- #1
skyfridge
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This question is regarding the general fluid dynamics involving warm air advection aloft a persistent cold air pool in a small basin that is recessed in a horizontal planar surface. For scale, the basin has a compound parabolic shape, with a 30° viewing angle, a .146m radius at the base, a .292m radius at the aperture and a height of .759m. It has a temperature inversion at the base, with a temperature at the base that is up to 40°C below the ambient temperature aloft.
Angus[1] compares a simpler enclosure uncovered and covered with a polyethylene mesh, under mild winds.
In attempting to answer the questions, I have researched multiple disciplines, including general science, fluid dynamics, meteorology, greenhouse ventilation, building wind loads and agriculture, but I haven't found any specific information to answer the questions.
(1) How would airflow aloft the uncovered basin mix with the cold air pool in the basin under different wind speeds? Specifically, would the temperature inversion minimize mixing? What equations model this case?
(2) To what degree would a screen covering the aperture or recessed in the basin affect mixing of the advection with the cold air pool? What equations would model this case?
[1] Performance comparison of sky window spectral selective and high emittance radiant cooling systems under varying atmospheric conditions, Dr Angus Gentle, Prof Geoff Smith
Angus[1] compares a simpler enclosure uncovered and covered with a polyethylene mesh, under mild winds.
In attempting to answer the questions, I have researched multiple disciplines, including general science, fluid dynamics, meteorology, greenhouse ventilation, building wind loads and agriculture, but I haven't found any specific information to answer the questions.
(1) How would airflow aloft the uncovered basin mix with the cold air pool in the basin under different wind speeds? Specifically, would the temperature inversion minimize mixing? What equations model this case?
(2) To what degree would a screen covering the aperture or recessed in the basin affect mixing of the advection with the cold air pool? What equations would model this case?
[1] Performance comparison of sky window spectral selective and high emittance radiant cooling systems under varying atmospheric conditions, Dr Angus Gentle, Prof Geoff Smith