NUMERICAL SIMULATION FOR THERMAL DESIGN OF A GAS WATER HEATER WITH TURBULENT COMBINED CONVECTION

被引:0
作者
Yari, Ali [1 ]
Hosseinzadeh, Siamak [2 ]
Golneshan, Ali Akbar [1 ]
Ghasemiasl, Ramin [2 ]
机构
[1] Shiraz Univ, Dept Mech Engn, Shiraz, Iran
[2] Islamic Azad Univ, Dept Mech Engn, West Tehran Branch, Tehran, Iran
来源
PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2015, VOL 1 | 2015年
关键词
LARGE-EDDY SIMULATION; BOUNDARY-LAYER; SQUARE CHANNEL; FLAT-PLATE; FLOW;
D O I
暂无
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
This article investigates the effects of geometric parameters on a turbulent asymmetrical heat transfer in vertical channels with radiation and blowing from a wall. Hydrodynamic behaviour and heat transfer results are obtained by the solution of the complete Navier-Stokes and energy equations using a control volume finite element method. In this paper, commercial codes were used to solve the equations. The equations involved were numerically solved with three turbulent models including Spalart-Allmaras, R-N-G k-epsilon with 'standard wall function' wall nearby model, R-N-G k-epsilon with 'enhanced wall treatment' wall nearby model and 'ray tracing' radiation techniques. Turbulent flow with 'low Reynolds Spalart-Allmaras turbulence model' and radiation with 'discrete transfer radiation method' was modelled. The results were compared with experimental data and appropriate methods were selected for turbulent modelling. The problems of different Grashof number, Reynolds number, radiation parameters and Prandtl number were solved and the effects of geometric parameters on the fluid flow, radiation-convection blowing heat transfer and the total efficiency were determined.
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页数:12
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