Three-Dimensional Simulations of Nucleate Boiling With Sharp Interface Volume of Fluid and Localized Adaptive Mesh Refinement in <sc>ansys</sc>-<sc>fluent</sc>

被引:3
作者
James III, Winston O. [1 ]
Perez-Raya, I. [1 ]
机构
[1] Rochester Inst Technol, Dept Mech Engn, Rochester, NY 14623 USA
来源
ASME JOURNAL OF HEAT AND MASS TRANSFER | 2024年 / 146卷 / 05期
关键词
VOF; boiling; mass transfer; two phase flow; Ansys customization; 3D multiphase simulation; adaptive mesh; HEAT-TRANSFER; LEVEL-SET; NUMERICAL-SIMULATION; FLOW SIMULATIONS; BUBBLE DYNAMICS; TRACKING METHOD; COUPLED VOLUME; SINGLE BUBBLE; MASS-TRANSFER; SURFACE;
D O I
10.1115/1.4064459
中图分类号
O414.1 [热力学];
学科分类号
摘要
The present work demonstrates the use of customized ansys-fluent in performing 3D numerical simulations of nucleate boiling with a sharp interface and adaptive mesh refinement. The developed simulation approach is a reliable and effective tool to investigate 3D boiling phenomena by accurately capturing thermal and fluid dynamic interfacial vapor-liquid interaction and reducing computational time. These methods account for 3D sharp interface and thermal conditions of saturation temperature refining the mesh around the bubble edge. User-defined-functions (UDFs) were developed to customize the software ansys-fluent to preserve the interface sharpness, maintain saturation temperature conditions, and perform effective adaptive mesh refinement in a localized region around the interface. Adaptive mesh refinement is accomplished by a UDF that identifies the cells near the contact line and the liquid-vapor interface and applies the adaptive mesh refinement algorithms only at the identified cells. Validating the approach considered spherical bubble growth with an observed acceptable difference between theoretical and simulation bubble growth rates of 10%. Bubble growth simulations with water reveal an influence region of 2.7 times the departure bubble diameter, and average heat transfer coefficient of 15,000 W/m2 K. In addition, the results indicate a reduced computational time of 75 h using adaptive mesh compared to uniform mesh.
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页数:11
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