Development of a two-domain-approach-based multi-scale model for the two-phase flows in space accumulators in microgravity
文献类型：期刊论文
| 作者 | Wang, Qing5,6,7; Wang, Qinggong5; Gu, Junping5; Cheverda, Vyacheslav Vladimirovich3,4; Zhu ZQ(朱志强)2; Zhao X(赵霄)2; Liu, Xuefeng7; Wang, Lubin1; Yu, Qiang7 |
| 刊名 | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
 |
| 出版日期 | 2026 |
| 卷号 | 254页码:14 |
| 关键词 | Two-domain approach Multi-scale structure Space accumulator Fluid management Microgravity |
| ISSN号 | 0017-9310 |
| DOI | 10.1016/j.ijheatmasstransfer.2025.127668 |
| 通讯作者 | Wang, Qinggong(wangqinggong.2011@tsinghua.org.cn) ; Gu, Junping(gujunping@ustb.edu.cn) ; Yu, Qiang(yuqiang@nssc.ac.cn) |
| 英文摘要 | Management of cryogenic fluid is critical for space accumulators in both loop heat pipe (LHP) and mechanically pumped two-phase loop (MPTL) system. To achieve proper fluid transport in the extreme environments in space, some complex structures are used in these apparatuses including porous meshes and porous vanes. The coexistence of free flow regions and porous medium regions results in a common cross-scale two-phase flow in the multi-scale structures. However, there is a lack of reliable mathematical methods to describe such flows, and thus the flow dynamics in space accumulators are hard to analyze. To solve this problem, we build a coupled multiscale two-phase flow mathematical model based on the two-domain approach: on Onsager's variational principle, minimizing the energy dissipation of the system to derive fluid dynamic equations and interface evolution equations. Navier-Stokes equations for the free flow region and Darcy equation for the porous medium region are derived separately. To account for capillary-driven flow in microgravity, the Darcy equation is modified by explicitly including the capillary force. The boundary conditions that couple fluid dynamic equations and the interface capture methods are incorporated into the model. After validation, the model is applied to analyze transient two-phase flow behavior inside two typical space accumulators in microgravity: one for LHP and the other for MPTL. The flow characteristics are demonstrated, and different porous structures are compared for geometric optimization purposes. The results show that the primary wick of the LHP accumulator with a small pore radius (rc1 = 20 mu m) generates substantial capillary pressure (-170 Pa) to maintain fluid circulation, and the secondary wick with a large pore radius (rc2 = 50 mu m) enables efficient liquid delivery. In the accumulator of MPTL system, the implementation of porous mesh with a large pore radius (rc = 80 mu m) significantly enhances the liquid replenishment rate (i.e., 0.017 m/s). |
| 分类号 | 一类 |
| WOS关键词 | LOOP HEAT-PIPE ; COUPLED STOKES ; EVAPORATOR ; SIMULATION ; OPERATION ; PORE |
| 资助项目 | Beijing Natural Science Foundation[L241004] ; National Key Research and Development Program of China[2022YFF0503502] ; Beijing Nova Program[20230484334] ; Fundamental Research Funds for the Central Universities[FRF-TP-25-016] ; Guilin Major Special Project[20220103-1] ; Guangxi Science and Technology Base and Talent Special Project[Gui Ke AD24010012] ; Guangxi Key Research and Development Plan[Gui Ke AB23026105] |
| WOS研究方向 | Thermodynamics ; Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001561483000001 |
| 资助机构 | Beijing Natural Science Foundation ; National Key Research and Development Program of China ; Beijing Nova Program ; Fundamental Research Funds for the Central Universities ; Guilin Major Special Project ; Guangxi Science and Technology Base and Talent Special Project ; Guangxi Key Research and Development Plan |
| 其他责任者 | Wang, Qinggong ; Gu, Junping ; Yu, Qiang |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/103638]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 作者单位 | 1.Guilin Inst Informat Technol, Guilin 541004, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 3.Novosibirsk State Univ, Novosibirsk 630090, Russia; 4.RAS, Inst Thermophys, SB, Novosibirsk 630090, Russia; 5.Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China; 6.Univ Chinese Acad Sci, Sch Comp Sci & Technol, Beijing 100049, Peoples R China; 7.Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Wang, Qing,Wang, Qinggong,Gu, Junping,et al. Development of a two-domain-approach-based multi-scale model for the two-phase flows in space accumulators in microgravity[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2026,254:14. |
| APA | Wang, Qing.,Wang, Qinggong.,Gu, Junping.,Cheverda, Vyacheslav Vladimirovich.,朱志强.,...&Yu, Qiang.(2026).Development of a two-domain-approach-based multi-scale model for the two-phase flows in space accumulators in microgravity.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,254,14. |
| MLA | Wang, Qing,et al."Development of a two-domain-approach-based multi-scale model for the two-phase flows in space accumulators in microgravity".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 254(2026):14. |
入库方式： OAI收割
来源：力学研究所
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