CFD modelling of radiators in buildings with user-defined wall functions

被引：28

作者：

Risberg, Daniel ^{[1
]}

Risberg, Mikael ^{[1
]}

Westerlund, Lars ^{[1
]}

机构：

[1] Lulea Univ Technol, Div Energy Sci, Energy Engn, SE-97187 Lulea, Sweden

来源：

APPLIED THERMAL ENGINEERING | 2016年 / 94卷

关键词：

CFD modelling; Radiator; User-defined wall functions; Indoor climate; HEAT-TRANSFER; AIR-FLOW; ENVIRONMENT;

D O I：

10.1016/j.applthermaleng.2015.10.134

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The most widely used turbulence model for indoor CFD simulations, the k-epsilon model, has exhibited problems with treating natural convective heat transfer, while other turbulence models have shown to be too computationally demanding. This paper studies how to deal with natural convective heat transfer for a radiator in order to simplify the simulations, and reduce the numbers of cells and simulation time. By adding user-defined wall functions the number of cells can be reduced considerably compared with the k-omega SST turbulence model. The user-defined wall function proposed can also be used with a correction factor for different radiator types without the need to resolve the radiator surface in detail. Compared to manufacturer data the error is less than 0.2% for the investigated radiator height and temperature. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：266 / 273

页数：8

共 17 条

[1]

[Anonymous], 1981, S INT COMBUST

[2]

[Anonymous], 1997, 4422 EN

[3]

ANSYS Incorporation, 2011, ANSYS CFX Solver Theory Guide

[4] Calculation of convective heat transfer coefficients of room surfaces for natural convection [J].