Free convection with velocity slip and temperature jump in a vertical polygonal duct with a heated circular core is semianalytically solved by the methods of eigenfunction expansion and point match. The conditions of the core wall being at uniform wall temperature or uniform heat flux are considered. It is shown that the temperature and flowfields can be very different from those without the velocity slip and temperature jump. The optimum core radius and the corresponding maximum flow rate are numerically determined for some values of the slip length, temperature jump coefficient, and the number of sides of the polygon.
Natural Convection for Slip Flow in a Vertical Polygonal Duct
Journal of Thermophysics and Heat Transfer ; 29 , 1 ; 117-126
2014-10-01
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch