NATURAL CONVECTION IN AN ENCLOSURE WITH LOCALIZED HEATING AND COOLING: A NUMERICAL STUDY

1994 ◽  
Author(s):  
F.K Gatheri ◽  
John Reizes ◽  
Eddie Leonardi ◽  
Graham de Vahl Davis
Keyword(s):  
Natural Convection ◽  
Numerical Study ◽  
Heating And Cooling ◽  
Localized Heating

A Numerical Study on 2-D Flow and Heat Transfer in a Natural Gas Heater

2016 ◽  
Author(s):  
Yun Guo ◽  
Zhixiong Guo
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Natural Gas ◽  
Numerical Study ◽  
Radiation Heat Transfer ◽  
Transfer Model ◽  
Radiation Heat ◽  
Effective Measure ◽  
Heating And Cooling ◽  
Application Systems

The cylinder type natural gas heater with heat transfer medium is most widely used in gas application systems. But the conventional symmetrical arrangement of heat-exchange surfaces in cylinder is not conducive to the formation of an effective heat flow field. An effective measure of rotating the symmetrical layout structure at a certain angle is put forward creatively, which can optimize the overall heat transfer effect of the heater. The combined natural convection and radiation heat transfer model for both heating and cooling surfaces in the heat-exchanging cylinder is built. The finite volume method with unstructured body-fitted grids is employed. Analyses and comparisons of the flow conditions and temperature distributions of the cylindrical natural gas heater indifferent clockwise rotation angles (10°, 20°, 30°, 35°) are carried out. With increasing of the angle, the natural convection and radiation heat transfer will be correspondingly enhanced. When the angle exceeds than 30°, however, the natural convective circulation is destroyed instead. The numerical simulation shows the best rotation angle is 20∼30°.

Numerical Study on the Flow and Heat Transfer for the inside of the Cylinder Type Natural Gas Heater

2013 ◽  
Vol 860-863 ◽  
pp. 1441-1444
Author(s):  
Yun Guo ◽  
Zhi Qiang Huang ◽  
Shun Xin Yang
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Natural Gas ◽  
Numerical Study ◽  
Heating Surface ◽  
Gas Production ◽  
Transfer Model ◽  
Heat Transfer Medium ◽  
Heating And Cooling ◽  
Application Systems

The cylinder type natural gas heater is an indispensable piece of equipment in gas production, transmission, and application systems. According to the distinctive structure of the cylinder natural gas heater, the natural convection heat transfer model of both heating surface and cooling surface in the cylinder was built, the temperature and velocity field of the natural convection of the heat-transfer medium--ethylene glycol were numerically simulated. The simulation results show that the symmetrical arrangement of heating and cooling surfaces is not conducive to the formation of an effective heat flow field. Therefore, effective optimizing the layout of the heating and cooling surfaces is obviously a problem that must be solved, to help the heat-transfer medium form a well-organized flow and enhance the heat transfer.

EXPERIMENTAL AND NUMERICAL STUDY OF THREE-DIMENSIONAL NATURAL CONVECTION AND FREEZING IN WATER

1994 ◽  
Author(s):  
C. Abegg ◽  
Graham de Vahl Davis ◽  
W.J. Hiller ◽  
St. Koch ◽  
Tomasz A. Kowalewski ◽  
...  
Keyword(s):  
Natural Convection ◽  
Numerical Study ◽  
Three Dimensional

EXPERIMENTAL AND NUMERICAL STUDY OF NATURAL CONVECTION AROUND A SQUARE DISK

Equipment ◽  
2006 ◽  
Author(s):  
A. Willockx ◽  
C. T'Joen ◽  
H. Steeman ◽  
M. De Paepe
Keyword(s):  
Natural Convection ◽  
Numerical Study

NUMERICAL STUDY OF NATURAL CONVECTION IN A SPHERICAL POROUS ANNULUS

2016 ◽  
Vol 19 (3) ◽  
pp. 277-286 ◽  
Author(s):  
Sangita ◽  
Mrityunjay K. Sinha ◽  
R. V. Sharma
Keyword(s):  
Natural Convection ◽  
Numerical Study
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