Abstract
The natural convection characteristics of gas in a vertical narrow annular gap which had its bottom opened to high temperature fluid and its upper shielding exposed to low temperature sealant have been evaluated from simulated fluid experiments using water and from calculations using the three-dimensional thermal hydraulic analysis computer code THERVIS-III. The following results were obtained: 1. The critical Rayleigh number which represented the limit of convection generation increased as the aspect ratios e1 (height/circumference) and e2 (height/gap distance) increased. 2. The flow pattern along the circumferential direction was seen to depend more strongly on the radiant heat from the side wall, rather than the aspect ratios e1 and e2. 3. The temperature difference along the circumferential direction in the annular gap obtained from the calculation code coincided with that obtained from experiments within ±10%, by taking account of a loss in gravitational head difference due to thermal conduction acro...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
