object of this research is numerical simulation of spray quenching process in order to determine validity of mathematical models implemented within the commercial CFD code Fire, especially droplet evaporation/condensation and droplet-wall heat transfer model. After review of the relevant literature suitable benchmark case was selected and simulated by employing discrete droplet method for the spray treatment and Eulerian approach for the gas phase description. Simulation results indicated that existing droplet/wall heat transfer model is not able to reproduce heat transfer of dense water spray. Thus, Lagrangian spray model was improved by implementing experimental correlation for heat transfer coefficient during spray quenching. Finally, verification of the implemented model was assessed based on the conducted simulations and recommendations for further improvements were given.

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Section: Quenching Simulationmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the transient spray cooling process for quenching applications

Baleta

Živić

et al. 2018

Therm sci

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“…11 (a). Cooling for 6 s after heating was simulated with reference to the heat transfer coefficient of water spray by Edelbauer et al [16]. The maximum temperature was 201 ℃ (Fig.…”

Section: Simulations Of the High-frequency Induction Hardening Processmentioning

confidence: 99%

High-Frequency Heat Treatment of AISI 1045 Specimens and Current Calculations of the Induction Heating Coil Using Metal Phase Transformation Simulations

Choi¹,

Lee²

2020

Preprint

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Based on electromagnetic heat transfer and metal phase transformation co-simulations, we modeled an AISI 1045 specimen under high-frequency heat treatment. Hardening zone predictions were confirmed through cooling and metal phase transformation simulations after obtaining the results from electromagnetic heat transfer simulations. The cooling process was modeled by applying the cooling coefficient of the cooling water in the same way as the actual heat-treatment process. To obtain the current flowing through the coil during high-frequency induction heating, the voltage was measured and applied using the resistance–inductance–capacitance circuit calculation method. Experimental and simulated results of the heating temperature and curing depth of an AISI 1045 specimen with a carbon content of 0.45% were compared; the comparison indicated good agreement between the two. Using the simulation results, we established a method for obtaining the current flowing through the induction coil for predicting the extent and depth of the hardening zone during high-frequency induction heat treatment.

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“…[31] This model has been successfully applied in numerical models for quenching applications. [32,33] In the model of Yao and Cox, [30] the heat transfer efficiency for water spray was expressed as the ratio of the heat transfer rate to the theoretically maximal heat transfer rate…”

Section: Materials Properties and Boundary Conditionsmentioning

confidence: 99%

“…[ 31 ] This model has been successfully applied in numerical models for quenching applications. [ 32,33 ] In the model of Yao and Cox, [ 30 ] the heat transfer efficiency for water spray was expressed as the ratio of the heat transfer rate to the theoretically maximal heat transfer rate

q^{″} = ϵ [G (Δ h_{lg} + c_{p,l} (T_{sat} - T_{normall}) + c_{p,v} (T_{0} - T_{sat}))]

ϵ = 8 \times 10^{- 7} {(\frac{{We}_{s} T_{sat}}{normalΔ T})}^{- 0.62} + 3.5 \times 10^{- 3} {(\frac{{We}_{s} T_{sat}}{normalΔ T})}^{- 0.2}

where

Δ h_{lg}

is the latent heat of vaporization,

c_{p,l}

is the specific heat capacity of water,

T_{sat}

is the saturation temperature of water (boiling point),

c_{p,v}

is the specific heat capacity of water vapor, and

{We}_{normals}

is the modified Weber number, which is defined as follows

{We}_{normals} = \frac{G^{2} d}{ρ_{normall} σ_{normall}}

where d is the water droplet diameter and σ 1 is the surface tension of water. The model of Yao and Cox [ 30 ] (Equation (9)) is valid for T surf = 300–800 °C and G = 0–50.5 kg m −2 s −1 .…”

Section: Description Of the Modelmentioning

confidence: 99%

Numerical Modeling of Argon‐Oxygen Decarburization Slag Cooling

Kärnä

Visuri

Heikkinen

et al. 2020

steel research int.

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Stainless steelmaking produces different types of slags which need to be cooled, stored, and pretreated before further use. In current practice, the slag is cooled in an air atmosphere, but water cooling has been envisaged to speed up cooling. The aim of this article is to simulate the cooling of argon‐oxygen decarburization (AOD) slag under the conditions of ambient cooling and water cooling. The effects of the thickness and initial temperature of the slag layer are also studied. Finally, practical means to improve the cooling practice are evaluated based on the model predictions.

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Numerical and experimental investigation of the spray quenching process with an Euler-Eulerian multi-fluid model

Cited by 13 publications

References 31 publications

Numerical investigation of the transient spray cooling process for quenching applications

Numerical investigation of the transient spray cooling process for quenching applications

High-Frequency Heat Treatment of AISI 1045 Specimens and Current Calculations of the Induction Heating Coil Using Metal Phase Transformation Simulations

Numerical Modeling of Argon‐Oxygen Decarburization Slag Cooling

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