重庆理工大学学报2026，Vol.40Issue(5)：193-202,10.DOI:10.3969/j.issn.1674-8425(z).2026.03.024
辐射热增益下全浮区液桥稳态热毛细对流研究
Study of the steady-state thermocapillary convection in fully-floating liquid bridges under radiative heat gain conditions
摘要
Abstract
This paper investigates the radiative heat gain heating conditions created through circumferential heating.Utilizing Particle Image Velocimetry(PIV),the experimental study examines how heating rate and aspect ratio influence the spatiotemporal evolution of the steady-state thermocapillary convection within the liquid bridge's full floating zone,as well as the transverse and longitudinal velocity distributions.Results indicate the intrusion of the upper zone's cellular flow into the lower zone intensifies as the absolute difference in the Richardson number between the upper and lower floating zones(|ΔRi|)increases,suppressing the lower zone's cellular flow near the free interface.Because the bulk return flow in the central region of the upper floating zone becomes more pronounced with the rise of the heating rate,the flow direction is opposite to the conductive heat transfer induced by radiative heat exchange.Meanwhile,as the interfacial convective heat transfer intensifies,the cold fluid carried by the bulk return flow rapidly replenishes the interface,resulting in a progressive increase in the temperature difference within the upper floating zone.Moreover,an increase in the aspect ratio of the liquid bridge promotes the upward movement of vortex cores in the upper floating zone's cellular flow and enhances the temperature difference in the lower zone,thus facilitating the development of cellular flow and accelerating the interfacial flow velocity in the lower floating zone.关键词
热毛细对流/全浮区液桥/辐射热增益/稳态流Key words
thermal buoyancy-driven capillary convection/fully floating zone liquid bridge/radiative heat gain/steady-state flow分类
数理科学引用本文复制引用
杨硕,冯驭,吴峻冰,梁凯,刘展志,刘哲,崔洁,罗金涛,王天羽..辐射热增益下全浮区液桥稳态热毛细对流研究[J].重庆理工大学学报,2026,40(5):193-202,10.基金项目
国家自然科学基金项目(51906163) （51906163）
辽宁省科学技术计划面上项目(2021-MS-270) （2021-MS-270）
辽宁省教育厅高等学校基本科研业务项目(LJ242411632102) （LJ242411632102）
辽宁省科技计划联合计划(基金)应用基础研究项目(2023JH2/101700256) （基金）
