On the thermal entrance length of moderately dense gas-particle flows
On the thermal entrance length of moderately dense gas-particle flows
复制标题
中等密度气体-颗粒流的热入口长度
DOI:
10.1016/j.ijheatmasstransfer.2021.121985
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发表时间:
2022
影响因子:
5.2
通讯作者:
Capecelatro, J.
中科院分区:
文献类型:
--
作者:
Beetham, S.;Lattanzi, A.;Capecelatro, J.
The dissipative nature of heat transfer relaxes thermal flows to an equilibrium state that is devoid of temperature gradients. The distance to reach an equilibrium temperature – the thermal entrance length – is a consequence of diffusion and mixing by convection. The presence of particles can modify the thermal entrance length due to interphase heat transfer and turbulence modulation by momentum coupling. In this work, Eulerian–Lagrangian simulations are utilized to probe the effect of solids heterogeneity (e.g., clustering) on the thermal entrance length. For the moderately dense systems considered here, clustering leads to a factor of 2–3 increase in the thermal entrance length, as compared to an uncorrelated (perfectly mixed) distribution of particles. The observed increase is found to be primarily due to the covariance between volume fraction and temperature fluctuations, referred to as the fluid drift temperature. Using scaling arguments and Gene Expression Programming, closure is obtained for this term in a one-dimensional averaged two-fluid equation and is shown to be accurate under a wide range of flow conditions.
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影响因子:
3.7
作者:
Himanshu Goyal;O. Desjardins;P. Pepiot;J. Capecelatro
通讯作者:
Himanshu Goyal;O. Desjardins;P. Pepiot;J. Capecelatro
DOI:
--
发表时间:
1968
期刊:
影响因子:
--
作者:
Y. Lee
通讯作者:
Y. Lee
影响因子:
3.5
作者:
Liyan Qiu;V. Murashov;M. White
通讯作者:
Liyan Qiu;V. Murashov;M. White
影响因子:
42.1
作者:
Lube, Gert;Breard, Eric C.;Esposti-Ongaro, Tomaso;Dufek, Josef;Brand, Brittany
通讯作者:
Brand, Brittany
DOI:
--
发表时间:
1957
期刊:
影响因子:
--
作者:
E. Sparrow;T. M. Hallman;R. Siegel
通讯作者:
R. Siegel