| Title | Enhanced heat transport in partitioned thermal convection |
| Authors | Bao, Yun Chen, Jun Liu, Bo-Fang She, Zhen-Su Zhang, Jun Zhou, Quan |
| Affiliation | Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China. Peking Univ, Coll Engn, Dept Mech & Engn Sci, Beijing 100871, Peoples R China. Sun Yat Sen Univ, Dept Mech, Guangzhou 510275, Guangdong, Peoples R China. Shanghai Univ, Shanghai Inst Appl Math & Mech, Shanghai 200072, Peoples R China. Shanghai Univ, Shanghai Key Lab Mech Energy Engn, Shanghai 200072, Peoples R China. NYU, Courant Inst, New York, NY 10012 USA. NYU, Dept Phys, New York, NY 10012 USA. NYU Shanghai, NYU ECNO Inst Math Sci & Phys Res, Shanghai 200062, Peoples R China. |
| Keywords | Benard convection turbulent convection turbulent flows RAYLEIGH-BENARD CONVECTION PRANDTL-NUMBER DEPENDENCE TURBULENT CONVECTION NUMERICAL SIMULATIONS RECTANGULAR CELLS ULTIMATE REGIME FLOW SURFACE |
| Issue Date | 2015 |
| Publisher | JOURNAL OF FLUID MECHANICS |
| Citation | JOURNAL OF FLUID MECHANICS.2015,784. |
| Abstract | Enhancement of heat transport across a fluid layer is of fundamental interest as well as great technological importance. For decades, Rayleigh-Benard convection has been a paradigm for the study of convective heat transport, and how to improve its overall heat-transfer efficiency is still an open question. Here, we report an experimental and numerical study that reveals a novel mechanism that leads to much enhanced heat transport. When vertical partitions are inserted into a convection cell with thin gaps left open between the partition Walls and the cooling/heating plates, it is found that the convective flow becomes sell organized and more coherent, leading to an unprecedented heat-transport enhancement. In particular, our experiments show that with six partition walls inserted, the heat flux can be increased by approximately 30%. Numerical simulations show a remarkable heat-flux enhancement of up to 2.3 times (with 28 partition walls) that without any partitions |
| URI | http://hdl.handle.net/20.500.11897/435843 |
| ISSN | 0022-1120 |
| DOI | 10.1017/jfm.2015.610 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 工学院 湍流与复杂系统国家重点实验室 |
