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مکانیک::
جریان همرفتی
Natural convection flows can be modelled by the inclusion of a buoyancy source term.
For natural convection flows the changes of density are relatively small i.e.
The convective flow and resulting temperature distribution between the absorber tube and the secondary reflector
Fluid flow around the absorber tube is entrapped by the secondary reflector which minimises the convection flow from the absorber tube to the cavity.
A thin transparent surface was added under the secondary reflector in CFD model (Figure 4.24) to investigate the effect of convection flow near the receiver and heat loss from the absorber tube.
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