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Numerical Simulation on Effect of Side-on Wind Speed on Combined Heat Loss Characteristics of a Cavity
Author(s): 
Pages: 376-379
Year: Issue:  2
Journal: Journal of Engineering Thermophysics

Keyword:  cylindrical cavityside-on windwind speedcombined heat lossnumerical simulation;
Abstract: Considering conduction heat loss through the insulation and cavity wall,3D numerical simulation has been carried out to investigate the impact of the side-on wind speed on combined convection and surface radiation heat losses characteristics of a fully open cylindrical cavity with all surfaces heated by constant heat flux.Results reveal that the temperature contours inside the cavity and the velocity contours on the aperture plane under side-on wind environment are quite different from that of no wind case.With the increasing of side-on wind speed,average convection heat loss Nusselt number Nu_c goes up gradually with wind speed.However,as wind speed increases,average radiation heat loss Nusselt number Nu_r decreases monotonously,and then increases slightly.With the increasing of wind speed,the variation of Nu_r becomes more and more insensitive.With the increasing of inclined angle,Nu_c and Nu_r under certain wind speed do not always vary monotonically as that of no-wind cases.
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