cold cavity
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2021 ◽  
Vol 409 ◽  
pp. 58-66
Author(s):  
Mustapha Helmaoui ◽  
Houssem Laidoudi ◽  
Abedallah Ghenaim

Numerical simulations were performed to study the pertinent parameters of natural convection in annular space. The studied geometry consists of two semi-circular cylinders of hot walls confined in cold cavity of circular cross-sectional form. The simulations were done by solving numerically the governing equations via the commercial software ANSYS-CFX. The results showed that this new form of inner cylinders is suitable for insulating applications. The pertinent parameters were selected for this work were: Prandtl number (Pr = 0.71 to 1000) and Rayleigh number (Ra = 103, 104 and 105).


2016 ◽  
Vol 57 (73) ◽  
pp. 131-141 ◽  
Author(s):  
David E. Gwyther ◽  
Eva A. Cougnon ◽  
Benjamin K. Galton-Fenzi ◽  
Jason L. Roberts ◽  
John R. Hunter ◽  
...  

ABSTRACTWe present simulation results from a version of the Regional Ocean Modeling System modified for ice shelf/ocean interaction, including the parameterisation of basal melting by molecular diffusion alone. Simulations investigate the differences in melting for an idealised ice shelf experiencing a range of cold to hot ocean cavity conditions. Both the pattern of melt and the location of maximum melt shift due to changes in the buoyancy-driven circulation, in a different way to previous studies. Tidal forcing increases both the circulation strength and melting, with the strongest impact on the cold cavity case. Our results highlight the importance of including a complete melt parameterisation and tidal forcing. In response to the 2.4°C ocean warming initially applied to a cold cavity ice shelf, we find that melting will increase by about an order of magnitude (24 × with tides and 41 × without tides).


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