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- W3003377309 abstract "In this experimental study, a natural convection flow in a differentially heated cavity has been disturbed in order to modify heat transfers. The disturbance is achieved by introducing a localized obstacle which acts as a small spatial extent passive system. The obstacle is placed inside the hot boundary layer of the cavity flow. Measurements have been carried out in terms of velocity fields, temperature profiles and heat transfers. The influence of the length and the vertical location for an insulating and a conducting obstacle have been analyzed. For the insulating obstacle, a part of the flow is deviated inside the colder core region in front of the obstacle, which leads to an increase of the downstream heat transfers as the deviated colder flow returns along the hot wall. For the conducting obstacle, a hot thermal plume is generated, which counters the obstacle effect observed for the insulating obstacle. In that case, the downstream heat transfer is increased or reduced depending on the vertical location of the obstacle. Relative changes on heat transfers compared to the case without obstacle are larger for longer obstacles and for higher vertical locations of the obstacle, for any conductivity. For instance, a relative heat transfer increase up to 83% is observed downstream the insulating obstacle for the largest length and highest vertical location." @default.
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- W3003377309 date "2020-05-01" @default.
- W3003377309 modified "2023-09-30" @default.
- W3003377309 title "Heat transfer modification of a natural convection flow in a differentially heated cavity by means of a localized obstacle" @default.
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- W3003377309 doi "https://doi.org/10.1016/j.ijthermalsci.2020.106279" @default.
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