Parametric study of lotus-type pore shape in solid subject to Henry's laws at interfaces

Lee, B.Y.; Wei, P. S.

doi:10.1016/j.heliyon.2023.e18163

Cited by 2 publications

(2 citation statements)

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“…The present work constitutes a dimensionless study that is readily accessible and applicable across a wide range of applications [ 21 ]. It offers a comprehensive analysis of various dimensionless operating parameters on the shapes of lotus pores.…”

Section: Resultsmentioning

confidence: 99%

“…An increase in either the solidification rate or the imposed hydrogen gas pressure was seen to decrease both the length and maximum diameter of lotus-type pores, which can be determined from Equations (9) and (20), respectively, or the shape of the presented lotus-type pores. For a detailed prediction, refer to the table provided in a previous work applying Henry’s law in nonmetals [ 21 ]. The present work was also favorably compared with numerical predictions, which involved the proposal and resolution of experimental measurements for isolated pore formation [ 19 ], and a set of simultaneous first-order ordinary differential equations [ 23 ].…”

Section: Resultsmentioning

confidence: 99%

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Parametric Control via the Algebraic Expression of Lotus-Type Pore Shapes in Metals

Wang,

Lee,

Wei

et al. 2024

Materials

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Lotus-type porous metals, characterized by low densities, large surface areas, and directional properties, are contemporarily utilized as lightweight, catalytic, and energy-damping materials; heat sinks; etc. In this study, the effects of dimensionless working parameters on the morphology of lotus-type pores in metals during unidirectional solidification were extensively investigated via general algebraic expressions. The independent dimensionless parameters include metallurgical, transport, and geometrical parameters such as Sieverts’ law constant, a partition coefficient, the solidification rate, a mass transfer coefficient, the imposed mole fraction of a solute gas, the total pressure at the top free surface, hydrostatic pressure, a solute transport parameter, inter-pore spacing, and initial contact angle. This model accounts for transient gas pressure in the pore, affected by the solute transfer, gas, capillary, and hydrostatic pressures, and Sieverts’ laws at the bubble cap and top free surface. Solute transport across the cap accounts for solute convection at the cap and the amount of solute rejected by the solidification front into the pore. The shape of lotus-type pores can be described using a proposed fifth-degree polynomial approximation, which captures the major portions between the initial contact angle and the maximum radius at a contact angle of 90 degrees, obtained by conserving the total solute content in the system. The proposed polynomial approximation, along with its working parameters, offers profound insights into the formation and shape of lotus-type pores in metals. It systematically provides deep insights into mechanisms that may not be easily revealed with experimental studies. The prediction of a lotus-type pore shape is thus algebraically achieved in good agreement with the available experimental data and previous analytical results.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Parametric Control via the Algebraic Expression of Lotus-Type Pore Shapes in Metals

Wang,

Lee,

Wei

et al. 2024

Materials

Self Cite

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Mass transfer and reaction rate parameters for the in-situ epoxidation of tamanu oil

Budiyati,

Sofyan,

Irsyad

et al. 2024

Chem. Pap.

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The stages of the double bond epoxidation process of tamanu oil include (1) the process of making peroxyacetic acid (PAA), (2) the mass transfer of several components, and (3) the epoxidation reaction, followed by further reactions within the organic phase. This study was dedicated to the determination and estimation of reaction and mass transfer parameters in the in-situ epoxidation of tamanu oil with PAA. The reaction constant values were observed to be directly proportional to the reaction temperature, except in the case of k3. There is a slight deviation in k 3 , where it decreases from 14.6178 ± 0.0507 g.mol -1 .min -1 at 40°C to 13.6561 ± 0.0081 g.mol -1 .min -1 at 50°C. The mass transfer coefficient (kca) values increase with increasing temperature, where the kca for PAA, H2O, acetic acid (AA), and H + were 12.6654 ± 0.0657 to 23.0777 ± 0.1384, 12.3793 ± 0.0549 to 23.0790 ± 0.1476, 12.4912 ± 0.0394 to 23.0789 ± 0.0978, 12.4296 ± 0.0821 to 23.0790 ± 0.1296, respectively. Conversely, the Henry constant (H) values for each component vary. This constant is associated with the solubility of each component.

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Parametric study of lotus-type pore shape in solid subject to Henry's laws at interfaces

Cited by 2 publications

References 20 publications

Parametric Control via the Algebraic Expression of Lotus-Type Pore Shapes in Metals

Parametric Control via the Algebraic Expression of Lotus-Type Pore Shapes in Metals

Mass transfer and reaction rate parameters for the in-situ epoxidation of tamanu oil

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