Heat transfer mechanism in vibrational turbulent Rayleigh-Benard convection with rough plates

被引：3

作者：

Tong, Huilin ^{[1
]}

Wang, Zhengyu ^{[1
]}

Wang, Zhengdao ^{[1
]}

Yang, Hui ^{[1
]}

Qian, Yuehong ^{[2
,3
]}

Wei, Yikun ^{[1
]}

机构：

[1] Zhejiang Sci Tech Univ, Key Lab Fluid Transmiss Technol Zhejiang Prov, Zhejiang, Peoples R China

[2] Soochow Univ, Sch Math Sci, Suzhou, Jiangsu, Peoples R China

[3] Zhejiang Normal Univ, Coll Math & Comp Sci, Jinhua, Peoples R China

来源：

NUMERICAL HEAT TRANSFER PART A-APPLICATIONS | 2024年 / 85卷 / 18期

基金：

中国国家自然科学基金;

关键词：

Heat transfer; Rayleigh-Benard convection; roughness; vibration; THERMOVIBRATIONAL CONVECTION; THERMAL-CONVECTION; SURFACE-ROUGHNESS; PLUMES; FLUCTUATIONS; TEMPERATURE; ENHANCEMENT; VELOCITY; FLUID;

D O I：

10.1080/10407782.2023.2231140

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The joint effect of rectangular-type roughness and horizontal vibration on two-dimensional (2D) turbulent Rayleigh-Benard convection (RBC) is investigated by using the thermal lattice Boltzmann method (LBM) in this article. The present work focuses on the Nusselt number and plume dynamics of the convection in the range of dimensionless vibration frequency 0 & LE; & omega;* & LE; 1000 and the range of dimensionless roughness height 0 & LE; h* & LE; 0.05. The Rayleigh number is 108 and Prandtl number is 4.38. Our numerical results indicate that the relationship between the Nusselt number and roughness height is mostly proportional, and the relationship between the Nusselt number and the vibration frequency is exponential. It is further found that heat transfer enhances by 3.06 times under the joint effect of horizontal vibration and rectangular roughness on turbulent RBC. It provides significant physical insight into the mechanism of cooperative heat transfer enhancement.

引用

页码：2967 / 2981

页数：15

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