Piecewise linear interface-capturing volume-of-fluid method in axisymmetric cylindrical coordinates

Bureš, Lubomír; Sato, Yohei; Pautz, Andreas

doi:10.1016/j.jcp.2021.110291

Cited by 10 publications

(15 citation statements)

References 56 publications

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“…In the present context, all the governing equations are solved in a two-dimensional (2-D), axisymmetric cylindrical geometry, though a full 3-D option is available in the code. The verification and validation for two-phase flows with and without phase change are reported in Bureš et al (2021) and Bureš & Sato (2021b), and they are not repeated in this paper.…”

Section: Governing Equationsmentioning

confidence: 99%

“…To this end, the governing equations for incompressible flows with phase change are solved, including phase, momentum, mass and energy exchanges. The solution algorithm is described in detail by Bureš et al (2021) and Bureš & Sato (2021b). Below, a brief summary is given, special attention being paid to the numerical treatment of the solid substrate in nucleate boiling, a topic not covered in our previous papers.…”

Section: Governing Equationsmentioning

confidence: 99%

“…(i) Perform the GVOF reconstruction of the interfacial geometry in wall-adjacent cells, utilising only information in the fluid cells themselves. Here, GVOF reconstruction means computing normal vectors and line constants defining the GVOF interfacial orientation based on the φ stencil described in Bureš et al (2021). (ii) Extend the linear interface from wall-adjacent cells to the ghost cells to obtain φ ghost .…”

Section: Ghost Cellsmentioning

confidence: 99%

“…(The code is available at https://github.com/PSI-NES-LSM-CFD/PSI-Boil.) We have introduced the axisymmetric cylindrical geometric volume-of-fluid (GVOF) method for interface tracking (Bureš, Sato & Pautz 2021), and coupled it with the existing sharp-interface heat-and mass-transfer model within PSI-BOIL, and with the phasic velocity extrapolation algorithm of Malan et al (2021), but with several modifications (Bureš & Sato 2021b). As reference data for validation, we have acquired comprehensive measurements of first-bubble growth in a microlayer evaporation regime taken at the Massachusetts Institute of Technology by Bucci (2020), partially presented in Bucci, Buongiorno & Bucci (2021).…”

Section: Introductionmentioning

confidence: 99%

“…(The code is available at .) We have introduced the axisymmetric cylindrical geometric volume-of-fluid (GVOF) method for interface tracking (Bureš, Sato & Pautz 2021), and coupled it with the existing sharp-interface heat- and mass-transfer model within PSI-BOIL , and with the phasic velocity extrapolation algorithm of Malan et al. (2021), but with several modifications (Bureš & Sato 2021 b ).…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive simulations of boiling with a resolved microlayer: validation and sensitivity study

Bureš

Sato

2022

J. Fluid Mech.

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The dynamics of the microlayer beneath a growing bubble in nucleate boiling significantly impacts the heat-transfer characteristics of the process. The minute thickness of the microlayer motivates the use of direct numerical simulation (DNS) to model its behaviour if empirical models are to be avoided. In this work, we develop a computational strategy for utilising DNS to model nucleate boiling by resolving explicitly the microlayer, directly coupling, in a stable manner, the mass, momentum and energy conservation equations with the conjugate heat transfer between the solid and fluid domains. To this end, closure models for the treatment of interfacial heat transfer and the dynamic contact angle are introduced and substantiated. The computational procedure is validated against relevant experimental data recently measured at the Massachusetts Institute of Technology; it is shown that the main observed growth features and surface heat-transfer characteristics are well reproduced using our model. We go on to perform a sensitivity study of the dependence of the initial microlayer thickness distribution on the applied superheat and fluid properties. The results indicate that an equation derived from lubrication theory captures the observed trends well. Finally, a first demonstration of DNS of boiling with an explicitly resolved microlayer in three-dimensional Cartesian coordinates is presented in one of the appendices.

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Section: Governing Equationsmentioning

confidence: 99%

Section: Governing Equationsmentioning

confidence: 99%

Section: Ghost Cellsmentioning

confidence: 99%