| Molecular kinetic modelling of non-equilibrium evaporative flows | |
| Li, Shaokang1; Su, Wei2,3; Shan, Baochao1; Li, Zuoxu4; Gibelli, Livio1; Zhang YH(张勇豪)4,5 | |
| Corresponding Author | Gibelli, Livio([email protected]) ; Zhang, Yonghao([email protected]) |
| Source Publication | JOURNAL OF FLUID MECHANICS
 |
| 2024-09-18 | |
| Volume | 994Pages:18 |
| ISSN | 0022-1120 |
| Abstract | Recent years have seen the emergence of new technologies that exploit nanoscale evaporation, ranging from nanoporous membranes for distillation to evaporative cooling in electronics. Despite the increasing depth of fundamental knowledge, there is still a lack of simulation tools capable of capturing the underlying non-equilibrium liquid-vapour phase changes that are critical to these and other such technologies. This work presents a molecular kinetic theory model capable of describing the entire flow field, i.e. the liquid and vapour phases and their interface, while striking a balance between accuracy and computational efficiency. In particular, unlike previous kinetic models based on the isothermal assumption, the proposed model can capture the temperature variations that occur during the evaporation process, yet does not require the computational resources of more complicated mean-field kinetic approaches. We assess the present kinetic model in three test cases: liquid-vapour equilibrium, evaporation into near-vacuum condition, and evaporation into vapour. The results agree well with benchmark solutions, while reducing the simulation time by almost two orders of magnitude on average in the cases studied. The results therefore suggest that this work is a stepping stone towards the development of an accurate and efficient computational approach to optimising the next generation of nanotechnologies based on nanoscale evaporation. |
| Keyword | non-continuum effects condensation/evaporation kinetic theory |
| DOI | 10.1017/jfm.2024.605 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001314642500001 |
| WOS Keyword | LATTICE BOLTZMANN MODELS ; KNUDSEN LAYERS ; MONTE-CARLO ; SIMULATION ; PHASE ; GAS |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | UK 's Engineering and Physical Sciences Research Council[EP/R041938/2] ; Chinese Scholarship Council |
| Funding Organization | UK 's Engineering and Physical Sciences Research Council ; Chinese Scholarship Council |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Gibelli, Livio ; Zhang, Yonghao |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96713 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Univ Edinburgh, Sch Engn, Edinburgh EH9 3FB, Scotland; 2.Hong Kong Univ Sci & Technol, Div Emerging Interdisciplinary Areas, Hong Kong, Peoples R China; 3.Hong Kong Univ Sci & Technol, Dept Math, Clear Water Bay, Hong Kong, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Ctr Interdisciplinary Res Fluids, Beijing 100190, Peoples R China; 5.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Shaokang,Su, Wei,Shan, Baochao,et al. Molecular kinetic modelling of non-equilibrium evaporative flows[J]. JOURNAL OF FLUID MECHANICS,2024,994:18.Rp_Au:Gibelli, Livio, Zhang, Yonghao |
| APA | Li, Shaokang,Su, Wei,Shan, Baochao,Li, Zuoxu,Gibelli, Livio,&张勇豪.(2024).Molecular kinetic modelling of non-equilibrium evaporative flows.JOURNAL OF FLUID MECHANICS,994,18. |
| MLA | Li, Shaokang,et al."Molecular kinetic modelling of non-equilibrium evaporative flows".JOURNAL OF FLUID MECHANICS 994(2024):18. |
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