Numerical study on the dynamic process of single plume flow in thermal convection with polymers
Numerical study on the dynamic process of single plume flow in thermal convection with polymers
复制标题
聚合物热对流中单羽流动态过程的数值研究
DOI:
10.1063/1.5083195
复制
发表时间:
2019
影响因子:
4.6
通讯作者:
Qian Shi Zhi
中科院分区:
文献类型:
--
作者:
Cheng Jian Ping;Cai Wei Hua;Zhang Hong Na;Li Feng Chen;Shen Lian;Qian Shi Zhi
A direct numerical simulation of single plume flow in thermal convection with polymers was carried out in a domain with 1:3 as the width to height ratio. The heat transport ability is weakened by adding polymers within the here-investigated governing parameter range. However, it is promoted when the maximum polymer extension L is increased. The distribution of vertical velocity and temperature indicates that the plume in the polymer solution case is speeded up and widens bigger as compared to that in the Newtonian fluid case. Inside the plume, polymer chains tend to release energy at the position where the velocity is decelerated. The ratio of Nusselt numbers (Nu/NuNew ) shows the power-law scaling relation with the governing parameter L2/Wi in polymer solution cases, which is only applicable for moderate Wi and small L. The present study can give direct insight into the observation about plumes in turbulent thermal convection experiments. It is therefore useful for the analysis of heat transport in thermal convection with polymers. Published under license by AIP Publishing. https://doi.org/10.1063/1.5083195
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影响因子:
4.6
作者:
Takahiro Ukai;H. Zare-Behtash;K. Kontis
通讯作者:
Takahiro Ukai;H. Zare-Behtash;K. Kontis
影响因子:
4.6
作者:
Yu Zhang;Yuhui Cao
通讯作者:
Yuhui Cao
影响因子:
3.7
作者:
É. Kaminski;C. Jaupart
通讯作者:
É. Kaminski;C. Jaupart
DOI:
10.1103/physreve.86.016325
发表时间:
2011-11
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
Ping Wei;R. Ni;K. Xia
通讯作者:
Ping Wei;R. Ni;K. Xia
影响因子:
3.7
作者:
R. S. Brand;F. Lahey
通讯作者:
R. S. Brand;F. Lahey